toddlee

#import <UIKit/UIKit.h>

@interface UIBarButtonItem (Todd)

@property (assign, nonatomic, getter = isSelected) BOOL selected;

- (instancetype)initWithImageName:(NSString *)imageName target:(id)target selector:(SEL)selector;
- (instancetype)initWithImageName:(NSString *)imageName selectedImageName:(NSString *)selectedImageName target:(id)target selector:(SEL)selector;

@end

toddlee

- (UIImage *)maskImage:(UIImage *)image withMask:(UIImage *)maskImage
{
    CGImageRef maskRef = maskImage.CGImage;
    CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),
                                        CGImageGetHeight(maskRef),
                                        CGImageGetBitsPerComponent(maskRef),
                                        CGImageGetBitsPerPixel(maskRef),
                                        CGImageGetBytesPerRow(maskRef),
                                        CGImageGetDataProvider(maskRef), NULL, false);