Swift - 设置应用程序图标的提醒个数（右上角小红圈）

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: [NSObject: AnyObject]?) -> Bool {         application.registerUserNotificationSettings(UIUserNotificationSettings(             forTypes: UIUserNotificationType.Sound | UIUserNotificationType.Alert |             UIUserNotificationType.Badge, categories: nil))         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.sharedApplication().cancelAllLocalNotifications()                   //创建UILocalNotification来进行本地消息通知         var localNotification = UILocalNotification()         //设置应用程序右上角的提醒个数         localNotification.applicationIconBadgeNumber = 78;         UIApplication.sharedApplication().scheduleLocalNotification(localNotification)     }           override func didReceiveMemoryWarning() {         super.didReceiveMemoryWarning()     } }