iOS - UILabel

Posted 2021-02-02 ios-development

import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        //创建Label并设置位置
        let label = UILabel(frame: CGRect(x: 150,y:250 , width: 100, height: 100))
        //设置文本内容
        label.text = "文本内容"
        //添加到视图中
        self.view.addSubview(label)
        //设置文字颜色及背景颜色
        label.textColor = UIColor.green
        label.backgroundColor = UIColor.orange
        //文字对其方式
        label.textAlignment = .right //右对齐
        //文字阴影设置
        label.shadowColor = UIColor.gray//灰色阴影
        label.shadowOffset = CGSize(width: 2,height: 2)
        //字体及大小设置
        label.font = UIFont.systemFont(ofSize: 18)//自定义字体
        label.font = UIFont.systemFont(ofSize:17)//系统字体
        //内容文字过长的省略方式
        label.lineBreakMode = .byClipping//超出部分裁剪
        label.lineBreakMode = .byCharWrapping//以字母结尾换行
        label.lineBreakMode = .byTruncatingHead//将头部超出部分省略号代替
        label.lineBreakMode = .byTruncatingTail//将尾部超出部分省略号代替
        label.lineBreakMode = .byWordWrapping//以单词结尾换行
        label.lineBreakMode = .byTruncatingMiddle//将中间部分超出部分省略号代替
        //文字大小自适应标签高度
        label.adjustsFontSizeToFitWidth = true//当文字超出标签宽度时，自动调整文字大小，使其不被截断
        //设置显示行数
        label.numberOfLines = 2//当numberOfLine为0时行数不受限制
        //设置文本高亮
        label.isHighlighted = true
        //设置文本高亮颜色
        label.highlightedTextColor = UIColor.red
        //富文本设置
        let attributedString = NSMutableAttributedString(string: "for Development")
        
        attributedString.addAttribute(NSAttributedString.Key.font, value: UIFont(name: "Farah", size: 18)!,range: NSRange(location: 0, length: 5))
        
        attributedString.addAttribute(NSAttributedString.Key.strokeWidth, value: 3, range: NSMakeRange(6, 9))
        
        attributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: 1, range:NSRange(location: 16, length: 3))
        
        label.attributedText = attributedString
        
    }
    
}