如何在后台模式下仍然运行应用程序？

Question

当应用程序处于后台模式时，它如何仍然可以运行函数来获取api结果值。 当结果得到正确的值时，则更新图标徽章。

这是可能的工作吗？ 以及如何操作？

谢谢你回答我。

Answer 1

如果您已经尝试“macmoonshine”和“抢”的答案，你仍然没有得到徽章图标。

试试这个。希望能帮助到你。

目标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并用UserNotifications框架

进口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

根据需要设定UIApplication的applicationBadgeNumber。

Answer 3

试试这个斯威夫特3：

UIApplication.shared.applicationIconBadgeNumber = 1