Bound the movement of a view which is added to UIPanGestureRecognizer, within its superview

I want to know if there is a way to bound the movement of my UIView within its superview while using GestureRecognizer.

eg. I have a UIImageview To whom I add UIPanGestureRecognizer with action panPiece. I adjust its center in the following way to avoid its movement out of its superview. But it doesnt work properly.

-(CGPoint) centerWithBounds:(CGPoint)center andViewFrame:(CGRect)viewFrame andBoundingFrame:(CGRect)boundingFrame{

 CGFloat lowerXBound  = boundingFrame.origin.x + ( viewFrame.size.width/2 );
 CGFloat higherXBound = boundingFrame.origin.x + boundingFrame.size.width - ( viewFrame.size.width/2 );

 CGFloat lowerYBound  = boundingFrame.origin.y + ( viewFrame.size.height/2 );
 CGFloat higherYBound = boundingFrame.origin.y + boundingFrame.size.height - ( viewFra开发者_StackOverflowme.size.height/2 );

 if ( center.x < lowerXBound) {
  center.x = lowerXBound;
 }
 if ( center.x > higherXBound ){
  center.x = higherXBound;
 }
 if ( center.y < lowerYBound) {
  center.y = lowerYBound;
 }
 if ( center.y > higherYBound ){
  center.y = higherYBound;
 }

 return center;
}

- (void)panPiece:(UIPanGestureRecognizer *)gestureRecognizer
{
    UIView *piece = [gestureRecognizer view];

    [self adjustAnchorPointForGestureRecognizer:gestureRecognizer];

    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) {
        CGPoint translation = [gestureRecognizer translationInView:[piece superview]];
        CGPoint translatedCenter = CGPointMake([piece center].x + translation.x, [piece center].y + translation.y);
  CGPoint center = [self centerWithBounds:translatedCenter andViewFrame:[piece frame] andBoundingFrame:[[piece superview] frame]];
        [piece setCenter:center];
        [gestureRecognizer setTranslation:CGPointZero inView:[piece superview]];
    }
}

Code help is appreciated.

You just need to use the property clipsToBounds (set it to YES) to the superview. Had the same issue earlier. Works perfectly after that.

Perhaps it is because

standard UIImageViews, despite being UIView subclasses, do not react to gesture recognizer added to them

working with uigesturerecognizers