本地通知聲音無法正常工作

Question

我試圖製作鬧鐘應用程序，但是當我嘗試進行本地通知時，我無法播放聲音。我得到這個錯誤：

[user info = (null)} with a sound but haven't received permission from the user to play sounds]

下面是代碼：

@IBOutlet var setAlaram: UIDatePicker! 


@IBAction func setAlarmButton(sender: AnyObject) { 

    var dateformater = NSDateFormatter() 
    dateformater.timeZone = NSTimeZone .defaultTimeZone() 
    dateformater.timeStyle = NSDateFormatterStyle.ShortStyle 
    dateformater.dateStyle = NSDateFormatterStyle.ShortStyle 

    var datetimestring = NSString() 
    datetimestring = dateformater.stringFromDate(setAlaram.date) 
    println(datetimestring) 

    [self .localnotification(setAlaram.date)] 

} 

func localnotification (firedate:NSDate) { 

    var localNotification:UILocalNotification = UILocalNotification() 
    localNotification.fireDate = firedate 
    localNotification.alertBody = "time to woke up" 
    localNotification.soundName = "alarm.wav" 
    UIApplication.sharedApplication().scheduleLocalNotification(localNotification) 

} 

override func viewDidLoad() { 
    super.viewDidLoad() 
    let date1 = NSDate() 
    setAlaram.date = date1 

} 

Answer 1

您需要徵得他的許可用戶發送本地通知在iOS的8

你可以這樣做當您的應用程序在您的AppDelegate方法中啓動時

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { 
    application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Sound | .Alert | .Badge, categories: nil)) 
    return true 
} 

Answer 2

在sbarow的幫助下發布最終答案，我發現這裏的解決方案是可能對別人有幫助的代碼。

1. AppDelegate.swift替換此：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { 
    application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Sound | .Alert | .Badge, categories: nil)) 
    return true 
} 

2. ViewController.swift：

@IBOutlet var setAlaram: UIDatePicker! 


@IBAction func setAlarmButton(sender: AnyObject) { 

    var dateformater = NSDateFormatter() 
    dateformater.timeZone = NSTimeZone .defaultTimeZone() 
    dateformater.timeStyle = NSDateFormatterStyle.ShortStyle 
    dateformater.dateStyle = NSDateFormatterStyle.ShortStyle 

    var datetimestring = NSString() 
    datetimestring = dateformater.stringFromDate(setAlaram.date) 
    println(datetimestring) 

    [self .localnotification(setAlaram.date)] 
} 

func localnotification (firedate:NSDate) { 
    var localNotification:UILocalNotification = UILocalNotification() 
    localNotification.fireDate = firedate 
    localNotification.alertBody = "time to woke up" 
    localNotification.soundName = "alarm.wav" 

    UIApplication.sharedApplication().scheduleLocalNotification(localNotification) 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 

    let date1 = NSDate() 
    setAlaram.date = date1 
}