Question

我使用UIDatePicker设置通知。当我在手机上运行应用程序时，通知无效。

有什么问题？

我的代码：

import UIKit
import UserNotifications

class ViewController: UIViewController {
    @IBOutlet weak var datePicker: UIDatePicker!

    var timer = Timer()    
    var time = 10

    override func viewDidLoad() {
        super.viewDidLoad()
        scheduleLocalNotification()
    }


    func scheduleLocalNotification() {
        let notification = UILocalNotification()
        let dateTime = datePicker.date
        notification.alertAction = "Call"
        notification.alertBody = "You have a call right now"
        notification.fireDate = dateTime
        notification.timeZone = NSTimeZone.default
        UIApplication.shared.scheduleLocalNotification(notification)
    }


    @IBAction func pushNotification(_ sender: AnyObject) {
        let AlertView = UIAlertController(title: "Time for your call!", message: "Press go to continue", preferredStyle:  UIAlertControllerStyle.alert)
        AlertView.addAction(UIAlertAction(title: "Go", style: UIAlertActionStyle.default, handler: nil))
        self.present(AlertView, animated: true, completion: nil)    
    }
 }

Answer 1

iOS 8 - iOS9：

正如@FrederikFrandsen所说，您必须先注册您的应用程序以获取用户通知：

let settings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)        
UIApplication.shared.registerUserNotificationSettings(settings)

然后，您可以通过实施以下AppDelegate功能来处理UIApplicationDelegate中的本地通知：

func application(_ application: UIApplication, didReceive notification: UILocalNotification) {
    // handle your local notification here
}

iOS 10：

在AppDelegate中添加新的UNUserNotificationCenterDelegate：

import UserNotifications

extension AppDelegate: UNUserNotificationCenterDelegate {
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert, .badge, .sound])
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        completionHandler()
    }
}

设置UNUserNotificationCenter的代理人（例如在applicationDidFinishLaunching中）：
```
UNUserNotificationCenter.current().delegate = self
```

请求授权：

let options: UNAuthorizationOptions = [.alert, .badge, .sound]
UNUserNotificationCenter.current().requestAuthorization(options: options, completionHandler: { (success, error) in
    // handle error
})

触发用户通知：

let components = NSCalendar.current.dateComponents([.hour, .minute], from: datePicker.date)

let content = UNMutableNotificationContent()
content.title = "title"
content.body = "body"
content.sound = UNNotificationSound.default()

let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: false)
let request = UNNotificationRequest(identifier: "myRequest", content: content, trigger: trigger)

UNUserNotificationCenter.current().add(request, withCompletionHandler: { error in
    // handle error
})

Answer 2

在iOS 10中，不推荐使用UILocalNotification。你将无法获得它的工作财产。您需要迁移代码才能使用新的用户通知框架。

Answer 3

在AppDelegate.swift中

你需要这个：

let settings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)

UIApplication.shared.registerUserNotificationSettings(settings)
UIApplication.shared.registerForRemoteNotifications()

为什么我的通知不适用于SWIFT3？

3 个答案: