CODEWITHSUNDEEP
iphoneios
user141302
user141302

Reputation:

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 is not being called. Does anyone have any ideas why this is (not) happening?

Upvotes: 3

Views: 364

Answers (1)

Vladimir
Vladimir

Reputation: 170839

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:

  1. In touchesBegan: event I checked if I tapped object to be dragged. If YES - then disabled scrolling in UIScrollView
  2. Then as scrolling was disabled my contents view started to receive touchesMoved event and I could "drag" my object there.
  3. 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)

Upvotes: 7

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