when should you use __bridge vs. CFBridgingRelease/CFBridgingRetain?

Question

I have this code that uses \"__bridge\" to cast the ids of colors:

  CGColorRef tabColor = (5 == 5
                         ? [UIColor blueColor].CGColor
            


        

Answer 1

With NSURL is the same problem

NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"];
NSURL *soundURL = [NSURL fileURLWithPath:soundPath];
AudioServicesCreateSystemSoundID(CFBridgingRetain(soundURL), &soundEffect);