建立自己的TabBarController,继承UITabBarController

Paste_Image.png

MyTabBarController.m

- (void)viewDidLoad {  
    [super viewDidLoad];  
    // 使用系统自带的tabBar注意这两个函数的先后顺序  
    [self createViewControllers];  
    [self createMyTabBarItem];  
}

- (void)btnClick:(UIButton *)sender {  
    // 设置视图切换  
    NSInteger index = sender.tag-100;  
    self.selectedIndex = index;  
  
    for (UIView * view in self.tabBar.subviews) {  
        // 要判断view的类型  
        if ([view isKindOfClass:[UIButton class]]) {  
            UIButton * btn = (UIButton *)view;  
            if (btn.tag == sender.tag) {  
                btn.selected = YES;  
            } else {  
                btn.selected = NO;  
            }  
        }  
    }  
    /* 
     self.tabBar.subviews.count = 5; 
     self.tabBar.subviews: 
     ( 
     "<_UITabBarBackgroundView: 0x7fc513ff48c0; frame = (0 0; 375 49); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x7fc513ff4c40>>", 
     "<UIButton: 0x7fc513e238e0; frame = (56.25 0; 50 49); opaque = NO; tag = 100; layer = <CALayer: 0x7fc513e23d40>>", 
     "<UIButton: 0x7fc513fda4b0; frame = (162.5 0; 50 49); opaque = NO; tag = 101; layer = <CALayer: 0x7fc513fda6d0>>", 
     "<UIButton: 0x7fc513fe4520; frame = (268.75 0; 50 49); opaque = NO; tag = 102; layer = <CALayer: 0x7fc513fe1920>>", 
     "<UIImageView: 0x7fc513ff5ab0; frame = (0 -0.5; 375 0.5); autoresize = W; userInteractionEnabled = NO; layer = <CALayer: 0x7fc513ff5720>>" 
     ) 
     */  
} 

- (void)createViewControllers {  
    NSMutableArray * viewControllers = [[NSMutableArray alloc] init];  
//    NSArray * classNames = @[@"MovieViewController",@"CinemaViewController",@"SettingViewController"];  
//    for (NSInteger i=0; i<classNames.count; i++) {  
//        //将字符串表示的类名转换为类（对象）  
//        Class class = NSClassFromString(classNames[i]);  
//        BaseViewController * bVC = [[class alloc] init];  
//          
//        UINavigationController * nav = [[UINavigationController alloc] initWithRootViewController:bVC];  
//        [viewControllers addObject:nav];  
//  
//    }  
      
    MovieViewController * MVC = [[MovieViewController alloc] init];  
    [MVC becomeObserve];  
    UINavigationController * Mnav = [[UINavigationController alloc] initWithRootViewController:MVC];  
    [viewControllers addObject:Mnav];  
      
    CinemaViewController * CVC = [[CinemaViewController alloc] init];  
    [CVC becomeObserve];  
    UINavigationController * Nnav = [[UINavigationController alloc] initWithRootViewController:CVC];  
    [viewControllers addObject:Nnav];  
      
    SettingViewController * SVC = [[SettingViewController alloc] init];  
    UINavigationController * Snav = [[UINavigationController alloc] initWithRootViewController:SVC];  
    [viewControllers addObject:Snav];  
      
    self.viewControllers = viewControllers;  
  
}