使用UILocalNotification可以很方便的实现消息的推送功能。我们可以设置这个消息的推送时间,推送内容等。
1,推送消息的发送
--- AppDelegate.swift ---
--- ViewController.swift ---
2,点击推送消息的响应
当推送时间一到,不管用户在桌面还是其他应用中,屏幕上方会都显示出推送消息。
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import UIKit @UIApplicationMain class AppDelegate : UIResponder , UIApplicationDelegate { var window: UIWindow ? func application(application: UIApplication , didFinishLaunchingWithOptions launchOptions: [ NSObject : AnyObject ]?) -> Bool { //开启通知 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 ---
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import UIKit class ViewController : UIViewController { override func viewDidLoad() { super .viewDidLoad() //发送通知消息 scheduleNotification(12345); //清除所有本地推送 //UIApplication.sharedApplication().cancelAllLocalNotifications() } //发送通知消息 func scheduleNotification(itemID: Int ){ //如果已存在该通知消息,则先取消 cancelNotification(itemID) //创建UILocalNotification来进行本地消息通知 let localNotification = UILocalNotification () //推送时间(设置为30秒以后) localNotification.fireDate = NSDate (timeIntervalSinceNow: 30) //时区 localNotification.timeZone = NSTimeZone .defaultTimeZone() //推送内容 localNotification.alertBody = "来自hangge.com的本地消息" //声音 localNotification.soundName = UILocalNotificationDefaultSoundName //额外信息 localNotification.userInfo = [ "ItemID" :itemID] UIApplication .sharedApplication().scheduleLocalNotification(localNotification) } //取消通知消息 func cancelNotification(itemID: Int ){ //通过itemID获取已有的消息推送,然后删除掉,以便重新判断 let existingNotification = self .notificationForThisItem(itemID) as UILocalNotification ? if existingNotification != nil { //如果existingNotification不为nil,就取消消息推送 UIApplication .sharedApplication().cancelLocalNotification(existingNotification!) } } //通过遍历所有消息推送,通过itemid的对比,返回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,点击推送消息的响应
收到推送,如果点击推送内容,则会重新进入到App,这个时候会调用AppDelegate中的func
application(application: UIApplication, didReceiveLocalNotification
notification: UILocalNotification)代理方法。
在这个方法中我们可以根据推送的消息内容实现相关的功能。
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func application(application: UIApplication , didReceiveLocalNotification notification: UILocalNotification ) { //设定Badge数目 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)用户数据:(number)" , preferredStyle: UIAlertControllerStyle . Alert ) self .window?.rootViewController!.presentViewController(alertController, animated: true , completion: nil ) } |