iOS Swift3.0 富文本的使用 -- 改变行间距、添加

最近自己在写一个SwiftApp, 涉及到富文本这块, 上镜率也不是很高, 稍微做下笔记

    // 1.定义一个字符串 
    // 将String类型转换成 NSString,否则在第五步获取range时类型转换很麻烦
    let contentStr = " Swift3.0 富文本的使用@111111,改变行间距、添加点击事件@222222"  as NSString
    // 2.初始化富文本
    let nameStr : NSMutableAttributedString = NSMutableAttributedString(string:contentStr as String)
     
    // 3.添加样式 (行间距和对其方式)
    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineSpacing = 6
    paragraphStyle.alignment = .left
    // 4.行间距
    nameStr.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: NSMakeRange(0, contentStr.length))
    // 5.关键代码 添加事件
    let range = contentStr.range(of: "@111111", options: .regularExpression, range: NSMakeRange(0,contentStr.length))
    let range1 = contentStr.range(of: "@222222", options: .regularExpression, range: NSMakeRange(0,contentStr.length))
    nameStr.addAttribute(NSLinkAttributeName, value: "frist://", range: range)
    nameStr.addAttribute(NSLinkAttributeName, value: "second://", range: range1)
    
    // 6.赋值
    textView.attributedText = nameStr

    textView.isEditable = false
    textView.delegate = self  
    textView.font = UIFont.systemFont(ofSize: 12)
    youView.addSubview(textView)
    textView.snp.makeConstraints { (make) in
        //...
    }

然后在UITextViewDelegate中处理事件

    // MARK: - UITextViewDelegate
    func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool { 
        if URL.scheme == "frist" {
            print("点击@111111")
            return false
        }
        if URL.scheme == "second" {
            print("点击222222")
            return false
        }
        return true
    }  

暂时涉及到的用法就这些, 以后用得到继续补充