如何在单个标签中点击多个单词

如何解决如何在单个标签中点击多个单词

我是 swift 的新手，我想在每个词上获得多个可点击的词和不同的点击手势

例如：-“请正确阅读条款和条件以及隐私政策”我需要点击“条款和条件”并打印（“条款”），当点击“隐私政策”时，它应该打印（“隐私”）

我尝试了一些东西，但没有按预期正确输出

let txt = NSMutableAttributedString(string: labelCreateAccount.text!)
        let range = (labelCreateAccount.text! as Nsstring).range(of: "Term & Condition")
        let range1 = (labelCreateAccount.text! as Nsstring).range(of: "Privacy Policy")
        
        txt.addAttributes([NSAttributedString.Key.foregroundColor : UIColor.red],range: range)
        txt.addAttributes([NSAttributedString.Key.foregroundColor : UIColor.red],range: range1)
        labelCreateAccount.addGestureRecognizer(UITapGestureRecognizer(target:range,action: #selector(LabelTapAccount)))

        labelCreateAccount.addGestureRecognizer(UITapGestureRecognizer(target:range 1,action: #selector(LabelTapAccount)))

        labelCreateAccount.attributedText = txt
        labelCreateAccount.isUserInteractionEnabled = true

解决方法

创建扩展 UITapGestureRecognizer

extension UITapGestureRecognizer {

    func didTapAttributedTextInLabel(label: UILabel,inRange targetRange: NSRange) -> Bool {
        
        let layoutManager = NSLayoutManager()
        let textContainer = NSTextContainer(size: CGSize.zero)
        let textStorage = NSTextStorage(attributedString: label.attributedText!)
        
        layoutManager.addTextContainer(textContainer)
        textStorage.addLayoutManager(layoutManager)
        
        textContainer.lineFragmentPadding = 0.0
        textContainer.lineBreakMode = label.lineBreakMode
        textContainer.maximumNumberOfLines = label.numberOfLines
        let labelSize = label.bounds.size
        textContainer.size = labelSize
        
        let locationOfTouchInLabel = self.location(in: label)
        let textBoundingBox = layoutManager.usedRect(for: textContainer)
        let textContainerOffset = CGPoint(x: (labelSize.width - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x,y: (labelSize.height - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y);
        let locationOfTouchInTextContainer = CGPoint(x: (locationOfTouchInLabel.x - textContainerOffset.x),y: 0 );
        
        let lineModifier = Int(ceil(locationOfTouchInLabel.y / label.font.lineHeight)) - 1
        let rightMostFirstLinePoint = CGPoint(x: labelSize.width,y: 0)
        let charsPerLine = layoutManager.characterIndex(for: rightMostFirstLinePoint,in: textContainer,fractionOfDistanceBetweenInsertionPoints: nil)
        
        let indexOfCharacter = layoutManager.characterIndex(for: locationOfTouchInTextContainer,fractionOfDistanceBetweenInsertionPoints: nil)
        let adjustedRange = indexOfCharacter + (lineModifier * charsPerLine)
        
        return NSLocationInRange(adjustedRange,targetRange)
    }
    
}

extension Range where Bound == String.Index {
    var nsRange: NSRange {
        return NSRange(location: self.lowerBound.encodedOffset,length: self.upperBound.encodedOffset -
                        self.lowerBound.encodedOffset)
    }
}

将 TapGesture 添加到目标标签和侦听器，检查从属性文本中点击的目标字符串：

@objc private func settingTapped(_ sender: UITapGestureRecognizer) {
    guard let range = self.yourLabel.text?.range(of: "your Text")?.nsRange else {
        return
    }
    
    if sender.didTapAttributedTextInLabel(label: self.yourLabel,inRange: range) {
        // your work
    }
    
}

现在设置点击标签：

let txt = NSMutableAttributedString(string: labelCreateAccount.text!)
            let range = (labelCreateAccount.text! as NSString).range(of: "Term & Condition")
            let range1 = (labelCreateAccount.text! as NSString).range(of: "Privacy Policy")
            
            txt.addAttributes([NSAttributedString.Key.foregroundColor : UIColor.red],range: range)
            txt.addAttributes([NSAttributedString.Key.foregroundColor : UIColor.red],range: range1)

            labelCreateAccount.attributedText = txt
            
            let tap = UITapGestureRecognizer.init(target: self,action: #selector(self.settingTapped(_:)))
            self.labelCreateAccount.addGestureRecognizer(tap)
            self.labelCreateAccount.isUserInteractionEnabled = true