ios - 如何在 Swift 4 中按顺序执行操作

Question

我目前正在开发一个简单的应用程序，只有一个图像和一个按钮。按下按钮时，将播放声音并打开网页。我希望在打开网页之前先播放声音。我怎样才能做到这一点？这是我的代码:

@IBAction func webButton(_ sender: UIButton) {

    let Bismillah = NSURL(fileURLWithPath: Bundle.main.path(forResource: "Basmalah", ofType: "mp3")!)
    do {
        audioPlayer = try AVAudioPlayer(contentsOf: Bismillah as URL)
        audioPlayer.prepareToPlay()
    } catch {
        print("Problem in getting File")
    }
    audioPlayer.play()


    if let url = URL(string: "http:/donate.edialoguec.com/campaign/details/63") {
        UIApplication.shared.open(url, options: [:])
    }
}

Answer 1

你可以试试

audioPlayer.play()
DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
   if let url = URL(string: "http:/donate.edialoguec.com/campaign/details/63")  {
     UIApplication.shared.open(url, options: [:])
   }
 }