(ios10.2)(swift3)如何判断用户是否点击了本地通知？

Question

我做了一个应用程序，当你点击一个按钮时，它会在一段时间后发送通知。此通知在ViewController中创建。如何让我的应用程序在用户单击通知后执行某些操作？我使用的是swift 3，而不是UILocalNotification。

Answer 1

在您的应用委托中，将一个对象配置为用户通知中心的UNUserNotificationCenterDelegate并实现userNotificationCenter(_:didReceive:withCompletionHandler:)。

请注意，如果用户只是关闭通知警报，则不会调用此方法，除非您还使用.customDismissAction选项配置了与此通知对应的类别(UNNotificationCategory)。

Answer 2

iOS 10中弃用了UILocalNotification，您应该使用UserNotifications框架。

最重要的是不要忘记import UserNotifications

首先，您应该设置UNUserNotificationCenterDelegate。

extension AppDelegate: UNUserNotificationCenterDelegate {
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        //  - Handle notification 
    }
}

而不是设置UNUserNotificationCenter的委托。

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        UNUserNotificationCenter.current().delegate = self
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound]) { (accepted, _) in
            if !accepted {
                print("Notification access denied.")
            }
        }
        return true
    }

现在您可以设置通知了。

func setup(at: Date) {
        let calendar = Calendar.current
        let components = calendar.dateComponents(in: .current, from: date)
        let newComponents = DateComponents(calendar: calendar, timeZone: .current, 
        month: components.month, day: components.day, hour: components.hour, minute: components.minute)

        let trigger = UNCalendarNotificationTrigger(dateMatching: newComponents, repeats: false)

        let content = UNMutableNotificationContent()
        content.title = "Reminder"
        content.body = "Just a reminder"
        content.sound = UNNotificationSound.default()

        let request = UNNotificationRequest(identifier: "textNotification", content: content, trigger: trigger)

        UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
        UNUserNotificationCenter.current().add(request) {(error) in
            if let error = error {
                print("Uh oh! We had an error: \(error)")
            }
        }
    }

并最终处理它！

extension AppDelegate: UNUserNotificationCenterDelegate {
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        if response.notification.request.identifier == "textNotification" {
            let appDelegate = UIApplication.shared.delegate as! AppDelegate
            guard let rootVc = appDelegate.window?.rootViewController else { return }
            let alert = UIAlertController(title: "Notification", message: "It's my notification", preferredStyle: .alert)
            let action = UIAlertAction(title: "OK", style: .cancel, handler: nil)
            alert.addAction(action)
            rootVc.present(alert, animated: true, completion: nil)
        }
    }
}