如何在我的代码中将View从底部移动到顶部:colorView.hidden=NO;colorView=[[UIViewalloc]init];colorView.frame=CGRectMake(0,480,320,480);colorView.bounds=CGRectMake(0,200,320,280);colorView.backgroundColor=[UIColorgreenColor];colorView.alpha=1.0f;[webViewaddSubview:colorView];[self.viewaddSubview:webView];[selfcreateT