在iPhone中触摸UIScroll视图中的事件 [英] Touch Events in UIScroll View in iPhone

问题描述

我在视图控制器中创建了滚动视图，并在滚动视图中设置了按钮。我已经设置了两个图像之间的滚动视图。按钮水平滚动。现在我想启用和禁用图像。例如：最初左侧的图像将被隐藏，一旦水平移动按钮并启用右键并隐藏左按钮。

我如何为滚动视图？

   - （void）touchesBegan：（NSSet *）触摸与事件：（UIEvent *）事件{
 NSLog（@ImagePressed）; 
} 
  

如果我在我的应用程序中使用了这种方法。但是这个方法是不叫的。那么当我点击滚动视图时，我如何写出触摸事件。如果我得到触摸事件，那么只有我可以启用和禁用图像。所以请帮帮我吗？

看到我的图像，（我已经设置了两个图像（左箭头和右箭头图像））。

我已经在图像视图中设置了两个图像，我已经将滚动视图设置为自定义视图的子视图（滚动视图不是视图控制器的子视图）。

  UIImageView * leftImg; 
 
 UIImageView * rightImg; 
  

谢谢！

解决方案

我相信你想做什么可以通过为您的 UIScrollView 设置委托来实现。
您的视图控制器可以实现 UIScrollViewDelegate 方法，如

 （void）scrollViewDidScroll：（UIScrollView *）sender 
  - （void）scrollViewDidEndDragging：（UIScrollView *）scrollView willDecelerate（（BOOL））减速
  / pre> 
 
 
和
  （void）scrollViewDidEndDecelerating :( UIScrollView *）scrollView 
  
并通过检查 contentOffset 属性在滚动视图。
 
I have created scroll view in my view controller and set the buttons in the scroll view. I have set the scroll view between the two images. The buttons are scrolling horizontally. Now i want to enable and disable the images. For Eg: Initially left images are to be hidden, once moving the button horizontally and enable right button and hidden the left button.

How can i write the touch events for the scroll view?.
   - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
         NSLog(@"ImagePressed");
      }
If i have used this method in my application. But the methods are doesn't called. SO how can i write the touch events when i clicks the scroll view. If i get the touch events, then only i could enable and disable the images. so please help me out?

See my images, (I have set the two images(left arrow and right arrow images)).

I have set the two images in the imageview and I have set the scroll view as subview for the custom view.(Scroll view is not subview for view controller).
UIImageView *leftImg;

UIImageView *rightImg;




Thanks!
解决方案
I believe what you want to do can be achieved by setting a delegate for your UIScrollView.
Your view controller could implement UIScrollViewDelegate methods like  
- (void)scrollViewDidScroll:(UIScrollView *)sender
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
And
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
and respond appropriately by checking the contentOffset property on the scroll view.

                        
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