How to mask a square image into an image with round corners in iOS?

Question

How can you mask a square image into an image with round corners?

Answer 1

Here is an even easier method that is available in iPhone 3.0 and up. Every View-based object has an associated layer. Each layer can have a corner radius set, this will give you just what you want:

UIImageView * roundedView = [[UIImageView alloc] initWithImage: [UIImage imageNamed:@"wood.jpg"]];
// Get the Layer of any view
CALayer * layer = [roundedView layer];
[layer setMasksToBounds:YES];
[layer setCornerRadius:10.0];

// You can even add a border
[layer setBorderWidth:4.0];
[layer setBorderColor:[[UIColor blueColor] CGColor]];

To use these methods you might need to add:

#import