gistfile1.m

UIImage* resizableImageWithCapInsets(id self, SEL _cmd, UIEdgeInsets capInsets) {
    return [self stretchableImageWithLeftCapWidth:capInsets.left topCapHeight:capInsets.top];
}

- (void)addMissingMethod {
    if (![UIImage instancesRespondToSelector:@selector(resizableImageWithCapInsets:)]) {
        class_addMethod([UIImage class], @selector(resizableImageWithCapInsets:), (IMP) resizableImageWithCapInsets, "@@:{top=CGFloat, left=CGFloat, bottom=CGFloat, right=CGFloat");
    }
}