iOS —— 3Gshare项目总结与思考

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- (void)saveLoginStatus {
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    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
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    [defaults setObject:@"wutong" forKey:@"username"];
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    [defaults setBool:YES forKey:@"isLoggedIn"];
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    [defaults synchronize]; // 可选
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}
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//读取时
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NSString *name = [[NSUserDefaults standardUserDefaults] objectForKey:@"username"];
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BOOL isLoggedIn = [[NSUserDefaults standardUserDefaults] boolForKey:@"isLoggedIn"];

NSUserDefaults 的 setObject:forKey: 是用于保存简单用户数据的 API，轻量、易用，适合设置类数据（如用户名、偏好设置、登录状态等）。

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//  3GShareee
2
//
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//  Created by 吴桐 on 2025/7/18.
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//
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#import "UserManager.h"
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@implementation UserManager
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//单例
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+ (instancetype)sharedManager {
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    static UserManager *manager = nil;
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    static dispatch_once_t onceToken;
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    dispatch_once(&onceToken, ^{
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        manager = [[UserManager alloc] init];
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        [manager loadUserData];
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    });
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    return manager;
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}
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- (id)init {
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    self = [super init];
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    if (self) {
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        _usernames = [NSMutableArray array];
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        _passwords = [NSMutableArray array];
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        [_usernames addObject:@"1"];
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        [_passwords addObject:@"1"];
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    }
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    return self;
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}
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//保存到本地
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- (void)saveUserData {
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    [[NSUserDefaults standardUserDefaults] setObject:self.usernames forKey:@"savedUsernames"];
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    [[NSUserDefaults standardUserDefaults] setObject:self.passwords forKey:@"savedPasswords"];
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    [[NSUserDefaults standardUserDefaults] synchronize];    //不懂，好像是保存
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}
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- (void)loadUserData {
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    NSArray *savedUsernames = [[NSUserDefaults standardUserDefaults] objectForKey:@"savedUsernames"];
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    NSArray *savedPasswords = [[NSUserDefaults standardUserDefaults] objectForKey:@"savedPasswords"];
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    NSDictionary *savedGenders = [[NSUserDefaults standardUserDefaults] objectForKey:@"savedUserGenders"];
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    if (savedUsernames) {
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        self.usernames = [savedUsernames mutableCopy];
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    }
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    if (savedPasswords) {
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        self.passwords = [savedPasswords mutableCopy];
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    }
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    if (![self.usernames containsObject:@"1"]) {
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        [self.usernames addObject:@"1"];
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        [self.passwords addObject:@"1"];
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    }
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}
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- (BOOL)updatePasswordForUser:(NSString *)username oldPassword:(NSString *)oldPassword newPassword:(NSString *)newPassword {
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    NSUInteger index = [self.usernames indexOfObject:username];
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    if (index == NSNotFound) {  //NSNotFound 是 Objective-C 中的一个常量，表示“没有找到”的情况，常用于查找操作的结果。
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        return NO;
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    }
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    if (![oldPassword isEqualToString:self.passwords[index]]) {
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        return NO;
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    }
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    // 更新密码
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    self.passwords[index] = newPassword;
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    [self saveUserData];
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    return YES;
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}
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@end

同时，我设置了管理员密码1 1，用于绕过调试时便捷登陆，不必输入较长密码。注册功能和修改密码功能中，密码为不小于6位的数字或字母。

自动登录#

我设置了autoBtn，和autoBtn01。前者为切换的按钮主体，后者为一个辅助按钮，当用户点击文字时，也会触发和前者相同的函数从而实现按钮图标的切换，更加人性化。

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[self.autoBtn setImage: [UIImage imageNamed: @"autoreserved.png"] forState: UIControlStateNormal];
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    [self.autoBtn setImage: [UIImage imageNamed: @"autohighlighted.png"] forState: UIControlStateSelected];
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    self.autoBtn.selected = NO;
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    [self.autoBtn addTarget: self action: @selector(pressAuto) forControlEvents: UIControlEventTouchUpInside];
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self.autoBtn1 = [UIButton buttonWithType: UIButtonTypeRoundedRect];
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    self.autoBtn1.frame = CGRectMake(67, 550, 64, 16);
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    [self.autoBtn1 setTitle: @"自动登录" forState: UIControlStateNormal];
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    [self.autoBtn1 setTintColor: [UIColor colorWithDisplayP3Red: 14.0 / 255 green: 46.0 / 255 blue: 121.0 / 255 alpha: 1.0]];
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    [self.autoBtn1 addTarget: self action: @selector(pressAuto) forControlEvents: UIControlEventTouchUpInside];
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#### 登陆
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```objective-c
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UserManager *userManager = [UserManager sharedManager];
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    self.arrayUsername = userManager.usernames;
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    self.arrayPassword = userManager.passwords;

