ios - UILabel 调整其 SuperView 的大小？

Question

我有以下 View ，其中包含 UILabel:

class MyView : UIView {

  func viewDidLoad() {

    self.autoresizingMask = UIViewAutoresizing.FlexibleHeight | UIViewAutoresizing.FlexibleWidth

    bottomView = UIView(frame: CGRectMake(self.bounds.origin.x, self.bounds.origin.y + self.imageView!.bounds.size.width, self.bounds.size.width, self.bounds.size.height - self.imageView!.bounds.size.height))

    // bottomView frame calculation is: (0.0, 355.0, 355.0, 130.0)

    bottomView?.backgroundColor = UIColor.greenColor()
    bottomView?.autoresizingMask = UIViewAutoresizing.FlexibleWidth
    bottomView?.clipsToBounds = true
    self.addSubview(self.bottomView!)

    var descriptionRect: CGRect = CGRectInset(self.bottomView!.bounds, leftRightInset, 20/2)
    let descriptionLabel = UILabel()
    descriptionLabel.numberOfLines = 3
    descriptionLabel.autoresizingMask = UIViewAutoresizing.FlexibleWidth
    descriptionLabel.font = UIFont(name: MGFont.helvetica, size: 22)
    descriptionLabel.textColor = UIColor.whiteColor()
    descriptionLabel.textAlignment = NSTextAlignment.Left
    descriptionLabel.backgroundColor = UIColor.blueColor()
    var paragraphStyle:NSMutableParagraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineSpacing = 1.0
    paragraphStyle.lineBreakMode = NSLineBreakMode.ByTruncatingTail
    let attributes = [NSParagraphStyleAttributeName : paragraphStyle]
    descriptionLabel.attributedText = NSAttributedString(string: previewCard.title, attributes:attributes)
    bottomView?.addSubview(descriptionLabel)

    descriptionLabel.bounds = descriptionRect
    descriptionLabel.sizeToFit()
    descriptionLabel.center = CGPointMake(bottomView!.bounds.width/2, bottomView!.bounds.height/2 - hotelNameLableHeight/2) 

  }     

}

bottomView 的高度应始终固定。

MyView 在运行时调整大小。这意味着绿色底部 View 的尺寸也会增加。

这是标签有两行和三行时的结果:

UILabel 似乎调整了其 super View 的大小。

请注意，我不使用自动布局。

  override func layoutSubviews() {
    super.layoutSubviews()
  }

如何防止 UILabel 调整其 SuperView 的大小？

编辑:我还尝试评论 bottomView?.clipsToBounds = true

Answer 1

覆盖 super View 的 setFrame: 和 setBounds:(如果它们是普通 UIView 的子类)，添加断点，然后查看堆栈跟踪以找出导致它们调整大小的原因。