imageNamed from a specific bundle

imageNamedinBundle.m

// This isn't documented to handle @2x, but it appears to in practice
// Had to put all images in a bundle so something like this:
image = [UIImage imageNamed:@"rounded_button.png"];

// became:
NSURL *url = [[NSBundle mainBundle] URLForResource:@"BruffLiteResources" withExtension:@"bundle"];
NSBundle *bundle = [NSBundle bundleWithURL:url];
NSString *imagePath = [bundle pathForResource:@"share" ofType:@"png"];
image = [UIImage imageWithContentsOfFile:imagePath];

// passing nil to compatibleWithTraitCollection uses the main screen's traits (so @2x @3x are picked up)