集成iOS推送SDK后，程勋运行后控制台日志输出：

You've implemented -[<UIApplicationDelegate> application:didReceiveRemoteNotification:fetchCompletionHandler:], but you still need to add "remote-notification" to the list of your supported UIBackgroundModes in your Info.plist。

意思是实现了application:didReceiveRemoteNotification:fetchCompletionHandler:]这个方法，但是没有在plist文件中设置。

解决：在plist文件中，添加Required background modes 类型array；添加一个item值为App downloads content in response to push notifications。这样就可消除提示日志