强调uiLabel的一部分并链接带下划线的部分

Question

我是iOS开发的新手。

我有一个标签LatestInfo，它有文字，并且有一个指向网站的链接：例如For the latest information visit example.com/latestInfo

我希望显示屏为网址example.com/latestInfo添加下划线并使其可点击。

我使用的是Swift而不是Obejective-C

我该怎么做呢？

根据皮埃尔的要求编辑：

@IBOutlet weak var linkLabel: UITextView!
let string              = "A great link : Google"
let range               = (string as NSString).rangeOfString("Google")
let attributedString    = NSMutableAttributedString(string: string)

attributedString.addAttribute(NSLinkAttributeName, value: NSURL("http://www.google.fr")!, range: range)
attributedString.addAttribute(NSUnderlineStyleAttributeName, value: NSNumber(int: 1), range: range)
attributedString.addAttribute(NSUnderlineColorAttributeName, value: UIColor.orangeColor(), range: range)

linkLabel.attributedText = attributedString 

Answer 1

查找NSMutableAttributedString，尤其是NSLinkAttributeName。有很多关于这方面的教程和Stackoverflow问题。您还可以阅读Apple关于属性字符串的文档 TextView是唯一能够打开链接的组件。所以只需用你的标签替换你的标签：

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="yes"/>
  <xsl:key match="position" name="caseMatch" use="tag1"/>

  <xsl:template match="@* | node()">
    <xsl:copy>
      <xsl:apply-templates select="@* | node()"/>
    </xsl:copy>
  </xsl:template>
  <xsl:template match="root">
    <channel>
      <xsl:for-each select="//position[count(. | key('caseMatch', tag1)[1]) = 1]">
        <position>
          <xsl:copy-of select="positionseqno"/>
          <xsl:copy-of select="tag1"/>
          <xsl:for-each select="key('caseMatch', tag1)">
            <xsl:copy-of select="*[local-name()!='positionseqno' and local-name()!='tag1']" />
          </xsl:for-each>
        </position>
      </xsl:for-each>
    </channel>
  </xsl:template>
</xsl:stylesheet>

Answer 2

Please create one UILabel & check it's properties. 
Please select Text on first changed it's to plain to Attributed.

    Now you can seen you label text in one Textfield. select that text & right click to you mouse & goto Font menu. you can seen Underline. select it. you can seen underline in your Label.

Answer 3

对于swift3.0

  override func viewDidLoad() {
     super.viewDidLoad()

  let linkAttributes = [
        NSLinkAttributeName: NSURL(string: "http://stalwartitsolution.co.in/luminutri_flow/terms-condition")!
        ] as [String : Any]
  let attributedString = NSMutableAttributedString(string: "Please tick box to confirm you agree to our Terms & Conditions, Privacy Policy, Disclaimer. ")

  attributedString.setAttributes(linkAttributes, range: NSMakeRange(44, 18))

  attributedString.addAttribute(NSUnderlineStyleAttributeName, value: NSNumber(value: 1), range: NSMakeRange(44, 18))

  textview.delegate = self
  textview.attributedText = attributedString
  textview.linkTextAttributes = [NSForegroundColorAttributeName: UIColor.red]
  textview.textColor = UIColor.white
  }


  func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
    return true
   }

Answer 4

如果您只希望将标签的一半作为下划线，则也可以使用此选项：-

对于Swift 4.0 +

let attributesForUnderLine: [NSAttributedString.Key: Any] = [
            .font: UIFont(name: AppFont.sourceSansPro_Regular, size: 12) ?? UIFont.systemFont(ofSize: 11),
            .foregroundColor: UIColor.blue,
            .underlineStyle: NSUnderlineStyle.single.rawValue]

        let attributesForNormalText: [NSAttributedString.Key: Any] = [
            .font: UIFont(name: AppFont.sourceSansPro_Regular, size: 12) ?? UIFont.systemFont(ofSize: 11),
            .foregroundColor: AppColors.ColorText_787878]

        let textToSet = "Want to change your preferences? