ios - 为什么我的通知在 SWIFT3 中不起作用？

Question

我使用 UIDatePicker 设置通知。当我在手机上运行该应用程序时，通知不起作用。

有什么问题吗？

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:

1. 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)
   

2. 然后您可以通过实现以下 UIApplicationDelegate 函数在您的 AppDelegate 中处理本地通知:

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

iOS 10:

1. 在您的 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()
       }
   }
   

2. 设置 UNUserNotificationCenter 的委托(delegate)(例如在 applicationDidFinishLaunching 中):

   UNUserNotificationCenter.current().delegate = self
   

3. 请求授权:

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

4. 触发您的用户通知:

   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
   })