Swift

使用UILocalNotification除了可以实现本地消息的推送功能（可以设置推送内容，推送时间，提示音），还可以设置应用程序右上角的提醒个数。

下面演示如何设置，效果图如下：

--- AppDelegate.swift ---

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import UIKit   @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate {       var window: UIWindow?       func application(_ application: UIApplication, didFinishLaunchingWithOptions         launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {         //开启通知         let settings = UIUserNotificationSettings(types: [.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();     }           //发送通知消息     func scheduleNotification(){         //清除所有本地推送         UIApplication.shared.cancelAllLocalNotifications()                   //创建UILocalNotification来进行本地消息通知         let localNotification = UILocalNotification()         //设置应用程序右上角的提醒个数         localNotification.applicationIconBadgeNumber = 78;         UIApplication.shared.scheduleLocalNotification(localNotification)     }           override func didReceiveMemoryWarning() {         super.didReceiveMemoryWarning()     } }

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