Touching in UIScrollview?
I am using ScrollviewDelegate
Protocol in viewcontroller, but I am using Custom
UIView(UIImageview)
in that custom view.
For some reason, touchMoved开发者_如何学Go
is not being called. Does anyone have any ideas why this is (not) happening?
If scrolling in UIScrollView is enabled then touchMoved
events are not propagated to the scroll view contents. How to workaround that depends on what you want to achieve. In my application I needed just to drag an object inside UIScrollView
and I did the following in contentsView touch handlers for that:
- In touchesBegan: event I checked if I tapped object to be dragged. If YES - then disabled scrolling in UIScrollView
- Then as scrolling was disabled my contents view started to receive
touchesMoved
event and I could "drag" my object there. - In
touchesEnded:
I reenabled scrolling.
If you want something more complex you can subclass UIScrollView and try to override its touch handlers (see also hitTest:withEvent:
method)
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