ios - UIView中如何设置SubView的优先响应

Question

在视图控制器中：

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSArray *array = [[NSArray alloc]initWithObjects:@"title1",@"title2",@"title3", nil];
    self.scrollTabControl = [[ScrollTabControl alloc]initWithViewControllers:array];
    [self.view addSubview:self.scrollTabControl]; //add a view to ViewController}

@interface ScrollTabControl : UIView
- (id)initWithControllers:(NSArray *)controllers
{
    if((self = [super init])) {
        _viewControllers = viewControllers;
        _tabControls = [[TabControl alloc] initWithControllers:viewControllers];
        [self addSubview:_tabControls];//initialization tab controler,in it,set UIControlEventTouchUpInside of button,response selector
    }
    return self;
}

现在，问题是如果我直接在视图控制器中使用 [self addSubView:TabControl]，选择器将正确实现。但是如果我 [self addSubView:ScrollTabControl]，按钮事件不会触发选择器，选择器也没有响应。我该如何处理这种情况？