如何在UILabel中添加函数调用(不是超链接)到NSAttributedString的一部分？

Question

我需要在文本的某些部分添加一些tapGestures,即UILabel中的那些部分.它似乎能够创建一个超链接 - 所以我想它也可以做一个函数调用,但我只是不知道该怎么做.

继承我的代码:

    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turqoise部分能够将用户带到条款和条件,或私人政策.任何人都可以帮我解决这个问题吗？:))

Answer 1

我曾经做过同样的事情,但是使用textView代替UILabel,你应该创建自己的属性,并将它们添加到属性字符串,然后处理tap,这里有一些代码

你的代码与我的修改

   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处理水龙头

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