如何从索引中删除UIImageView？

Question

我正在开发一个益智游戏，我添加了所有图像视图到NSMutableArray但我想删除它的第一阵列，它是在指数0我的代码是：

override func viewDidLoad() { 
    super.viewDidLoad() 

    var allImageViews : NSMutableArray = NSMutableArray() 

    var xCen :CGFloat = 53 
    var yCen :CGFloat = 94 

    for v in 0...2{ 

     for h in 0...2{ 

      let filename = String(format: "kat_%02i.gif", h+v*3) 
      let Image = UIImage(named: filename) 
      let myImageView = UIImageView(image: Image) 
      myImageView.frame = CGRectMake(0, 0, 106, 189) 
      myImageView.center = CGPointMake(xCen, yCen) 
      myImageView.userInteractionEnabled = true 
      allImageViews.addObject(myImageView) 
      self.view.addSubview(myImageView) 
      xCen += 106 
     } 
     xCen = 53 
     yCen += 189 
    } 
    allImageViews.removeObjectAtIndex(0) 

} 

我想我从指数，但其删除对象当我运行项目时仍然出现，所以任何人都可以告诉我如何从超级视图中删除第一个图像？

Answer 1

就叫removeFromSuperview的观点从阵列中取出前：

allImageViews[0].removeFromSuperview() 
allImageViews.removeObjectAtIndex(0) 

如果您使用的是斯威夫特阵列代替NSMutableArray，那么你得到更多类型 安全，你可以采取这样的事实优势removeAtIndex()返回 删除的元素：

override func viewDidLoad() { 
    super.viewDidLoad() 

    var allImageViews : [UIImageView] = [] 

    var xCen :CGFloat = 53 
    var yCen :CGFloat = 94 

    for v in 0...2{ 

     for h in 0...2{ 

      let filename = String(format: "kat_%02i.gif", h+v*3) 
      let Image = UIImage(named: filename) 
      let myImageView = UIImageView(image: Image) 
      myImageView.frame = CGRectMake(0, 0, 106, 189) 
      myImageView.center = CGPointMake(xCen, yCen) 
      myImageView.userInteractionEnabled = true 
      allImageViews.append(myImageView) 
      self.view.addSubview(myImageView) 
      xCen += 106 
     } 
     xCen = 53 
     yCen += 189 
    } 

    allImageViews.removeAtIndex(0).removeFromSuperview() 
}