ios - 如何将函数调用(不是超链接)添加到 UILabel 中的 NSAttributedString 的一部分？

Question

我需要在 UILabel 中的文本的某些部分添加一些 tapGestures。它似乎能够创建一个超链接 - 所以我想它也可以进行函数调用，但我只是不确定该怎么做。

这是我的代码:

    let regularFont = UIFont(name: Constants.robotoRegular, size: 13)!
    let att1 = [NSFontAttributeName: regularFont]

    let turqoiseFont = UIFont(name: Constants.robotoBold, size: 13)!
    let att2 = [NSFontAttributeName: turqoiseFont]

    let attString1 = NSMutableAttributedString(string: "By creating a profile, I accept ", attributes: att1)
    attString1.addAttribute(NSForegroundColorAttributeName, value: UIColor.darkGrayColor(), range: NSMakeRange(0, attString1.length))

    let attString2 = NSMutableAttributedString(string: "Terms and Conditions ", attributes: att2)
    attString2.addAttribute(NSForegroundColorAttributeName, value: Colors.loginButtonColor, range: NSMakeRange(0, attString2.length))

    let attString3 = NSMutableAttributedString(string: "and ", attributes: att1)
    attString3.addAttribute(NSForegroundColorAttributeName, value: UIColor.darkGrayColor(), range: NSMakeRange(0, attString3.length))

    let attString4 = NSMutableAttributedString(string: "Private Policy.", attributes: att2)
    attString4.addAttribute(NSForegroundColorAttributeName, value: Colors.loginButtonColor, range: NSMakeRange(0, attString4.length))

    let index = "\(attString1.string.endIndex)"

    attString1.insertAttributedString(attString4, atIndex: Int(index)!)
    attString1.insertAttributedString(attString3, atIndex: Int(index)!)
    attString1.insertAttributedString(attString2, atIndex: Int(index)!)

    termsAndConditionLabel.attributedText = attString1

我希望绿松石部分能够将用户带到条款和条件或隐私政策。谁能帮我解决这个问题？ :))

Answer 1

我曾经做过同样的事情，但是使用 textView 而不是 UILabel，你应该创建自己的属性，并将它们添加到属性字符串中，然后处理点击，这里是一些代码

你的代码和我的修改

   let regularFont = UIFont(name: "HelveticaNeue", size: 13)!
    let att1 = [NSFontAttributeName: regularFont]

    let turqoiseFont = UIFont(name: "HelveticaNeue", size: 13)!
    let att2 = [NSFontAttributeName: turqoiseFont]
    let mattString : NSMutableAttributedString  = NSMutableAttributedString()
    let attString1 = NSMutableAttributedString(string: "By creating a profile, I accept ", attributes: att1)
    attString1.addAttribute(NSForegroundColorAttributeName, value: UIColor.darkGray, range: NSMakeRange(0, attString1.length))
    let attString2 = NSMutableAttributedString(string: "Terms and Conditions ", attributes: att2)
    attString2.addAttribute(NSForegroundColorAttributeName, value: UIColor.red, range: NSMakeRange(0, attString2.length))
    let attString3 = NSMutableAttributedString(string: "and ", attributes: att1)
    attString3.addAttribute(NSForegroundColorAttributeName, value: UIColor.darkGray, range: NSMakeRange(0, attString3.length))
    let attString4 = NSMutableAttributedString(string: "Private Policy.", attributes: att2)
    attString4.addAttribute(NSForegroundColorAttributeName, value: UIColor.red, range: NSMakeRange(0, attString4.length))
    mattString.append(attString1)
    mattString.append(attString2)
    mattString.append(attString3)
    mattString.append(attString4)
    let attributes = ["link" : "termsLink"]
    let attributes2 = ["link" : "policyLink"]
    let str : NSString = mattString.string as NSString
    mattString.addAttributes(attributes, range: str.range(of: "Terms and Conditions"))
    mattString.addAttributes(attributes2, range: str.range(of: "Private Policy"))
    _textView.attributedText = mattString
    _textView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.singleTap(tap:)))) 

和处理点击的函数

func singleTap(tap : UITapGestureRecognizer) {
    let layoutManager = _textView.layoutManager
    let location = tap.location(in: _textView)
    let index = layoutManager.characterIndex(for: location, in: _textView.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
    if index > _textView.textStorage.length {return}
    var range : NSRange = NSRange()
    if let type = _textView.attributedText.attribute("link", at: index, effectiveRange: &range) as? String {
        if type == "termsLink" {
            //.. do smth
        } else {
            //.. do smth
        }
    }
}

更新:

这是我写的使用Label的类

https://github.com/barbados88/TapableLabel/blob/master/TapableLabel.swift