UIScrollview 触摸
我有一个 UIScrollView 实例，允许用户放大/缩小。我已经根据文档实现了一个委托来处理这个问题。但是，我想知道用户触摸滚动视图的位置（相对于滚动视图的超级视图的框架）。我可以拦截此信息，例如通过滚动视图的某些属性，而不覆盖 touchesMoved:withEvent: 吗？
[UIScrollView 实例在内部根据它们收到的触摸类型做出决定。我不想模仿这个，我想知道这个决定和触摸的位置。]
I have an instance of UIScrollView which I'm allowing the user to zoom in/out. I've implemented a delegate to take care of this as per the docs. However, I'd like to know where the user is touching the scrollview (relative to the scrollview's superview's frame). Can I intercept this information, such as via some property of scrollviews, without overriding say touchesMoved:withEvent:?
[UIScrollView instances internally make a decision on the type of touch they received. I don't want to emulate this, I'd like to know the decision and the location of the touch.]
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滚动视图中没有任何属性可以告诉您触摸的位置。您可以知道它是否被拖动或滚动，但您无法知道触摸的位置。如果您对子类化
UIScrollView犹豫不决，您可以查看自定义UIGestureRecognizer，它将帮助您跟踪当前位置。获得UITouch对象后，您可以使用locationInView:方法获取相对于超级视图的点击位置。There is no property in scroll view which will tell you the location of the touch. You can know if it's being dragged or scrolled but you won't have the location of the touch. If you are hesitant about subclassing
UIScrollView, you can look at a customUIGestureRecognizerwhich will help you keep track of the current location. Once you have theUITouchobject, you can get the location of the tap relative to superview using thelocationInView:method.