Question

我正在开发一款应用，并尝试确定我的应用是否已注册推送通知。我的意思是用户是否允许推送通知。但是，当我想检查代码时，它总是返回true。我不知道为什么会这样。

我的检查推送通知注册的代码。

let isRegistered = UIApplication.shared.isRegisteredForRemoteNotifications

if isRegistered == false {

    let alertController = UIAlertController(title: "Notification Alert", message: "Kindly enable push notifications", preferredStyle: .alert)
    let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in
        guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
            return
        }
        if UIApplication.shared.canOpenURL(settingsUrl) {
            UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
            })
        }
    }
    let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
    alertController.addAction(cancelAction)
    alertController.addAction(settingsAction)
    DispatchQueue.main.async {
        self.present(alertController, animated: true, completion: nil)

    }
}

Answer 1

我的理解是，如果＆＃34; isRegistered＆＃34;是的，你会要求用户允许通知，在这种情况下你应该要求这样的授权：

let center = UNUserNotificationCenter.current()
center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in
        if granted {
            DispatchQueue.main.async(execute: {
                UIApplication.shared.registerForRemoteNotifications()
            })
        }
    }

UIApplication.shared.isRegisteredForRemoteNotifications始终返回true

1 个答案: