iPhone中点击按钮修改视图

Question

做了一个iPhone项目。我想要通过点击按钮加载一个UIView，充填一半屏幕。

Answer 1

UIView *customView =[UIView alloc]initWithFrame:CGRectMake(10,100,200,200);//Give frame according to your view 
customView.backgroundColor=[UIColor greenColor];
[Self.view addSubView: customView];