Question

我有一个textView
当我点击textview的某个特定区域时，我会找到行号，但我无法获取该行的文字

我需要获取特定行的文本，并在textview中仅更改该文本的颜色

 func HandleTapped(sender: UITapGestureRecognizer)
 {
     print("tapped")
     if sender.state == .recognized {
         let location = sender.location(ofTouch: 0, in: TextView)
         print(location)
         if location.y >= 0 && location.y <= TextView.contentSize.height {
        guard let font = TextView.font else {
            return
         }
        let line = Int((location.y - TextView.textContainerInset.top) / font.lineHeight) + 1
        print("Line is \(line)")
        let text=TextView.textContainer
        print(text)


       }
   }
}

Answer 1

将此扩展名用于UITextView以获取当前行所选的文本行：

func getLineString() -> String {
    return (self.text! as NSString).substringWithRange((self.text! as NSString).lineRangeForRange(self.selectedRange))
}

然后，您需要将所有文本更改为属性文本，并将所选行文本的范围更改为高亮颜色。类似的东西：

let allText = textView.text
let lineText = textView.getLineString()

let attrText = NSMutableAttributedString(string: allText)

let regularFont = UIFont(name: "Arial", size: 30.0)! // Make this whatever you need
let highlightFont = UIFont(name: "Arial-BoldMT", size: 30.0)! // Make this whatever you need

//  Convert allText to NSString because attrText.addAttribute takes an NSRange.
let allTextRange = (allText as NSString).rangeOfString(allText)
let lineTextRange = (allText as NSString).rangeOfString(lineText)

attrText.addAttribute(NSFontAttributeName, value: regularFont, range: allTextRange)
attrText.addAttribute(NSFontAttributeName, value: highlightFont, range: lineTextRange)

textView.attributedText = attrText

当我在特定的地方点击UITextView时，我想要更改该特定行的颜色

1 个答案: