Question

我在AppDelegate中设置了一个AVAudioPlayer，可以在启动时播放。它会继续在整个应用程序中播放，但是当我尝试停止或在其他课程中播放该播放器时，该应用程序会在该行上与EXC_BAD_ACCESS崩溃。

AppDelegate.swift

import AVFoundation

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var path = NSBundle.mainBundle().pathForResource("backgroundMusic", ofType: "wav")
var soundTrack = AVAudioPlayer()

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
    soundTrack = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: path), error: nil)
    soundTrack.numberOfLoops = -1
    soundTrack.volume = 0.35
    soundTrack.play()

    return true
}

OtherClass.swift

func aFunction() {
    let appDelegate = AppDelegate()
    appDelegate.soundTrack.stop()     //Here is where the app crashes. Same with .play()
}

感谢您的帮助！

Answer 1

通过执行AppDelegate()您正在创建一个新的app delegate实例;一个变量尚未启动的变量。您想获得UiApplications共享委托：

let appDelegate = UIApplication.sharedApplication().delegate as AppDelegate

从另一个类停止或播放AVAudioPlayer - 应用程序崩溃 - Swift

1 个答案: