请求许可后，如何检查是否启用了 UNNotifications？

Question

目前我有以下代码，本质上是询问用户发送通知的权限，然后检查是否启用了通知：

UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler: { (granted, error) in
        if granted {

        } else {

        }
    })

    let notifType = UIApplication.shared.currentUserNotificationSettings?.types
    if notifType?.rawValue == 0 {
        print("being called")
        let alert = UIAlertController(title: "Notifications are disabled for this app.", message: "Please enable notifications for the app to work properly. This can be done by going to Settings > Notifications > NAME HERE and allow notifications.", preferredStyle: UIAlertControllerStyle.alert)
        alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.cancel, handler: nil))
        show(alert, sender: self)
    } else {
        //enabled
    }

该代码有效，但是，它会在用户 select "yes" 或 "no" 之前检查通知是否已启用。这样，无论输入什么select，都会弹出对话框。有没有办法等到用户 selects "yes" 或 "no"?

时才检查授权状态

Answer 1

您可以将检查移到回调中，因此首先检查授权：

UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler: { (granted, error) in
    if (granted) {
        // Alert here
    } else {
       // Or here
    }
})

请求许可后，如何检查是否启用了 UNNotifications？

How to check if UNNotifications are enabled, after asking for permission?

ios

swift

unusernotificationcenter