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-(void) pressLeft:(UIButton *) button{
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    NSString *username = self.userName.text;
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    NSString *password = self.passWord.text;
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    // 非空检查
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    if (username.length == 0 || password.length == 0) {
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        [self showAlertWithMessage:@"用户名和密码不能为空"];
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        return;
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    }
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    // 长度限制
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    if (username.length > 10 || password.length > 10) {
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        [self showAlertWithMessage:@"用户名和密码不能超过10个字符"];
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        return;
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    }
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    // 正则判断是否仅包含字母、数字、下划线
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    // 本人暂时还没学...
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    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"^[A-Za-z0-9_]+$" options:0 error:nil];
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    if ([regex numberOfMatchesInString:username options:0 range:NSMakeRange(0, username.length)] == 0 ||
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        [regex numberOfMatchesInString:password options:0 range:NSMakeRange(0, password.length)] == 0) {
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        [self showAlertWithMessage:@"用户名和密码只能包含字母、数字和下划线"];
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        return;
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    }
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    BOOL correct = NO;
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    for (int i = 0; i < self.arrayUsername.count; i++) {
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            if ([self.arrayUsername[i] isEqualToString: self.userName.text] &&
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                [self.arrayPassword[i] isEqualToString: self.passWord.text] &&
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                (self.userName.text != nil) &&
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                (self.passWord.text != nil)) {
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                correct = YES;
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                // 保存当前登录用户
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                UserManager *userManager = [UserManager sharedManager];
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                userManager.currentUser = self.userName.text;
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                break;
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            }
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        }
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    if (!correct) {
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        UIAlertController* wrongWarning  = [UIAlertController alertControllerWithTitle:@"❗️" message:@"账号密码错误！" preferredStyle:UIAlertControllerStyleAlert];
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        UIAlertAction* sure = [UIAlertAction actionWithTitle:@"O K" style:UIAlertActionStyleDefault handler:nil];
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        [wrongWarning addAction:sure];
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        [self presentViewController:wrongWarning animated:YES completion:nil];
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    } else {
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        FirstVC* firstView = [[FirstVC alloc] init];
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        firstView.view.backgroundColor = [UIColor colorWithRed: (230.0 / 255) green: (222.0 / 255) blue: (220.0 / 255) alpha: 1];
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        firstView.tabBarItem = [[UITabBarItem alloc] initWithTitle: nil image: [[UIImage imageNamed: @"FirstVC.png"]  imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] selectedImage: [[UIImage imageNamed: @"FirstVC_tapped.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] ];
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        SecondVC* secondView = [[SecondVC alloc] init];
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        secondView.view.backgroundColor = [UIColor colorWithRed: (230.0 / 255) green: (222.0 / 255) blue: (220.0 / 255) alpha: 1];
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        secondView.tabBarItem = [[UITabBarItem alloc] initWithTitle: nil image: [[UIImage imageNamed: @"SecondVC.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] selectedImage: [[UIImage imageNamed: @"SecondVC_tapped.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] ];
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        ThirdVC* thirdView = [[ThirdVC alloc] init];
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        thirdView.view.backgroundColor = [UIColor colorWithRed: (230.0 / 255) green: (222.0 / 255) blue: (220.0 / 255) alpha: 1];
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        thirdView.tabBarItem = [[UITabBarItem alloc] initWithTitle: nil image: [[UIImage imageNamed: @"ThirdVC.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] selectedImage: [[UIImage imageNamed: @"ThirdVC_tapped.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] ];
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        FourthVC* fourthView = [[FourthVC alloc] init];
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        fourthView.view.backgroundColor = [UIColor colorWithRed: (230.0 / 255) green: (222.0 / 255) blue: (220.0 / 255) alpha: 1];
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        fourthView.tabBarItem = [[UITabBarItem alloc] initWithTitle: nil image: [[UIImage imageNamed: @"FourthVC.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] selectedImage: [[UIImage imageNamed: @"FourthVC_tapped.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] ];
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        FifthVC* fifthView = [[FifthVC alloc] init];
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        fifthView.view.backgroundColor = [UIColor colorWithRed: (230.0 / 255) green: (222.0 / 255) blue: (220.0 / 255) alpha: 1];
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        fifthView.tabBarItem = [[UITabBarItem alloc] initWithTitle: nil image: [[UIImage imageNamed: @"FifthVC.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] selectedImage: [[UIImage imageNamed: @"FifthVC_tapped.png"] imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal] ];
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        //用NavigationController将每个视图包起来
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        UINavigationController* navigationFirst = [[UINavigationController alloc] initWithRootViewController:firstView];
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        UINavigationController* navigationSecond = [[UINavigationController alloc] initWithRootViewController:secondView];
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        UINavigationController* navigationThird = [[UINavigationController alloc] initWithRootViewController:thirdView];
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        UINavigationController* navigationFourth = [[UINavigationController alloc] initWithRootViewController:fourthView];
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        UINavigationController* navigationFifth = [[UINavigationController alloc] initWithRootViewController:fifthView];
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        //组装
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        UINavigationBarAppearance* appearance = [[UINavigationBarAppearance alloc] init];
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        appearance.backgroundColor = [UIColor colorWithRed: (43.0 / 255) green: (123.0 / 255) blue: (191.0 / 255) alpha: 1];
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        firstView.navigationController.navigationBar.standardAppearance = appearance;
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        firstView.navigationController.navigationBar.barStyle = UIBarStyleDefault;
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        firstView.navigationController.navigationBar.scrollEdgeAppearance = appearance;
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        secondView.navigationController.navigationBar.scrollEdgeAppearance = appearance;
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        thirdView.navigationController.navigationBar.scrollEdgeAppearance = appearance;
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        fourthView.navigationController.navigationBar.scrollEdgeAppearance = appearance;
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        fifthView.navigationController.navigationBar.scrollEdgeAppearance = appearance;
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        NSArray* arrayViewController = [NSArray arrayWithObjects: navigationFirst, navigationSecond, navigationThird, navigationFourth, navigationFifth, nil];
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        UITabBarController* tabBarViewController = [[UITabBarController alloc] init];
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        tabBarViewController.viewControllers = arrayViewController;
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        // 在tabBar上方添加自定义覆盖视图
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        UIView* overlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 50, WIDTH, tabBarViewController.tabBar.bounds.size.height)];
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        overlayView.backgroundColor = [UIColor blackColor];
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        overlayView.tag = 1001;
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        [tabBarViewController.tabBar addSubview:overlayView];
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        [tabBarViewController.tabBar bringSubviewToFront:overlayView];
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        tabBarViewController.modalPresentationStyle = UIModalPresentationFullScreen;
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        [self presentViewController: tabBarViewController animated: YES completion: nil];
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    }
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}
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#### 自动收起键盘
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```objective-c
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- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
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    [self.view endEditing:YES];
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}

这两个方法笔者暂时也不算很清楚讲述，只算一知半解，只知道能实现这个功能

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- (void)keyboardWillAppear:(NSNotification *)notification{
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    CGRect keyboardFrame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
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    CGFloat keyboardY = keyboardFrame.origin.y;
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    [UIView animateWithDuration:0.3 animations:^{
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        self.view.transform = CGAffineTransformMakeTranslation(0, keyboardY - self.view.frame.size.height + 20);
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    }];
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}
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- (void)keyboardWillDisAppear:(NSNotification *)notification{
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    [UIView animateWithDuration:0.3 animations:^{
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        self.view.transform = CGAffineTransformIdentity;
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    }];
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}
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#### 注册
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核心代码如下
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```objective-c
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-(void) pressConfirm {
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    NSString *username = self.usernameTextField.text;
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    NSString *password = self.passwordTextField.text;
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    UserManager *userManager = [UserManager sharedManager];
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    if (username.length == 0 || password.length == 0) {
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        UIAlertController* warning = [UIAlertController alertControllerWithTitle:@"提示"
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                                                                         message:@"账号或密码不能为空"
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                                                                  preferredStyle:UIAlertControllerStyleAlert];
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        UIAlertAction* warn = [UIAlertAction actionWithTitle:@"确定"
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                                                       style:UIAlertActionStyleDefault
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                                                     handler:nil];
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        [warning addAction:warn];
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        [self presentViewController:warning animated:YES completion:nil];
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        return;
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    }
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    // 检查密码长度是否大于6位
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    if (password.length < 6) {
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        UIAlertController* warning = [UIAlertController alertControllerWithTitle:@"提示"
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                                                                         message:@"密码长度必须大于6位"
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                                                                  preferredStyle:UIAlertControllerStyleAlert];
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        UIAlertAction* warn = [UIAlertAction actionWithTitle:@"确定"
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                                                       style:UIAlertActionStyleDefault
49
                                                     handler:nil];
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        [warning addAction:warn];
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        [self presentViewController:warning animated:YES completion:nil];
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        return;
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    }
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    // 检查用户名是否已存在
57
    if ([userManager.usernames containsObject:username]) {
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        UIAlertController* warning = [UIAlertController alertControllerWithTitle:@"提示"
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                                                                         message:@"该用户名已被注册"
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                                                                  preferredStyle:UIAlertControllerStyleAlert];
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        UIAlertAction* warn = [UIAlertAction actionWithTitle:@"确定"
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                                                       style:UIAlertActionStyleDefault
64
                                                     handler:nil];
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        [warning addAction:warn];
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        [self presentViewController:warning animated:YES completion:nil];
67
        return;
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    }
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    // 所有检查通过，注册新用户
71
    [userManager.usernames addObject:username];
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    [userManager.passwords addObject:password];
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    [userManager saveUserData]; // 保存到磁盘
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    // 显示注册成功提示
76
    UIAlertController* successAlert = [UIAlertController alertControllerWithTitle:@"注册成功"
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                                                                         message:@"您已成功注册"
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                                                                  preferredStyle:UIAlertControllerStyleAlert];
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    UIAlertAction* okAction = [UIAlertAction actionWithTitle:@"确定"
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                                                       style:UIAlertActionStyleDefault
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                                                     handler:^(UIAlertAction * _Nonnull action) {
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        // 关闭注册页面
84
        [self dismissViewControllerAnimated:YES completion:nil];
85
    }];
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    [successAlert addAction:okAction];
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    [self presentViewController:successAlert animated:YES completion:nil];
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    // 清空输入框
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    self.usernameTextField.text = @"";
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    self.passwordTextField.text = @"";
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    self.emailTextField.text = @"";
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}

HomeVC#

因为文章的格式类似如图，我新建了一个cell用于设置所有类似的页面，textTableViewCell

首页中，我们需要在点击假日时跳转到另一个页面，同时实现两个页面之间的点赞同步。

先来说说推出假日页面。

我在texttableView中添加了一个手势识别

1
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]
2
                                                    initWithTarget:self
3
                                                    action:@selector(CellTap)];
4
                [self.contentView addGestureRecognizer:tapGesture];

1
- (void)CellTap {
2
    if ([self.delegate respondsToSelector:@selector(textTableViewCellDidTap:)]) {
3
        [self.delegate textTableViewCellDidTap:self];
4
    }
5
}

在首页中：我们只处理第一行的情况

1
- (void)textTableViewCellDidTap:(textTableViewCell *)cell {
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    NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
3
    if (indexPath.section == 1 && indexPath.row == 0) {
4
        NSMutableDictionary *holidayData = [self.dataArray[0] mutableCopy];
5

6
        HolidayDetailViewController *detailVC = [[HolidayDetailViewController alloc] init];
7
        detailVC.holidayData = holidayData;
8
        detailVC.delegate = self;
9
        detailVC.isLiked = [holidayData[@"isLiked"] boolValue]; // 传递当前点赞状态
10

11
        // 推入导航栈
12
        [self.navigationController pushViewController:detailVC animated:YES];
13
    }
14
}

