Disabling a method - iPhone

I want to disable a method from running if my audio clip is playing.

I have myImage.hidden working if the audio.playing is running, how would I go about disabling a method in the sa开发者_JAVA技巧me way?

if (audio.playing == YES) {
    // image is hidden
    myImage.hidden = YES;
}

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Put this code at the top of your method:

if (audio.playing) {
    return;
}