点击关闭按钮隐藏subView

iPhone应用中，添加subView到窗口，还要实现一个功能，在点击关闭按钮是，应该subView隐藏起来，这是创建subView的代码：

 UIView*subView=[[UIView alloc]initWithFrame:CGRectMake(0,0, 1024,768)];
 subView.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"bgPopupback.png"]];
 UIWindow* window = [UIApplication sharedApplication].keyWindow;
 if (!window) 
    window = [[UIApplication sharedApplication].windows objectAtIndex:0];
 [[[window subviews] objectAtIndex:0] addSubview:subView];  

关闭按钮：

  -(void)closeButtonAction{
  NSLog(@"CLicked on this button");
  [subView removeFromSuperview] ; 
  self.tableView.userInteractionEnabled=TRUE;

}

使用removefromsuperview删除subView，如果只是想隐藏 subView.hidden = YES;，在按钮动作内执行。

viewDidLoad()
{
UIButton *m_btnSample = [UIButton buttonWithType:UIButtonTypeCustom];
    [m_btnSample setFrame:CGRectMake(200, 300, 200, 40)];
    [m_btnSample setImage:[UIImage imageNamed:@"smiley1.jpg"] forState:UIControlStateNormal];
    [m_btnSample addTarget:self action:@selector(btnChanged) forControlEvents:UIControlStateHighlighted];
    [self.view addSubview:m_btnSample];
}

 -(void)btnChanged
    {
        [viewYouWantToRemove removeFromSuperview];

    }