Swift 3归因文本解决方案

问题描述：

我有很长的字符串是这样的： “问：它是哪一天？\ nA：bla bla \ nQ：几点了？\ nA：bla bla \ nQ：它是哪一天？\ nA：bla bla \ nA：bla bla \ n“Swift 3归因文本解决方案

我的问题是我需要在textView中显示此文本，但问题必须是橙色，答案必须是灰色的颜色。我从服务器获取字符串，不知道我会得到什么，但是这样的格式。如何解决这个问题？

最困难的部分是要知道问题的确切定界符Answsers：'问：答：''之前\ N'和下一个？其余的，一旦你知道范围，它就很直接。 – Larme

您能提供分隔符吗？而且，你确定你总是可以获得这种格式吗？ –

答

如果字符串甲就像"Q: what day is it?\nA: bla bla\nQ: what time is it?\nA: bla bla\nQ: what day is it?\nA: bla bla\nQ: what time is it?\nA: bla bla\n"总是那么你可以试试下面的代码：

var str = "Q: what day is it?\nA: bla bla\nQ: what time is it?\nA: bla bla\nQ: what day is it?\nA: bla bla\nQ: what time is it?\nA: bla bla\n" 
let textView = UITextView(frame: CGRect(x: 20.0, y: 90.0, width: 250.0, height: 200.0)) 

    textView.backgroundColor = UIColor.white 

    //separate it with \n 
    let QuestionsAndAnswersArray = str.components(separatedBy: ["\n"]) 

    var finalStringArr = NSMutableAttributedString() 

    for item in QuestionsAndAnswersArray { 

     if item.characters.count > 0 { 

      let firstChar = item[item.startIndex] 

      //For Questions 
      if firstChar == "Q" { 

       //For new line after every character 
       let QuestionStr = item + "\n" 

       var myMutableString = NSMutableAttributedString() 
       myMutableString = NSMutableAttributedString(string: QuestionStr) 
       myMutableString.setAttributes([NSForegroundColorAttributeName : UIColor.red], range: NSRange(location:0,length:item.characters.count)) 
       finalStringArr.append(myMutableString) 

      } else if firstChar == "A" { //For Answers 

       let answerStr = item + "\n" 

       //For new line after every character 
       var myMutableString = NSMutableAttributedString() 
       myMutableString = NSMutableAttributedString(string: answerStr) 
       myMutableString.setAttributes([NSForegroundColorAttributeName : UIColor.gray], range: NSRange(location:0,length:item.characters.count)) 
       finalStringArr.append(myMutableString) 
      } 
     } 
    } 

    textView.attributedText = finalStringArr

而结果将是：

希望这会有所帮助。

答

问题是第一个问题后没有“\ n”。我按了一下解决了这个另一种方式：

let faqStr = "Q: what day is it?A: bla bla\nQ: what time is it?\nA: bla bla\nQ: what day is it?\nA: bla bla\nQ: what time is it?\nA: bla bla\n" 
    var faqStrArray = faqStr.components(separatedBy: "Q:") //separate by Q+A 

    faqStrArray.remove(at: 0) // [0]="" 

    let attrText = NSMutableAttributedString() 
    for i in 0..<faqStrArray.count { 
     faqStrArray[i] = "Q:\(faqStrArray[i])" // append "Q:" that was taken by separator 

     var array = faqStrArray[i].components(separatedBy: "A:") // separate to Question and Answer 
     array[1] = "A:\(array[1])\n" // append "A:" that was taken by separator 

     let attrStringOrange: NSMutableAttributedString = NSMutableAttributedString(string: array[0]) // orange string 
     attrStringOrange.addAttribute(NSForegroundColorAttributeName, value: UIColor.orange, range: NSMakeRange(0, attrStringOrange.length)) // adding attribute 
     let attrStringGrey: NSMutableAttributedString = NSMutableAttributedString(string: array[1]) // grey string 
     attrStringGrey.addAttribute(NSForegroundColorAttributeName, value: UIColor.gray, range: NSMakeRange(0, attrStringGrey.length)) // adding attribute 

     attrStringOrange.append(attrStringGrey) // appending answer to question 

     attrText.append(attrStringOrange) 
    } 

    txtView.attributedText = attrText

Swift 3归因文本解决方案

相关推荐