Question

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

这是可行的吗？怎么办？

谢谢你的回答。

Answer 1

根据需要设置UIApplication的{{3}}。

Answer 2

试试这个 Swift 3 ：

UIApplication.shared.applicationIconBadgeNumber = 1

Answer 3

如果你已经尝试了＆＃34; macmoonshine＆＃34;和＃34; Rob＆＃34;的答案，但你仍然没有获得徽章图标。

试试这个。希望能帮助到你。

<强>目标C

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

[[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];

[UIApplication sharedApplication].applicationIconBadgeNumber = 1;

** Swift 3 **

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

Swift 3和UserNotifications框架

导入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

如何在应用程序处于后台模式时仍然运行功能？

3 个答案: