MarkPowell MarkPowell - 11 months ago 89
iOS Question

Setting Corner Radius on UIImageView not working

I'm at a bit of a loss. I've used the layer property of UIView to round the corners of multiple elements in my app. However, this one UIImageView is simply not complying. Not sure what I am missing.

The UIImageView (called previewImage) is contained in a Table View Cell. I've tried setting the cornerRadius property multiple location (in the cell itself and in the controller that creates the cell) to no avail.

static NSString *CellIdentifier = @"MyTableViewCell";

MyTableViewCell *cell = (MyTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:CellIdentifier owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
cell.previewImage.layer.cornerRadius = 20; //Made it 20 to make sure it's obvious.

Is there something about the way cells are loaded that I'm missing?

Answer Source

You need to set the layer's masksToBounds property to YES:

cell.previewImage.layer.masksToBounds = YES;

This is because the UIImageView control creates a pseudo-subview to hold the UIImage object.