子視圖中的UIButton不響應使用objective-c觸摸事件

我想創建一個底部的選項卡，用戶按下時可以更改視圖。子視圖中的UIButton不響應使用objective-c觸摸事件

要做到這一點我創建視圖控制器的視圖，並設置它在init

這裏框底部面板視圖控制器

@implementation BottomTabViewController 

-(id) initWithFrame:(CGRect)frame{ 
    if(self = [super init]){ 
     self.view.frame = frame; 
     return self; 
    }else{ 
     return nil; 
    } 
} 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    [self setUpButtons]; 
    // Do any additional setup after loading the view. 
} 

-(void) featureBtnClick:(id*) sender{ 
    NSLog(@"featureBtn Clicked"); 
} 

-(void) favBtnClick:(id*)sender{ 
    NSLog(@"Fav Btn Clicked"); 
} 

-(void) setUpButtons{ 
    UIButton *features = [[UIButton alloc]initWithFrame:CGRectMake(10, 10, 50, 50)]; 
    [features setBackgroundImage:[UIImage imageNamed:@"feature.png"] forState:UIControlStateNormal]; 
    features.backgroundColor = [UIColor greenColor]; 

    [features addTarget:self action:@selector(featureBtnClick:) forControlEvents:UIControlEventTouchUpInside]; 
    [self.view addSubview:features]; 

    UIButton *favBtn = [[UIButton alloc]initWithFrame:CGRectMake([[UIScreen mainScreen]bounds].size.width - 100, 10, 50, 50)]; 
    [favBtn setBackgroundImage:[UIImage imageNamed:@"favorite.png"] forState:UIControlStateNormal]; 
    [favBtn addTarget:self action:@selector(favBtnClick:) forControlEvents:UIControlEventTouchUpInside]; 
    favBtn.backgroundColor = [UIColor greenColor]; 

    [self.view addSubview:favBtn]; 

} 


@end

我補充說，我有這樣的代碼視圖：

-(void) setUpBottom{ 

    BottomTabViewController *botm = [[BottomTabViewController alloc]initWithFrame:CGRectMake(0, [[UIScreen mainScreen] bounds].size.height - 55, [[UIScreen mainScreen]bounds].size.width, 55)]; 
    botm.view.backgroundColor = [UIColor redColor]; 
    // botm.view.userInteractionEnabled = false; 
    botm.view.userInteractionEnabled = true; 
    [self.view addSubview:botm.view]; 
}

這裏這裏的結果似乎，注意工作，以及非常愚蠢的底部面板，但它顯示了：

但是，當按下左右按鈕時，沒有打印日誌，它預計會指示該按鈕有效，我做了什麼錯了？謝謝