查看离开视图边界

Question

我有一个背景视图（UIImageView），我添加一个视图（UIView）。 这个contentView（UIView）包含UIPanGestureRecognizer。

我给UIPanGestureRecognizer到内容查看贝娄代码：

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(movePhoto:)]; 
[panRecognizer setMinimumNumberOfTouches:1]; 
[panRecognizer setDelegate:self]; 
[contentView addGestureRecognizer:panRecognizer]; 
[panRecognizer release]; 

然后我加入这个内容查看到后台视图（的UIImageView）由娄代码：

[imgBG addSubview:contentView]; // here imgBG is Background view. 

但是当我提出这个contentView会从imgBG中退出。

波纹管是将内容查看

[[[(UITapGestureRecognizer*)sender view] layer] removeAllAnimations]; 

[self.view bringSubviewToFront:[(UIPanGestureRecognizer*)sender view]]; 
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view]; 

if([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) 
{ 
    firstX = [[sender view] center].x; 
    firstY = [[sender view] center].y; 
} 
translatedPoint = CGPointMake(firstX+translatedPoint.x, firstY+translatedPoint.y); 
[[sender view] setCenter:translatedPoint]; 

CGFloat finalX = [sender view].center.x; 
CGFloat finalY = [sender view].center.y; 
[[sender view] setCenter:CGPointMake(finalX, finalY)]; 

我想方法，这里的内容查看仍应imgBG内，因为它是imgBG的子视图。

请让我知道我的代码是否存在问题，或者是由于UIPanGestureRecognizer引起的问题。

在此先感谢。

Answer 1

我只是不得不做：

[imgBG setClipsToBounds:YES];