IOS: round the cournes of a uicollectionViewCell clipin it's contents - ios

Question

I have a collection view with multiple cell styles and sizes I want to round the corners of the cell using this helper function:
void roundCornersOfAView(UIView *view, CGFloat radius, BOOL shadow){
CALayer* layer = [view layer];
[layer setCornerRadius:radius];
[layer setBorderColor:[UIColor blackColor].CGColor];
[layer setMasksToBounds:YES];
// CALayer* mask = [CALayer layer];
// [mask setFrame:CGRectMake(layer.frame.origin.x, layer.frame.origin.y, layer.frame.size.width, layer.frame.size.height)];
// [mask setCornerRadius:radius];
// [layer setMask:mask];
if (shadow) {
[layer setBorderWidth:0.5f];
//[layer setMasksToBounds:NO];
[layer setShadowColor:[UIColor blackColor].CGColor];
[layer setShadowOpacity:1.0];
[layer setShadowRadius:1.0];
[layer setShadowOffset:CGSizeMake(0.0, 0.0)];
}
[layer setMasksToBounds:YES];
}
using it like this in my cell for row at index path:
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:... forIndexPath:indexPath];
roundCornersOfAView([cell contentView], 30, YES);
The problem is that images on cell are not clipped in the rounded courners, neither labels or any other subviews, it only clips the background color... what is the best way to round courners and clip its content just like the instagram app?

Answer 1

Calling it like this:
roundCornersOfAView(cell, 30, YES);
using the helper function like this:
void roundCornersOfAView(UIView *view, CGFloat radius, BOOL shadow){
CALayer* layer = [view layer];
[layer setCornerRadius:radius];
[layer setBorderWidth:0.0f];
if (shadow) {
[layer setBorderColor:[UIColor blackColor].CGColor];
[layer setBorderWidth:0.1f];
[layer setShadowColor:[UIColor blackColor].CGColor];
[layer setShadowOpacity:0.5];
[layer setShadowRadius:1.5];
[layer setShadowOffset:CGSizeMake(0.0, 1.0)];
}
[layer setMasksToBounds:YES];
}
The problem was that I was sending the content view instead of the cell itself.