swift - 带有边框和背景问题的 UILabel

Question

这是我的 UILabel 代码

descriptionText.layer.cornerRadius     = 8
descriptionText.layer.borderColor      = UIColor.lightGray.cgColor
descriptionText.layer.borderWidth      = 2
descriptionText.text                   = ""
descriptionText.layer.shadowOffset     = CGSize(width: -10, height: -10)
descriptionText.layer.shadowRadius     = -5.0
descriptionText.backgroundColor        = .white
descriptionText.textColor              = .black
descriptionText.numberOfLines          = 0
descriptionText.lineBreakMode          = .byWordWrapping

然而这就是它的样子

为什么角不透明或如何使边界外的部分透明

提前致谢

Answer 1

您需要通过将标签上的 .clipsToBounds 设置为 true 来隐藏 cornerRadius 之外的所有内容。问题是如果你这样做你会失去阴影，因为这也在边界之外。试试这个:

将标签放在容器 View 内，将标签限制在容器边缘，并为其创建导出。然后试试下面的代码:

containerView.borderColor = UIColor.lightGray.cgColor
containerView.layer.borderColor = UIColor.lightGray.cgColor
containerView.layer.borderWidth = 2
containerView.layer.shadowOffset = CGSize(width: -10, height: -10)
containerView.layer.shadowRadius = -5.0
containerView.backgroundColor = UIColor.clear

descriptionText.text = "Testing"
descriptionText.cornerRadius = 8
descriptionText.clipsToBounds = true // or descriptionText.layer.masksToBounds = true
descriptionText.backgroundColor = .white
descriptionText.textColor = .black
descriptionText.numberOfLines = 0
descriptionText.lineBreakMode = .byWordWrapping