[TIL ObjC.004];

Prevent image bleed past layer border.

1. Create UIVIew with a UIImageView inside. Constraints on the UIImageView should be -1 from all side of the UIVIew.

2. Add border properties to the UIView. 

    cell.avatarContainerView.layer.borderWidth = 2.0;
    cell.avatarContainerView.layer.borderColor = [UIColoe whiteColor].CGColor;
    cell.avatarContainerView.layer.cornerRadius = 
        cell.avatarContainerView.bounds.size.height / 2;

Optional:

Add .layer.shouldRasterize = YES; for performance gains.