Swift - 本地消息的推送通知（附樣例）

使用UILocalNotification可以很友善的實作消息的推送功能。我們可以設定這個消息的推送時間，推送内容等。

當推送時間一到，不管使用者在桌面還是其他應用中，螢幕上方會都顯示出推送消息。

1,推送消息的發送

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--- AppDelegate.swift ---

​ ​import​ ​ ​ ​UIKit​ ​@UIApplicationMain​ ​class​ ​AppDelegate​ ​: ​ ​UIResponder​ ​, ​ ​UIApplicationDelegate​ ​{​ ​var​ ​window: ​ ​UIWindow​ ​?​ ​func​ ​application(application: ​ ​UIApplication​ ​,​ ​didFinishLaunchingWithOptions launchOptions: [​ ​NSObject​ ​: ​ ​AnyObject​ ​]?) -> ​ ​Bool​ ​{​ ​//開啟通知​ ​let​ ​settings = ​ ​UIUserNotificationSettings​ ​(forTypes: [.​ ​Alert​ ​, .​ ​Badge​ ​, .​ ​Sound​ ​],​ ​categories: ​ ​nil​ ​)​ ​application.registerUserNotificationSettings(settings)​ ​return​ ​true​ ​}​ ​func​ ​applicationWillResignActive(application: ​ ​UIApplication​ ​) {​ ​}​ ​func​ ​applicationDidEnterBackground(application: ​ ​UIApplication​ ​) {​ ​}​ ​func​ ​applicationWillEnterForeground(application: ​ ​UIApplication​ ​) {​ ​}​ ​func​ ​applicationDidBecomeActive(application: ​ ​UIApplication​ ​) {​ ​}​ ​func​ ​applicationWillTerminate(application: ​ ​UIApplication​ ​) {​ ​}​ ​}​

--- ViewController.swift ---

​import​ ​UIKit​ ​class​ ​ViewController​ ​: ​ ​UIViewController​ ​{​ ​override​ ​func​ ​viewDidLoad() {​ ​super​ ​.viewDidLoad()​ ​//發送通知消息​ ​scheduleNotification(12345);​ ​//清除所有本地推送​ ​//UIApplication.sharedApplication().cancelAllLocalNotifications()​ ​}​ ​//發送通知消息​ ​func​ ​scheduleNotification(itemID:​ ​Int​ ​){​ ​//如果已存在該通知消息，則先取消​ ​cancelNotification(itemID)​ ​//建立UILocalNotification來進行本地消息通知​ ​let​ ​localNotification = ​ ​UILocalNotification​ ​()​ ​//推送時間（設定為30秒以後）​ ​localNotification.fireDate = ​ ​NSDate​ ​(timeIntervalSinceNow: 30)​ ​//時區​ ​localNotification.timeZone = ​ ​NSTimeZone​ ​.defaultTimeZone()​ ​//推送内容​ ​localNotification.alertBody = ​ ​"來自hangge.com的本地消息"​ ​//聲音​ ​localNotification.soundName = ​ ​UILocalNotificationDefaultSoundName​ ​//額外資訊​ ​localNotification.userInfo = [​ ​"ItemID"​ ​:itemID]​ ​UIApplication​ ​.sharedApplication().scheduleLocalNotification(localNotification)​ ​}​ ​//取消通知消息​ ​func​ ​cancelNotification(itemID:​ ​Int​ ​){​ ​//通過itemID擷取已有的消息推送，然後删除掉，以便重新判斷​ ​let​ ​existingNotification = ​ ​self​ ​.notificationForThisItem(itemID) ​ ​as​ ​UILocalNotification​ ​?​ ​if​ ​existingNotification != ​ ​nil​ ​{​ ​//如果existingNotification不為nil，就取消消息推送​ ​UIApplication​ ​.sharedApplication().cancelLocalNotification(existingNotification!)​ ​}​ ​}​ ​//通過周遊所有消息推送，通過itemid的對比，傳回UIlocalNotification​ ​func​ ​notificationForThisItem(itemID:​ ​Int​ ​)-> ​ ​UILocalNotification​ ​? {​ ​let​ ​allNotifications = ​ ​UIApplication​ ​.sharedApplication().scheduledLocalNotifications​ ​for​ ​notification ​ ​in​ ​allNotifications! {​ ​let​ ​info = notification.userInfo ​ ​as​ ​! [​ ​String​ ​:​ ​Int​ ​]​ ​let​ ​number = info[​ ​"ItemID"​ ​]​ ​if​ ​number != ​ ​nil​ ​&& number == itemID {​ ​return​ ​notification ​ ​as​ ​UILocalNotification​ ​}​ ​}​ ​return​ ​nil​ ​}​ ​override​ ​func​ ​didReceiveMemoryWarning() {​ ​super​ ​.didReceiveMemoryWarning()​ ​}​ ​}​

2，點選推送消息的響應

收到推送，如果點選推送内容，則會重新進入到App，這個時候會調用AppDelegate中的func application(application: UIApplication, didReceiveLocalNotification

notification: UILocalNotification)代理方法。

在這個方法中我們可以根據推送的消息内容實作相關的功能。

​func​ ​application(application: ​ ​UIApplication​ ​,​ ​didReceiveLocalNotification notification: ​ ​UILocalNotification​ ​) {​ ​//設定Badge數目​ ​UIApplication​ ​.sharedApplication().applicationIconBadgeNumber = 0​ ​let​ ​info = notification.userInfo ​ ​as​ ​! [​ ​String​ ​:​ ​Int​ ​]​ ​let​ ​number = info[​ ​"ItemID"​ ​]​ ​let​ ​alertController = ​ ​UIAlertController​ ​(title: ​ ​"本地通知"​ ​,​ ​message: ​ ​"消息内容：\(notification.alertBody)使用者資料：\(number)"​ ​,​ ​preferredStyle: ​ ​UIAlertControllerStyle​ ​.​ ​Alert​ ​)​           let cancel = UIAlertAction(title: "取消", style: UIAlertActionStyle.Cancel, handler: nil);                    alertController.addAction(cancel); ​self​ ​.window?.rootViewController!.presentViewController(alertController,​ ​animated: ​ ​true​ ​, completion: ​ ​nil​ ​)​ ​}​