问题
I don't have access an iPhone to test on right now. Can anyone tell me how long this call makes the phone vibrate? Thanks.
回答1:
This article at http://www.kimballlarsen.com/2009/12/22/how-to-make-iphone-vibrate-for-a-long-time/ states that:
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate) API call will produce exactly 0.4 seconds of vibration and 0.1 seconds of silence.
来源：https://stackoverflow.com/questions/3338006/how-long-does-audioservicesplaysystemsoundksystemsoundid-vibrate-last