I have two UIScrollViews that I move images between. The user can drag and forth between the scroll views. I am trying to animate the movement of the image from one scroll view to another. In -touchesMoved
(handled in my UIViewController which has two custom UIScrollViews that intercept touch and sends to my UIViewController), I am trying to set the "center" of my UIImageView that is being moved. As it is moved, the image gets hidden behind the UIScrollView and not visible. How do I make it appear on top of the UIScrollView? I am able to handle the -touchesEnded
properly by animating in the destination scroll view.
I am also confused about -convertPoint:fromView:
usage in the iPhone Programming Guide (See Chapter 3, Event Handling). If the touch coordinates are in window coordinates, to change my view (UIImageView inside a UIScrollView which is inside a UIView and inside a window) center don't I have to use -convertPoint:toView:
, i.e.,
imageView.center = [self.view.window convertPoint:currentTouchPosition toView:imageView];
What am I missing?
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You can use the method - (void)bringSubviewToFront:(UIView *)view for making the image view the front most view.
Johan
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Hi,
That did not seem to work. I see the above API used in SiesmicXML (Apple reference) trying to keep the earthquake image above everything in a tableview Cell. Somehow it did not work for me.
Thanks mohan
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It depends on how you structured your views. If both scrollviews and the imageview are at the same level, it should work. If the imageview is a subview of one of the scrollviews, you can try bringing the scrollview to the front. That way also the imageview will be drawn over the other scrollview.
Johan
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Hi,
I have a View Controller with two ScrollViews. Images are added as subviews. ScrollViews are already in the front. I tried bringing scrollview to the front and also imageview of the scrollview to the front. But somehow when i drag, the center of the image goes over my other scrollview2 which i also tried sending back. But does not seem to work. Here is what i do, in TouchesMove (inside a ViewController)
view= [[scrollView1 subviews] objectAtIndex:currentImageIndex];
[self.view bringSubviewToFront:scrollView1];
[scrollView1 bringSubviewToFront:view];
[self.view sendSubviewToBack:scrollView2];
scrollView1 and scrollView2 are two scrollviews that are part of the ViewController's view. Does this make sense ?
thanks mohan
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