iOS开发 -- loadView方法

-(void)loadView
{
//[super loadView];
//创建登陆视图
LoginView *loginView = [[LoginView alloc]initWithFrame:CGRectMake(0, 0, 50, 667)];
//将登陆视图指定为 当前视图控制器的View
self.view = loginView;
loginView.backgroundColor  = [UIColor whiteColor];

}