目標C延時

Question

這是到目前爲止我的代碼：

- (IBAction) startApproximiteLevel:(id)sender { 
[getBackgroundLevel startAnimation:self]; 
float sample1; 
float sample2; 
float sample3; 
float sample4; 
float sample5; 
float finalSample; 

float charlieSoundVolume = [charlieSoundLevel floatValue]; 

sample1 = charlieSoundVolume; 
sleep(1) 
sample2 = charlieSoundVolume; 
sleep(1) 
sample3 = charlieSoundVolume; 
sleep(1) 
sample4 = charlieSoundVolume; 
sleep(1) 
sample5 = charlieSoundVolume; 
sleep(1); 
finalSample = ((sample1 + sample2 + sample3 + sample4 + sample5)/5); 
self.backgroundSoundChange.floatValue = finalSample; 

[getBackgroundLevel stopAnimation:self]; 

}

但是，這將更新charlieSoundLevel停止我的代碼另一部分。任何想法如何做到這一點沒有睡眠（）？

利亞

Answer 1

看[NSObject performSelector: withObject: afterDelay:]一定的時間後，發動對運行循環的方法。