Can'；无法在IOS中更改应用程序徽章

我试图在应用程序图标上添加徽章，但什么也没发生

UIApplication.sharedApplication().registerUserNotificationSettings(UIUserNotificationSettings(forTypes: UIUserNotificationType.Sound | UIUserNotificationType.Alert | UIUserNotificationType.Badge, categories: nil))
UIApplication.sharedApplication().applicationIconBadgeNumber = 40;

---

我是否遗漏了此代码中的某些内容？

您是否请求更改徽章？这已在iOS8中更改，需要特定权限：

let settings = UIUserNotificationSettings(forTypes: UIUserNotificationType.Badge, 
                                        categories: nil)
UIApplication.sharedApplication().registerUserNotificationSettings(settings)

---

您是否要求更改徽章？这已在iOS8中更改，需要特定权限：

let settings = UIUserNotificationSettings(forTypes: UIUserNotificationType.Badge, 
                                        categories: nil)
UIApplication.sharedApplication().registerUserNotificationSettings(settings)

---

注册远程通知

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

let settings = UIUserNotificationSettings(forTypes: UIUserNotificationType.Badge, 
                                        categories: nil)
UIApplication.sharedApplication().registerUserNotificationSettings(settings)
        return true
    }

更新您的徽章号码

UIApplication.sharedApplication().applicationIconBadgeNumber = 40;

---

注册远程通知

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

let settings = UIUserNotificationSettings(forTypes: UIUserNotificationType.Badge, 
                                        categories: nil)
UIApplication.sharedApplication().registerUserNotificationSettings(settings)
        return true
    }

更新您的徽章号码

UIApplication.sharedApplication().applicationIconBadgeNumber = 40;

---

以前的答案是旧的

iOS 10及以上版本：

let options: UNAuthorizationOptions = [.alert, .sound, .badge];             
UNUserNotificationCenter.current()(options: options) { (granted, error) in
    //print("granted: \(granted)")
    if let error = error {
        print("Error requestAuthorization: \(error.localizedDescription)")
    }                   
}

---

以前的答案是旧的

iOS 10及以上版本：

let options: UNAuthorizationOptions = [.alert, .sound, .badge];             
UNUserNotificationCenter.current()(options: options) { (granted, error) in
    //print("granted: \(granted)")
    if let error = error {
        print("Error requestAuthorization: \(error.localizedDescription)")
    }                   
}

---

我检查了你的代码，它在我的应用程序图标中显示了40个徽章。我检查了你的代码，它在我的应用程序图标中显示了40个徽章。