CKNotificationInfo soundName不起作用

Question

Sbuscription创建如下。它有效，但没有声音产生，为什么？ Doc说：if you specify the string default for this property, the system plays the default alert sound.

let s2 = CKSubscription(recordType: recordType, predicate: NSPredicate(format: "destination = %@", CKReference(recordID: CKRecordID(recordName: loggedInUserSettingRecordName!), action: .DeleteSelf)), options: .FiresOnRecordCreation)
s2.notificationInfo = CKNotificationInfo()
s2.notificationInfo.alertBody = " "
s2.notificationInfo.soundName = "default"
subscriptionsToSave.append(s2)

s2.notificationInfo.soundName = UILocalNotificationDefaultSoundName

也行不通

Answer 1

也需要更新registerUserNotificationSettings方法调用。

UIApplication.sharedApplication().registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Sound | .Alert, categories: nil))