Swift - UIKit - UILabel

UILabel.swift

import UIKit

extension UILabel {
    /// The number of lines required by the containing text taking into account the font line height.
    var lines: Int {
        guard let text = self.text as? NSString else { return 0 }
        let size = CGSize(width: self.bounds.width, height: CGFloat.greatestFiniteMagnitude)
        let labelSize = text.boundingRect(
            with: size,
            options: .usesLineFragmentOrigin,
            attributes: [
                .font: self.font as Any
            ],
            context: nil)
        return Int(ceil(CGFloat(labelSize.height) / self.font.lineHeight))
    }
}