swift iOS Swift：如何检查UILabel是否被截断？计算UILabel的行数

Posted 2021-05-19

func countLabelLines(label: UILabel) -> Int {
    // Call self.layoutIfNeeded() if your view uses auto layout
    let myText = label.text! as NSString

    let rect = CGSize(width: label.bounds.width, height: CGFloat.greatestFiniteMagnitude)
    let labelSize = myText.boundingRect(with: rect, options: .usesLineFragmentOrigin, attributes: [NSAttributedStringKey.font: label.font], context: nil)

    return Int(ceil(CGFloat(labelSize.height) / label.font.lineHeight))
}