Question

我收到以下错误：

[0x19bf89310] AVAudioSession.mm:646： - [AVAudioSession setActive：withOptions：error：]：停用已运行I / O的音频会话。在停用音频会话之前，应停止或暂停所有I / O.

我已阅读了这篇文章：

iOS8 AVAudioSession setActive error

然而，那里的解决方案并没有解决我的问题。这是：

小型应用程序（游戏）
AudioHelper.swift处理的音频背景音乐
使用SKActino.playSoundFile

再现

开始游戏（背景音乐开始播放）
关闭游戏（音乐停止）
重新开始游戏（音乐重新开始）
上面出现错误
SKAction.playSoundFile不再总是有效（有些做，有些不做）

我的音频处理代码（又名AudioHelper.swift）

class AudioHelper: NSObject, AVAudioPlayerDelegate {
    var player : AVAudioPlayer?

    class var defaultHelper : AudioHelper {
        struct Static {
            static let instance : AudioHelper = AudioHelper()
        }

        return Static.instance
    }

    override init() {
        super.init()
    }

    func initializeAudio() {
        var url = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("sound_float", ofType: ".mp3")!)
        self.player = AVAudioPlayer(contentsOfURL: url, error: nil)
        self.player?.numberOfLoops = -1
        self.player?.play()
    }

    func stopAudio() {
        self.player?.stop()
        self.player?.prepareToPlay()
        AVAudioSession.sharedInstance().setActive(false, error: nil)
    }

    func startAudio() {
        AVAudioSession.sharedInstance().setActive(true, error: nil)
        self.player?.play()
    }

    func audioPlayerDidFinishPlaying(player: AVAudioPlayer!, successfully flag: Bool) {
        self.stopAudio()
    }
}

我正在初始化＆amp;暂停＆amp;从AppDelegate

开始

class AppDelegate: UIResponder, UIApplicationDelegate {


    var window: UIWindow?

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        AudioHelper.defaultHelper.initializeAudio()
        return true
    }

    func applicationWillResignActive(application: UIApplication) {
        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
        // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
        AudioHelper.defaultHelper.stopAudio()
    }

    func applicationDidBecomeActive(application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
        AudioHelper.defaultHelper.startAudio()
    }
}

我哪里错了？

Answer 1

我必须将setActive(false0)移动到委托方法。新助手类看起来像这样：

import Foundation
import AVFoundation

class AudioHelper: NSObject, AVAudioPlayerDelegate {
    var player : AVAudioPlayer?


    class var defaultHelper : AudioHelper {
        struct Static {
            static let instance : AudioHelper = AudioHelper()
        }

        return Static.instance
    }

    override init() {
        super.init()
    }

    func initializeAudio() {
        var url = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("sound_float", ofType: ".mp3")!)
        self.player = AVAudioPlayer(contentsOfURL: url, error: nil)
        self.player?.numberOfLoops = -1
        self.player?.play()

    }

    func stopAudio() {
        self.player?.stop()
        self.player?.prepareToPlay()
    }

    func startAudio() {
        AVAudioSession.sharedInstance().setActive(true, error: nil)
        self.player?.play()
    }


    func audioPlayerDidFinishPlaying(player: AVAudioPlayer!, successfully flag: Bool) {
        AVAudioSession.sharedInstance().setActive(false, error: nil)
    }
}

立即行动

AVAudioSession重新激活问题

1 个答案: