目标C，如何使活动视图出现在顶部通知菜单 [英] Objective C, How to make a active view to be appeared on the top notification menu

问题描述

如果您打开iPhone电子邮件应用程序，则活动视图会显示在通知菜单顶部的Wifi图标旁边。

If you open up the iPhone email application, a active view appears on the top of the notification menu next to the Wifi icon. How can I do this?

推荐答案

[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

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