如何在给定时间后激活功能?

How to activate a function after a given time?

我想在声音播放完成后激活一个功能。我假设需要包含 NSTimer,但我不确定如何实现它。如果您能给我一些有效的代码,那将很有帮助。

您应该 post 您尝试过的代码,然后有人可以帮助您使代码工作。在这种情况下,您不需要计时器来执行您正在做的事情。播放器上的 AVAudioPlayerDelegate 协议专为您的目的而设计:

import UIKit
import AVFoundation

class ViewController: UIViewController, AVAudioPlayerDelegate {

    var audioPlayer:AVAudioPlayer?

    func playSound(fileName:NSString)
    {
        let path = NSBundle.mainBundle().pathForResource(fileName, ofType:"wav")
        let url = NSURL.fileURLWithPath(path!)

        do {
            try audioPlayer = AVAudioPlayer(contentsOfURL: url)
            audioPlayer?.delegate = self
            audioPlayer?.play()
        } catch {
            print("Player not available")
        }
    }

    //MARK : AVAudioPlayerDelegate
    func audioPlayerDidFinishPlaying(player: AVAudioPlayer, successfully flag: Bool) {
        print("finished playing, do something else here")
    }
}