在 iOS 14.6 中实施本地严重警报？

如何解决在 iOS 14.6 中实施本地严重警报？

Apple 已批准我申请使用严重警报的权利。我将我的权利附加到我的包标识符并创建了一个配置文件并根据 Apple 的说明手动签署了我的应用程序：https://help.apple.com/developer-account/#/dev38c81d4cd

我还添加了一个 properties.entitlements 文件，其中包含正确修改的包标识符和布尔值“YES”。我的“构建设置”在“签名”中没有“代码签名权利”。

当我运行下面的代码时，我收到接受警报的提示，但没有出现严重警报。有什么建议么？谢谢！

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    var authOptions: UNAuthorizationOptions?
    if #available(iOS 12.0,*) {
        authOptions = [.alert,.badge,.sound,.criticalAlert]
    } else {
        authOptions = [.alert,.sound]
    }
    UNUserNotificationCenter.current().requestAuthorization(options:
      authOptions!) { (granted,error) in
        if !granted {
            print("The application requires Notifications permission to display push notifications. Please enable it in settings.")
        } else {
            
            let userNotificationCenter = UNUserNotificationCenter.current()
            
            var contentTitle:String?
            var contentMessage:String?
            var contentSound:UNNotificationSound?
            
            contentTitle = "Message:"
            contentMessage = "Critical Alert!"
            contentSound = .defaultCritical
            
            let content = UNMutableNotificationContent()
            content.title = contentTitle!
            content.subtitle = contentMessage!
            content.sound = contentSound
            
            let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 1,repeats: false)
            
            let request = UNNotificationRequest(identifier: UUID().uuidString,content: content,trigger: trigger)
            
            userNotificationCenter.add(request)
            
        }
    }
}

}