swift 如何在IOS應用圖標上添加消息數

　　在應用圖標右上角添加消息數提醒，可以很方便的告知用戶該應用中有無新消息需要處理。下麵用xcode 7.3.1來簡要說明一下如何用swift語言進行此功能的實現。

1、修改 AppDelegate.swift

 1 //
 2 //  AppDelegate.swift
 3 //  RainbowDemo
 4 //
 5 //  Created by Jackwang on 16/8/17.
 6 //  Copyright © 2016年 Jackwang . All rights reserved.
 7 //
 8 
 9 import UIKit
10 
11 @UIApplicationMain
12 class AppDelegate: UIResponder, UIApplicationDelegate {
13 
14     var window: UIWindow?
15 
16 
17     func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
18         // Override point for customization after application launch.
19         //使用UILocalNotification除了可以實現本地消息的推送功能（可以設置推送內容，推送時間，提示音），
20         //還可以設置應用程式右上角的提醒個數。
21         let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound],
22                                                   categories: nil)
23         application.registerUserNotificationSettings(settings)
24         
25         
26         return true
27     }
28 
29     func applicationWillResignActive(application: UIApplication) {
30         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
31         // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
32     }
33 
34     func applicationDidEnterBackground(application: UIApplication) {
35         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
36         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
37     }
38 
39     func applicationWillEnterForeground(application: UIApplication) {
40         // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
41     }
42 
43     func applicationDidBecomeActive(application: UIApplication) {
44         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
45     }
46 
47     func applicationWillTerminate(application: UIApplication) {
48         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
49     }
50 
51 
52 }

2 修改在ViewController.swift

 1 //
 2 //  ViewController.swift
 3 //  RainbowDemo
 4 //
 5 //  Created by jackwang on 16/8/17.
 6 //  Copyright © 2016年 jackwang. All rights reserved.
 7 //
 8 
 9 import UIKit
10 
11 class ViewController: UIViewController {
12 
13     override func viewDidLoad() {
14         super.viewDidLoad()
15         // Do any additional setup after loading the view, typically from a nib.
16         //發送通知消息
17         scheduleNotification();
18     }
19     
20     //發送通知消息
21     func scheduleNotification(){
22         //清除所有本地推送
23         UIApplication.sharedApplication().cancelAllLocalNotifications()
24         
25         //創建UILocalNotification來進行本地消息通知
26         let localNotification = UILocalNotification()
27         //設置應用程式右上角的提醒個數
28         localNotification.applicationIconBadgeNumber = 8;
29         UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
30     }
31 
32     override func didReceiveMemoryWarning() {
33         super.didReceiveMemoryWarning()
34         // Dispose of any resources that can be recreated.
35     }
36 
37 
38 }

3 編譯運行

第一次會彈出詢問是否允許推送消息，確認後，第二次運行該app後，會在圖標右上角標註消息數，如下圖所示：

修改APP的顯示名稱，可以單擊info.plist，然後修改器Bundle name,如下圖所示：