IOS 9.3.2 Background Remote notifications 进入后台 代理不执行

IOS 9.3.2 Background Remote notifications APP进入后台以后代理不执行

- (void)application:(UIApplication *)application
    didReceiveRemoteNotification:(NSDictionary *)userInfo
          fetchCompletionHandler:
              (void (^)(UIBackgroundFetchResult))completionHandler
{
}

。求解答。