UIButton的加入到UIButton的不響應到選擇

Question

我已經添加了UI按鈕，一個按鈕disclouser

而實現的選擇方法

但動作選擇不向按鈕爲什麼和如何應對做

//To add a discloser button to show route map 
UIButton *detailBtn=[UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
pinView.leftCalloutAccessoryView=detailBtn; 
[detailBtn addTarget:self action:@selector(showRoute:) forControlEvents:UIControlEventTouchUpInside]; 
DisplayMap *ann=(DisplayMap *)annotation; 
detailBtn.tag = ann.detailButtonTag; 


UIButton *btnOnPopup=[[UIButton alloc] initWithFrame:CGRectMake(- 207, -6, 300, 43)]; 
btnOnPopup.backgroundColor = [UIColor whiteColor]; 
[btnOnPopup addTarget:self action:@selector(showRoute2:) forControlEvents:UIControlEventTouchUpInside]; 
btnOnPopup.tag = ann.detailButtonTag; 
btnOnPopup.userInteractionEnabled = YES; 
[detailBtn insertSubview:btnOnPopup aboveSubview:detailBtn]; 

選擇

[btnOnPopup addTarget:self action:@selector(showRoute2:) forControlEvents:UIControlEventTouchUpInside]; 

（第二個按鈕btnOnPopup）不起作用。

Answer 1

您的btnOnPopup不在detailBtn的界限內，所以觸摸甚至不會達到它。無論如何，向按鈕添加按鈕並不是一個很好的練習。將它添加到一個按鈕的上海華可能是一個更好一點（和會讓你接觸的工作，但你可能需要調整幀），而不是

[detailBtn.superview insertSubview:btnOnPopup aboveSubview:detailBtn]; 

Answer 2

添加視圖，然後點擊手勢識別按鈕：

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureHandler:)]; 
[singleTap setNumberOfTapsRequired:1]; 
[view addGestureRecognizer:singleTap]; 

...

[detailBtn addSubview:view]; 

...

- (void)tapGestureHandler:(UIGestureRecognizer *)gestureRecognizer 
{ 
    // your code for tap handler is here 
}