Touch Detection in subviews

Question

我有一个视图，其中有一个滚动视图。我想检测触摸开始，移动等方法。我使用了这些方法。这些方法在滚动视图外部工作正常，但在滚动视图内部无效。告诉我为什么无法正常工作，解决方案是什么。

Answer 1

You have to Subclass UIView (as MyUIView)and Implement the touch delegate.

Then Add MyUIView to UIScrollView

Eg:

   @interface MyUIView : UIViewController {

   }
   @end

  @implementation MyUIView

      //implement touch delegate here
   }

Add this line in your main view

MyUIView *myUIView = [[MyUIView alloc] init];
myUIView.userIntarctionEnabled = YES;
[yourScrollView addSubView:myUIView.view];

Note : you can use UIGustures instead of sub-classing. The UIGestureRecognizer class is available to help with detecting and responding to the various UI gestures common on iOS devices

Answer 2

使用convertPoint: toView:方法。

CGPoint *point = [yourView convertPoint:touchPoint toView:yourScrollView];