当用于UITabBarController的ViewController实现loadView时，setBackgroun

Question

我有一个在appDelegate中使用的视图控制器。作为tabBarController 的一部分

(代码剪辑如下)

 self.window=[[UIWindow alloc ]initWithFrame:[[UIScreen mainScreen]bounds]];
   UITabBarController *baseTab=[[UITabBarController alloc] init];
   self.feedViewController=[[FeedViewController alloc] init];
self.favViewController=[[FavViewController alloc] init];
    [baseTab.tabBar setTintColor:[UIColor yellowColor] ];
    [baseTab setViewControllers:@[self.feedViewController,self.favViewController]animated:YES];

feedViewController内的代码张贴在下面，应用程序崩溃是解决当我删除loadView从下面的实现

-(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self=[super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if(self)
    {
        [self setTitle:@"Feed"];

    }
    return  self;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self.view setBackgroundColor:[UIColor blueColor]];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
-(void)loadView
{
}

请告诉我为什么会这样

Answer 1

在load view中调用super method

-(void)loadView { [super loadView]; }

希望这对你有帮助，祝你好运