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

我需要在UILabel中的文本部分添加一些手势。它似乎能够创建一个超链接，所以我想也可以创建一个函数调用，但我只是不知道怎么做

这是我的密码：

    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turqoise部件能够让用户遵守条款和条件或私人政策。谁能帮我解决这个问题吗？：）

您需要使用自定义方案进行普通超链接，例如

myapp://function

并在应用程序代理中实现此方法：

optional func application(_ app: UIApplication,
                          open url: URL,
                          options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    guard let scheme = url.scheme, scheme == "myapp" else { return }
    if url.absoluteString.contains("function") {
         //run code
    }
}

---

我曾经做过同样的事情，但是使用textView而不是UILabel，您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tap，这里有一些代码

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func来处理tap

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：

下面是我编写的使用标签的类

我用Swift 4更改了他对

UILabel

的回答。如果有人想与

UILabel一起使用

    let regularFontAttribute = [NSAttributedStringKey.font: UIFont(name: "Lato-Regular", size: 15.0)!]

    let boldFontAttribute = [NSAttributedStringKey.font: UIFont(name: "Lato-Bold", size: 15.0)!]
    let mattString : NSMutableAttributedString  = NSMutableAttributedString()

    let attString1 = NSMutableAttributedString(string: "By creating a profile, I accept ", attributes: regularFontAttribute)
    let anotherAttribute1 = [NSAttributedStringKey.foregroundColor: UIColor.black]
    attString1.addAttributes(anotherAttribute1, range: NSMakeRange(0, attString1.length))

    let attString2 = NSMutableAttributedString(string: "Terms and Conditions ", attributes: boldFontAttribute)
    let anotherAttribute2 = [NSAttributedStringKey.foregroundColor: UIColor.red]
    attString2.addAttributes(anotherAttribute2, range: NSMakeRange(0, attString2.length))

    let attString3 = NSMutableAttributedString(string: "and ", attributes: regularFontAttribute)
    let anotherAttribute3 = [NSAttributedStringKey.foregroundColor: UIColor.black]
    attString3.addAttributes(anotherAttribute3, range: NSMakeRange(0, attString3.length))

    let attString4 = NSMutableAttributedString(string:  "Private Policy.", attributes: boldFontAttribute)
    let anotherAttribute4 = [NSAttributedStringKey.foregroundColor: UIColor.red]
    attString4.addAttributes(anotherAttribute4, range: NSMakeRange(0, attString4.length))

    mattString.append(attString1)
    mattString.append(attString2)
    mattString.append(attString3)
    mattString.append(attString4)

    let attributes: [NSAttributedStringKey : Any] = [NSAttributedStringKey(rawValue: "link") : "termsLink"]
    let attributes2: [NSAttributedStringKey : Any] = [NSAttributedStringKey(rawValue: "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"))

    self.attributedLabel.attributedText = mattString
    self.attributedLabel.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.singleTap(_:))))
    self.attributedLabel.isUserInteractionEnabled = true

和func来处理点击和检测点击的文本

    @objc func singleTap(_ tap : UITapGestureRecognizer) {
        let attributedText = NSMutableAttributedString(attributedString: self.attributedLabel!.attributedText!)
        attributedText.addAttributes([NSAttributedStringKey.font: self.attributedLabel!.font], range: NSMakeRange(0, (self.attributedLabel!.attributedText?.string.count)!))

        // Create instances of NSLayoutManager, NSTextContainer and NSTextStorage
        let layoutManager = NSLayoutManager()
        let textContainer = NSTextContainer(size: CGSize(width: (self.attributedLabel?.frame.width)!, height: (self.attributedLabel?.frame.height)!+100))
        let textStorage = NSTextStorage(attributedString: attributedText)

        // Configure layoutManager and textStorage
        layoutManager.addTextContainer(textContainer)
        textStorage.addLayoutManager(layoutManager)

        // Configure textContainer
        textContainer.lineFragmentPadding = 0.0
        textContainer.lineBreakMode = self.attributedLabel!.lineBreakMode
        textContainer.maximumNumberOfLines = self.attributedLabel!.numberOfLines
        let labelSize = self.attributedLabel!.bounds.size
        textContainer.size = labelSize

        let tapLocation = tap.location(in: self.attributedLabel)

        // get the index of character where user tapped
        let index = layoutManager.characterIndex(for: tapLocation, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)

        if index > (self.attributedLabel.text?.count)! { return }
        var range : NSRange = NSRange()
        if let type = self.attributedLabel.attributedText?.attribute(NSAttributedStringKey(rawValue: "link"), at: index, effectiveRange: &range) as? String {

            // to get full text which was clicked
            print((self.attributedLabel.text! as NSString).substring(with: range))

            if type == "termsLink" {
                //.. do smth
                print("termsLink click")

            } else { //policyLink
                //.. do smth
                print("policyLink click")

            }
        }
    }

令人惊叹的！我使用了你的解决方案，稍加调整-现在它的工作就像一个魅力！谢谢