圆角改变UIView的大小

2 回答

• 1

  这是因为一旦调整了Header View的约束，你的CAShapeLayer就不会自动调整大小 . 每当调整视图大小时，您都需要更新路径：

  let headerView: UIView!
  
    override func awakeFromNib() {
      super.awakeFromNib()
  
      headerView = UIView(frame: bounds)
      headerView.frame = bounds
  
      headerView.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 8).isActive = true
      headerView.topAnchor.constraint(equalTo: self.topAnchor, constant: 4).isActive = true
      headerView.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -8).isActive = true
      headerView.heightAnchor.constraint(equalToConstant: 40).isActive = true
  
  
      let rectShape = CAShapeLayer()
      rectShape.bounds = headerView.layer.frame
      rectShape.position = headerView.center
  
      headerView.layer.backgroundColor = UIColor.green.cgColor
      headerView.layer.mask = rectShape
    }
  
    override func layoutSubviews() {
      super.layoutSubviews()
  
      rectShape.path = UIBezierPath(roundedRect: headerView.layer.bounds, byRoundingCorners: [ .topLeft, .topRight], cornerRadii: CGSize(width: 10, height: 10)).cgPath
    }
  

  我以awakeFromNib为例 . 您的自定义UITableViewCell类的视图设置可能有所不同 .

  回复于 2024-05-04T09:35:31+08:00
• 0

  可能，在调整视图大小以适应表之前，您将获得headerView边界 .

  如果在子类UIView中，你应该这样做

  override func layoutSubviews() {
      // update path and mask here
  }
  

  回复于 2024-05-04T09:35:31+08:00