一个用于修改iOS顶部状态栏的源码，可以定制多种状态栏通知消息-Used to modify iOS status bar at the top of the source code, you can customize the status bar notification message

即时通讯的功能实现,服务器的搭建，实现 了本地局域网内的发送消息。登录和注册界面的实现，通过通知，协议来传值-The realization of the function of the instant communication, the construction of the server, realize the local sends a message in a network. Login and registration interface implementation, by n