我正在使用 Swift 编写代码并尝试显示通知。它们确实出现了，但没有播放声音。我确实浏览了这个网站和其他网站，我的代码看起来与建议的解决方案相同，所以我不确定哪里出了问题。

这是我的 AppDelegate.swift:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: UIUserNotificationType.Sound | UIUserNotificationType.Alert |
        UIUserNotificationType.Badge, categories: nil
        ))

    return true
}

和

func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification) {

    var alert = UIAlertView()

    alert.title = "Alert"
    alert.message = notification.alertBody
    alert.addButtonWithTitle("Dismiss")

    alert.show()
}

这是我的 ViewConrtoller.swift 中的函数:

override func viewDidLoad() {
    super.viewDidLoad()
    var localNotification: UILocalNotification = UILocalNotification()

    localNotification.soundName = "sample.wav";
    localNotification.fireDate = NSDate(timeIntervalSinceNow: 2)
    localNotification.alertAction = "TEST"
    localNotification.alertBody = "Sound Test"
    localNotification.applicationIconBadgeNumber = 1

    UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
}

最佳答案

环顾四周后，我找到了一些可能有帮助的答案。似乎是问题的第一件事是关闭设备上的声音，请参阅 this 的答案。和 this post .另一个解决方案是 change the audio file format ，即使文件类型正确，更改它也解决了问题。您还可能会找到 this post有帮助，但没有一个答案被接受。而且，正如 rmaddy 提到的，您可能想看看 Apple docs :

For remote notifications in iOS, you can specify a custom sound that iOS plays when it presents a local or remote notification for an app. The sound files can be in the main bundle of the client app or in the Library/Sounds folder of the app’s data container.

Custom alert sounds are played by the iOS system-sound facility, so they must be in one of the following audio data formats:

Linear PCM MA4 (IMA/ADPCM) µLaw aLaw You can package the audio data in an aiff, wav, or caf file. Then, in Xcode, add the sound file to your project as a nonlocalized resource of the app bundle or to the Library/Sounds folder of your data container.

You can use the afconvert tool to convert sounds. For example, to convert the 16-bit linear PCM system sound Submarine.aiff to IMA4 audio in a CAF file, use the following command in the Terminal app:

afconvert /System/Library/Sounds/Submarine.aiff ~/Desktop/sub.caf -d ima4 -f caff -v You can inspect a sound to determine its data format by opening it in QuickTime Player and choosing Show Movie Inspector from the Movie menu.

Custom sounds must be under 30 seconds when played. If a custom sound is over that limit, the default system sound is played instead.

编辑:

关于主包:

Each application has a main bundle, which is the bundle that contains the application code. When a user launches an application, it finds the code and resources in the main bundle that it immediately needs and loads them into memory. Thereafter, the application can dynamically (and lazily) load code and resources from the main bundle or subordinate bundles as required.

The NSBundle class and, for procedural code, the CFBundleRef opaque type of Core Foundation give your application the means to locate resources in a bundle. In Objective-C, you first must obtain an instance of NSBundle that corresponds to the physical bundle. To get an application’s main bundle, call the class method mainBundle. Other NSBundle methods return paths to bundle resources when given a filename, extension, and (optionally) a bundle subdirectory. After you have a path to a resource, you can load it into memory using the appropriate class.

要查看此信息，请单击 bundle ，然后单击“更多...”

编辑2:

尝试在代码文件所在的位置添加音频文件，不要为音频添加花哨的文件夹，只需将其放入其中即可。

Each application has a main bundle, which is the bundle that contains the application code. When a user launches an application, it finds the code and resources in the main bundle that it immediately needs and loads them into memory. Thereafter, the application can dynamically (and lazily) load code and resources from the main bundle or subordinate bundles as required.

因此将您的音频文件放入主包中，看看它是否有效。

关于ios - 如何在本地通知中启用声音？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32927529/