相关疑难解决方法(0)

运行下面的代码不会在我的屏幕右上角显示通知（作为横幅或警报）。通知显示在通知中心。

我确保在我的系统上禁用了“请勿打扰”。我还尝试了“系统偏好设置”->“通知”->“我的应用程序名称”中的“横幅”和“警报”设置。

来源：

import Cocoa
import UserNotifications

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        let notificationCenter = UNUserNotificationCenter.current()
        notificationCenter.requestAuthorization(options: [.alert, .badge, .sound]) { granted, error in
            print("requestNotificationAuthorization: granted=\(granted) error=\(String(describing: error))")
        }


        let content = UNMutableNotificationContent()
        content.title = "bar"
        content.body = "foo"
        content.categoryIdentifier = "alarm"

        let uuidString = UUID().uuidString

        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 2, repeats: false)

        let request = UNNotificationRequest(identifier: uuidString, content: content, trigger: trigger)

        notificationCenter.add(request, withCompletionHandler: { error in
            print("completion handler called")
            if error …