再来说说点赞。

其实下图中的方法更为简便

列表页点赞： textTableViewCell (按钮点击) → FirstVC (更新数据源) → 刷新UI

详情页点赞： HolidayDetailViewController → FirstVC (通过代理回调) → 更新数据源刷新列表页单元格

我单独有一篇博客讲解这部分：

细说3Gshare 项目中的点赞双向传值-CSDN博客

SearchVC#

搜索大白时，推出页面。

1
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
2
    if ([self.searchBar.text isEqualToString:@"大白"]) {
3
        SearchResultViewController* searchResultsView = [[SearchResultViewController alloc] init];
4
        [self.navigationController pushViewController: searchResultsView animated: YES];
5
    }
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}

还有一部分是上传页面

实现效果如图。两个textField用来输入作品名称和文章内容

上传图片：#

一个choosePhoto按钮用来弹出照片墙，另一个numbersOfPhotolabel用来显示选中的照片数量。如上文示范图。

1
- (void)pressChoosePhotoButton {
2
    PhotoWallViewController* photoWallViewController = [[PhotoWallViewController alloc] init];
3
    photoWallViewController.delegate = self;
4
    [self.navigationController pushViewController: photoWallViewController animated: YES];
5
}

1
- (void)pressPhoto: (UIButton*)button {
2
    if (button.selected == NO) {
3
        int selectNumber = (int)(button.tag - 100);
4
        self.numbersOfPhoto++;
5
        [self.imageNameArray addObject: [NSString stringWithFormat: @"photo%d.jpg", selectNumber]];
6
        button.selected = YES;
7
    } else {
8
        int selectNumber = (int)(button.tag - 100);
9
        self.numbersOfPhoto--;
10
        [self.imageNameArray removeObject: [NSString stringWithFormat: @"photo%d.jpg", selectNumber]];
11
        button.selected = NO;
12
    }
13
}

1
UIAlertAction* boomAction= [UIAlertAction actionWithTitle: @"确定" style: UIAlertActionStyleDefault handler: ^(UIAlertAction *action) {
2
            // 返回前调用代理方法
3
            if ([self.delegate respondsToSelector:@selector(changedPhotoName:andNumber:)]) {
4
                [self.delegate changedPhotoName:self.imageNameArray.firstObject andNumber:self.numbersOfPhoto];
5
            }
6
            [self.navigationController popViewControllerAnimated: YES];
7
        }];
8
        [boomAlert addAction: boomAction];
9
        [self presentViewController: boomAlert animated:YES completion:nil];

注意，在这里我们传回来的是数组的第一个元素

1
- (void)changedPhotoName:(NSString *)nameOfPhoto andNumber:(int)numbersOfPhoto {
2
    self.numbersOfPhoto = numbersOfPhoto;
3
    if (nameOfPhoto) {
4
        [self.choosePhoto setBackgroundImage:[UIImage imageNamed:nameOfPhoto] forState:UIControlStateNormal];
5
        [self.choosePhoto setTitle:@"" forState:UIControlStateNormal];
6
    }
7

8
    //更新图片数量标签
9
    self.numbersOfPhotoLabel.text = [NSString stringWithFormat:@"%d", numbersOfPhoto];
10
    self.numbersOfPhotoLabel.hidden = (numbersOfPhoto == 0);
11
}

在发布页面修改照片数量，同时修改那个背景。效果如下：

ArticleVC#

直接注册三个一模一样的cell，以实现互不干涉。古老简单但是有效

1
- (void)setupTableViews {
2
    CGFloat tableHeight = HEIGHT - 150;
3

4
    self.tableView01 = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, tableHeight) style:UITableViewStylePlain];
5
    self.tableView01.delegate = self;
6
    self.tableView01.dataSource = self;
7
    self.tableView01.backgroundColor = [UIColor whiteColor];
8
    self.tableView01.showsVerticalScrollIndicator = NO;
9
    self.tableView01.separatorStyle = UITableViewCellSeparatorStyleNone;
10

11
    self.tableView02 = [[UITableView alloc] initWithFrame:CGRectMake(WIDTH, 0, WIDTH, tableHeight) style:UITableViewStylePlain];
12
    self.tableView02.delegate = self;
13
    self.tableView02.dataSource = self;
14
    self.tableView02.backgroundColor = [UIColor whiteColor];
15
    self.tableView02.showsVerticalScrollIndicator = NO;
16
    self.tableView02.separatorStyle = UITableViewCellSeparatorStyleNone;
17

18
    self.tableView03 = [[UITableView alloc] initWithFrame:CGRectMake(WIDTH * 2, 0, WIDTH, tableHeight) style:UITableViewStylePlain];
19
    self.tableView03.delegate = self;
20
    self.tableView03.dataSource = self;
21
    self.tableView03.backgroundColor = [UIColor whiteColor];
22
    self.tableView03.showsVerticalScrollIndicator = NO;
23
    self.tableView03.separatorStyle = UITableViewCellSeparatorStyleNone;
24

25
    // 注册cell
26
    [self.tableView01 registerClass:[textTableViewCell class] forCellReuseIdentifier:@"cell"];
27
    [self.tableView02 registerClass:[textTableViewCell class] forCellReuseIdentifier:@"cell"];
28
    [self.tableView03 registerClass:[textTableViewCell class] forCellReuseIdentifier:@"cell"];
29

30
    [self.scrollView addSubview:self.tableView01];
31
    [self.scrollView addSubview:self.tableView02];
32
    [self.scrollView addSubview:self.tableView03];
33
}
34

35
- (void)createArticles {
36
    UIImage *defaultImage = [UIImage systemImageNamed:@"photo"];
37

38
    self.articlesSection0 = [NSMutableArray arrayWithArray:@[
39
        @{@"thumbnail": [UIImage imageNamed:@"article1"] ?: defaultImage, @"title": @"如期而至", @"author": @"SHARE 钢蛋", @"category": @"", @"time": @"16", @"isLiked": @NO},
40
        @{@"thumbnail": [UIImage imageNamed:@"article2"] ?: defaultImage, @"title": @"duck的学问", @"author": @"SHARE 王二麻", @"category": @"", @"time": @"20", @"isLiked": @NO},
41
        @{@"thumbnail": [UIImage imageNamed:@"article3"] ?: defaultImage, @"title": @"您的故事", @"author": @"SHARE 和尚", @"category": @"", @"time": @"25", @"isLiked": @NO},
42
        @{@"thumbnail": [UIImage imageNamed:@"article4"] ?: defaultImage, @"title": @"八月的故事", @"author": @"SHARE 二五", @"category": @"", @"time": @"60", @"isLiked": @NO},
43
        @{@"thumbnail": [UIImage imageNamed:@"article5"] ?: defaultImage, @"title": @"我们终将再见", @"author": @"SHARE 小唐", @"category": @"", @"time": @"60", @"isLiked": @NO}
44
    ]];
45

46
    self.articlesSection1 = [self.articlesSection0 mutableCopy];
47
    self.articlesSection2 = [self.articlesSection0 mutableCopy];
48
}

MyVC#

我的信息#

评论 && 活动通知 && 我的推荐#

这段代码我也没有很懂，只知道能实现一个类似这样的效果

1
UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:@"没有新内容" preferredStyle:UIAlertControllerStyleAlert];
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        [self presentViewController:alert animated:YES completion:nil];
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        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
4
            [alert dismissViewControllerAnimated:YES completion:nil];
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        });

新关注的#

这部分需要实现一个关注的留存如下图

通过如下方式可以确保只创建一个followVC，进而保存之前的关注。

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@property (nonatomic, strong) followViewController *followVC;
2

3

4
else if ([messageType isEqualToString:@"新关注的"]) {
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        // 使用强引用确保只创建一次 followViewController
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        if (!_followVC) {
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            _followVC = [[followViewController alloc] init];
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            _followVC.title = @"关注列表";
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            _followVC.view.backgroundColor = [UIColor whiteColor];
10
        }
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        [self.navigationController pushViewController:_followVC animated:YES];
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##### 私信：
13

14

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首先要隐藏tabBar
16

17

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```objective-c
19
// 隐藏tabBar
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- (void)viewWillAppear:(BOOL)animated {
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    [super viewWillAppear:animated];
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    self.tabBarController.tabBar.hidden = YES;
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}
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// 恢复tabBar
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- (void)viewWillDisappear:(BOOL)animated {
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    [super viewWillDisappear:animated];
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    self.tabBarController.tabBar.hidden = NO;
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}

1
- (void)setupMessages {
2
    _messageArray = [NSMutableArray array];
3
    _rowHeightArray = [NSMutableArray array];
4

5
    [self addMessage:@"1" isOutgoing:NO];
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    [self addMessage:@"2" isOutgoing:YES];
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    [self addMessage:@"3" isOutgoing:NO];
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    [self addMessage:@"4" isOutgoing:YES];
9
    [self addMessage:@"5" isOutgoing:NO];
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    [self addMessage:@"6" isOutgoing:YES];
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    [self addMessage:@"7" isOutgoing:YES];
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    [self scrollToBottom];
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}

这段代码是我设置的初始聊天，isoutgoing属性用来表示是发送还是接收，实现信息的交替出现

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- (void)addMessage:(NSString *)message isOutgoing:(BOOL)isOutgoing {
2
    NSDictionary *messageDict = @{
3
        @"text": message,
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        @"outgoing": @(isOutgoing)
5
    };
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    [_messageArray addObject:messageDict];
7

8
    NSDictionary *attri = @{NSFontAttributeName: [UIFont systemFontOfSize:16]};
9
    /*
10
     boundingRectWithSize:... 是 NSString 的一个方法
11
     你告诉他最大容纳的尺寸 会帮你计算出这段字符串在这些限制下需要多大的空间
12
    */
13
    CGSize size = [message boundingRectWithSize:CGSizeMake(WIDTH * 0.6, CGFLOAT_MAX)
14
                                       options:NSStringDrawingUsesLineFragmentOrigin
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                                    attributes:attri
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                                       context:nil].size;
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    CGFloat height = MAX(60, size.height + 40);
18
    [_rowHeightArray addObject:@(height)];
19
}

1
- (void)sendMessage {
2
    if (self.textField.text.length == 0) return;
3

4
    [self addMessage:self.textField.text isOutgoing:self.isNextOutgoing];
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    self.isNextOutgoing = !self.isNextOutgoing; //实现交替发送
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    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:self.messageArray.count - 1 inSection:0];
7
    [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationBottom];
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    /*
9
     直接到底部
10
     */
11
    [self scrollToBottom];
12
    self.textField.text = @"";
13
}
14

15
- (void)scrollToBottom {
16
    if (self.messageArray.count > 0) {
17
        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:self.messageArray.count - 1 inSection:0];
18
        [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
19
        /*
20
         取出最后一条消息然后直接滚动到该条消息处
21
         */
22
    }
23
}
24

25
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
26
    return self.messageArray.count;
27
}
28

29
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
30
    MessageTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MessageCell" forIndexPath:indexPath];
31
    NSDictionary *message = self.messageArray[indexPath.row];
32
    [cell configureWithText:message[@"text"] isOutgoing:[message[@"outgoing"] boolValue]];
33
    return cell;
34
}
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### 设置
36

37

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基本资料需要保存之前修改后的男女性别 不能人家改成女的推出去以后又成男的了
39

40

41
还是以前那个方法，只创建一次
42

43

44
```objective-c
45
- (void)showBasicInfo {
46
    if (!_basicsVC) {
47
            _basicsVC = [[basicsViewController alloc] init];
48
            _basicsVC.view.backgroundColor = [UIColor whiteColor];
49
        }
50
        [self.navigationController pushViewController:_basicsVC animated:YES];
51
}

Tips：#

1
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone; // 移除分隔线

这个代码可以用来移除cell间的分界线

1
UIBarButtonItem* btn = [[UIBarButtonItem alloc] initWithImage: [UIImage imageNamed: @"holidayfanhui.png"] style: UIBarButtonItemStylePlain target: self action: @selector(pressReturn)];
2
    self.navigationItem.leftBarButtonItem = btn;
3
    btn.tintColor = [UIColor whiteColor];
4

5

6
- (void)pressReturn {
7
    [self.navigationController popViewControllerAnimated: YES];
8
}

这段代码可以用来自定义返回键类

1
// 在tabBar上方添加自定义覆盖视图
2
        UIView* overlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 50, WIDTH, tabBarViewController.tabBar.bounds.size.height)];
3
        overlayView.backgroundColor = [UIColor blackColor];
4
        [tabBarViewController.tabBar addSubview:overlayView];

这个代码可以实现遮挡tabBar和屏幕底部之间的区域，更加美观，当然如果为了更加自然可以自己调颜色。

原文发布于 CSDN：iOS —— 3Gshare项目总结与思考