Drag a UIView on the bounds of another UIView (with a rounded corner)

Question

Basically I have a UIView which I need to drag along the bounds of another UIView (its superview) with a rounded corner. I have already implemented a draggable UIView. I'm having trouble finding a way to restrict the movement of the draggable UIView along the edges of its superview only.

Is there a way in which I can check if the UIView.center is on the superview's bounds?

Anyone have any ideas on how I can implement this? Thanks

might be possible duplicate http://stackoverflow.com/questions/6501073/how-to-test-if-a-point-is-in-a-view — harsha yarabarla, Nov 16 '15 at 12:30

score 1 · Answer 1 · answered Nov 16 '15 at 12:31

1

You can use the CGRectContainsPoint to check whether an point is inside the view frame

-(void) methodThatWouldBeCalledWhenTheViewISDragged {

  CGPoint smallViewCenter = smallView.center;
    if ( CGRectContainsPoint(containerView.bounds, smallViewCenter) ) {
       // smallView is inside the ContainerView
    }
    else{   
       //smallView went outside
    }
  }

answered Nov 16 '15 at 12:31

ipraba

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I only want the smallView to be draggable on the outside edge of the containerView. I don't want it to be able to be dragged inside. – James Nov 17 '15 at 06:27

score 0 · Answer 2 · answered Nov 16 '15 at 12:29

0

UseCGRectContainsPoint() to detect.

answered Nov 16 '15 at 12:29

duan

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Drag a UIView on the bounds of another UIView (with a rounded corner)

2 Answers2