如何在後臺模式下仍然運行應用程序？

Question

當應用程序處於後臺模式時，它如何仍然可以運行函數來獲取api結果值。 當結果得到正確的值時，則更新圖標徽章。

這是可能的工作嗎？ 以及如何操作？

謝謝你回答我。

Answer 1

如果您已經嘗試「macmoonshine」和「搶」的答案，你仍然沒有得到徽章圖標。

試試這個。希望能幫助到你。

目標C

UIUserNotificationSettings* notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil]; 

[[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings]; 

[UIApplication sharedApplication].applicationIconBadgeNumber = 1; 

**夫特3 **

let badgeCount: Int = 10 
let application = UIApplication.sharedApplication() 
application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: [.Badge, .Sound], categories: nil))   
application.applicationIconBadgeNumber = badgeCount 

夫特3並用UserNotifications框架

進口UserNotifications

let badgeCount: Int = 10 
let application = UIApplication.shared 
let center = UNUserNotificationCenter.current() 
center.requestAuthorization(options:[.badge, .alert, .sound]) { (granted, error) in 
    // Enable or disable features based on authorization. 
} 
application.registerForRemoteNotifications() 
application.applicationIconBadgeNumber = badgeCount 

Answer 2

根據需要設定UIApplication的applicationBadgeNumber。

Answer 3

試試這個斯威夫特3：

UIApplication.shared.applicationIconBadgeNumber = 1