iOS Team / CNLiveMateCode · Files

//
//  UILabel+FormattedText.swift
//  metaCode
//
//  Created by zx on 2024/1/5.
//

import Foundation

extension UILabel {
    //计算label的行数
    func getRealLabelTextLines() -> Int {
        guard let labelText = text else {
            return 0
        }
        //计算理论上显示所有文字需要的尺寸
        let rect = CGSize(width: self.bounds.width, height: CGFloat.greatestFiniteMagnitude)
        let labelTextSize = (labelText as NSString)
            .boundingRect(with: rect, options:.usesLineFragmentOrigin,attributes: [NSAttributedString.Key.font: self.font!], context: nil)
        
        //计算理论上需要的行数
        let labelTextLines = Int(ceil(CGFloat(labelTextSize.height) / self.font.lineHeight))
        return labelTextLines
    }
}