极光推送消息，app图标右上角红色的数字无法清除。收到通知直接点击app图标或者设置方法使得接收通知后直接跳转页面进入app，角标无法清除
解决方案：
//程序在运行时收到通知，点击通知栏进入app
- (void)jpushNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(NSInteger))completionHandler {
[UIApplication sharedApplication].applicationIconBadgeNumber = 0; [JPUSHService setBadge:0];
}
//程序在后台时收到通知，点击通知栏进入app
- (void)jpushNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)())completionHandler {
[UIApplication sharedApplication].applicationIconBadgeNumber = 0; [JPUSHService setBadge:0];
}
//点击App图标，使App从后台恢复至前台
- (void)applicationWillEnterForeground:(UIApplication *)application {
[application setApplicationIconBadgeNumber:0];
[application cancelAllLocalNotifications];
}
//按Home键使App进入后台
- (void)applicationDidEnterBackground:(UIApplication *)application{
[application setApplicationIconBadgeNumber:0];
[application cancelAllLocalNotifications];
}