Question

目前我有以下代码，主要是要求用户发送通知的权限，然后检查通知是否已启用：

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
    }

代码可以工作，但是，在用户可以选择＆＃34;是＆＃34;之前，它会检查是否启用了通知。或＆＃34;不＆＃34;。因此，无论选择什么，弹出对话框。有没有办法可以等到用户选择＆＃34;是＆＃34;或＆＃34;不＆＃34;？

Answer 1

您可以将支票移至回调中，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
    }
})

在征得许可后如何检查是否启用了UNNotifications？

1 个答案: