iPhone开发 No IB 添加控件

//添加uinav上的按钮

UIBarButtonItem* rbutton=[[UIBarButtonItemalloc] initWithTitle:@"登录"style:UIBarButtonItemStyleDonetarget:selfaction:@selector(btnLogin)];

self.navigationItem.rightBarButtonItem=rbutton;

UIBarButtonItem* lbutton=[[UIBarButtonItemalloc] initWithTitle:@"退出"style:UIBarButtonItemStyleDonetarget:selfaction:@selector(AppExit)];

self.navigationItem.leftBarButtonItem=lbutton;