我在我的应用程序中使用推送通知服务。当应用程序在后台时,我可以在通知屏幕上看到通知(当我们从 iOS 设备顶部向下滑动时显示的屏幕)。但是如果应用程序在前台,委托(delegate)方法
- (void)application:(UIApplication*)application didReceiveRemoteNotification:(NSDictionary*)userInfo
正在被调用,但通知屏幕中未显示通知。
我想在通知屏幕上显示通知,无论应用程序是在后台还是前台。我厌倦了寻找解决方案。非常感谢任何帮助。
最佳答案
要在应用程序处于前台时显示横幅消息,请使用以下方法。
iOS 10,Swift 3/4:
// This method will be called when app received push notifications in foreground
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
completionHandler([.alert, .badge, .sound])
}
iOS 10、Swift 2.3:
@available(iOS 10.0, *)
func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void)
{
//Handle the notification
completionHandler(
[UNNotificationPresentationOptions.Alert,
UNNotificationPresentationOptions.Sound,
UNNotificationPresentationOptions.Badge])
}
您还必须将您的应用代理注册为通知中心的代理:
import UserNotifications
// snip!
class AppDelegate : UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate
// snip!
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// set the delegate in didFinishLaunchingWithOptions
UNUserNotificationCenter.current().delegate = self
...
}
关于iphone - 在iOS前台应用程序时获取推送通知,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14872088/