I'm trying to detect a touch on a UISubview of a view being animated
Here's my detection code:
//simple but not very elegant way of getting correct frame
CGRect keepFrame = self.fishContainer.layer.frame;
self.fishContainer.layer.frame = [[self.fishContainer.layer presentationLayer] frame];
//get touch location, taking presentation layer into account. (See above)
CGPoint p = [sender locationInView:self.fishContainer];
CALayer *layer =[self.fishContainer.layer presentationLayer];
//apply relevant transform
p = CGPointApplyAffineTransform(p,layer.affineTransform);
EBLog(@"checking point %@",NSStringFromCGPoint(p));
UIView *vToRemove = nil;
//find topmost view containing touched point
for (UIView *v in self.parasites) {
EBLog(@"-BOUND %@",NSStringFromCGRect(v.frame));
if(CGRectContainsPoint(v.frame, p))
{
vToRemove = v;
}
}
//OK, we have a view. Let's remove it.
if(vToRemove)
{
EBLog(@"found one");
[vToRemove removeFromSuperview];
[self.parasites removeObject:vToRemove];
if ([self.parasites count] == 0) {
[self showWinnerScreen];
[self stopGame];
}
}
//restore view frame
self.fishContainer.layer.frame = keepFrame;
Everything works correctly as long as I don't animate parasiteArea
parentview.
When I animate parasiteArea
's parentview (A CAAnimation
consisting of move of the view, scale of the view, and rotate of the view) , the touch is outside the bounds of the expected subview.
UPDATE
I manged to get the detection working in most cases (see code above), by using the presentationLayer
property and CGPointApplyAffineTransform
. There is however, still some cases where it dosnt work.
I guess I need to translate the touch point to the coordinate space of the CAAnimation
.
Or something like that? any suggestions?
I ended up using UIView animateWithDuration
instead of CAAninmation
. For my purpose the limited animation possibles were enough.
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