本地通知发出声音但不显示(Swift)

Question

我正在尝试使用Apple的UNUserNotificationCenter为我的应用创建本地通知.

这是我的代码:

let center = UNUserNotificationCenter.current()

let content = UNMutableNotificationContent()
content.title = task.name
content.body = task.notes
content.sound = UNNotificationSound.default()

let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)

let request = UNNotificationRequest(identifier: task.UUID, content: content, trigger: trigger)

center.add(request) { (error:Error?) in
   if let theError = error {
      print("Notification scheduling error: \(error)")
   }else{
      print("Notification was scheduled successfully")
   }
}

访问请求:

let center = UNUserNotificationCenter.current()

//request notification access
let options: UNAuthorizationOptions = [.alert, .sound]
center.requestAuthorization(options: options) { (granted, error) in
   if !granted {
      print("Notification access was denied")
   }
}

5秒后,应用程序发出默认声音,但不显示警报内容.我正在尝试前景和后台的应用程序.

Answer 1

我有同样的问题.

如果您的内容正文为空(即content.body ==""),那么即使您拥有标题,也不会收到通知.

因此,解决方案是确保您的内容正文不是空字符串.