UILabel 高度如何以编程方式在 Swift 中根据文本高度

Question

我尝试了很多解决方案，但没有得到正确的答案。

这是我的代码：

self.AhadeesView = UILabel()
self.AhadeesView.translatesAutoresizingMaskIntoConstraints = false
self.AhadeesView.backgroundColor = UIColor.orange
self.AhadeesView.numberOfLines = 0
self.AhadeesView.text = NSLocalizedString("TitleAhadees", comment: "Title Ahadees of the App")
self.AhadeesView.textAlignment = .center
self.AhadeesView.font = UIFont(name:"Jameel-Noori-Nastaleeq",size:25)
self.AhadeesView.lineBreakMode = NSLineBreakMode.byWordWrapping
//   self.AhadeesView.sizeToFit()

containerView1.addSubview(AhadeesView)

Answer 1

似乎您错过了显示标签的框架。

self.AhadeesView = UILabel(frame: [your frame value])

框架可以由

创建

let frame = CGRect(x: 0, y: 0, width: 320, height: [height_of_String])

[height_of_String] 可以通过下面的扩展来计算

您可以使用以下扩展方法计算字符串的宽度和高度

extension String {
    //To calculate the height u need to pass the width of the label and the required font size.

    func height(withConstrainedWidth width: CGFloat, font: UIFont) -> CGFloat {
        let constraintRect = CGSize(width: width, height: .greatestFiniteMagnitude)
        let boundingBox = self.boundingRect(with: constraintRect, options: .usesLineFragmentOrigin, attributes: [NSFontAttributeName: font], context: nil)
        return ceil(boundingBox.height)
    }

    func width(withConstraintedHeight height: CGFloat, font: UIFont) -> CGFloat {
        let constraintRect = CGSize(width: .greatestFiniteMagnitude, height: height)
        let boundingBox = self.boundingRect(with: constraintRect, options: .usesLineFragmentOrigin, attributes: [NSFontAttributeName: font], context: nil)
        return ceil(boundingBox.width)
     }
}