Question

AudioServicesPlaySystemSound我有这种不稳定的行为。

出于某种原因，通过我的（真实设备）iPhone 5/6一切都运行良好。但有时候我的（真实设备）iPhone 6 + S，我听到 - 有时候 - 只有3或2声音5我正在玩

我用来创建这个声音的功能：

  if let soundURL = NSBundle.mainBundle().URLForResource(soundName, withExtension: "mp3") {
            var mySound: SystemSoundID = 0
            AudioServicesCreateSystemSoundID(soundURL, &mySound)

            AudioServicesPlaySystemSound(mySound);

        }

Answer 1

你应该在代码中做一些调试并找出问题的真正原因，下面的代码将打印出OSStatus：

let result = AudioServicesCreateSystemSoundID(soundURL, &mySound)
print(result)

当结果不为0时你需要弄清楚什么是错的，最常见的问题是声音文件应该少于30秒，否则它将无法通过系统声音服务播放。

另一个问题是你应该在应用程序的开头创建系统声音，然后在需要时播放返回的mySound，每次播放时都不要调用AudioServicesCreateSystemSoundID。

import UIKit
import AudioToolbox

class ViewController: UIViewController {
    var mySound: SystemSoundID = 0

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        let soundName = "mytest"

        if let soundURL = NSBundle.mainBundle().URLForResource(soundName, withExtension: "mp3") {
            let result = AudioServicesCreateSystemSoundID(soundURL, &mySound)
            print(mySound)
            print(result)
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func play (sender: UIButton) {
            AudioServicesPlaySystemSound(mySound);
    }
}

AudioServicesPlaySystemSound奇怪的行为

1 个答案: