Swift 富文本 NSMutableAttributedString的简单用法

    let titleLabe = UILabel()
    titleLabe.frame = CGRect(x: 0, y: 0, width: frame.size.width, height: 50)
    
    let testStr = "天天涨停板，哈哈"
    let attributeStr = NSMutableAttributedString(string: testStr)
    attributeStr.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.red, range: NSMakeRange(0, 6))
    attributeStr.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 18), range: NSMakeRange(0, 6))
    attributeStr.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 12), range: NSMakeRange(testStr.count - 3, 3))
    attributeStr.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.yellow, range: NSMakeRange(testStr.count - 3, 3))
    
    let attach = NSTextAttachment()
    attach.image = UIImage(named: "icon.jpg")
    attach.bounds = CGRect(x: 0, y: 0, width: 40, height: 40)
    let attachStr = NSAttributedString(attachment: attach)
    attributeStr.insert(attachStr, at: 5)
    
    titleLabe.attributedText = attributeStr
    
    addSubview(titleLabe)