NS_OPTIONS demo

NS_OPTIONS_demo.m

    UIViewAnimationOptions options = UIViewAnimationOptionAutoreverse
                                     //1 <<  4
                                    |UIViewAnimationOptionAllowUserInteraction
                                     //1 <<  1
                                    |UIViewAnimationOptionCurveLinear;
                                     //3 << 16
    // option = 10000 | 10 | 1010000000000000000
    //        = 1010000000000010010 (binary)

    if ((options & UIViewAnimationOptionCurveLinear) != 0) {
        NSLog(@"UIViewAnimationOptionCurveLinear");
    }
    
    if ((options & UIViewAnimationOptionAllowAnimatedContent) != 0) {
        NSLog(@"UIViewAnimationOptionAllowAnimatedContent");
    }else {
        NSLog(@"NO UIViewAnimationOptionAllowAnimatedContent");
    }
    
    [UIView transitionWithView:self.view
                      duration:1
                       options:options
                    animations:nil
                    completion:nil];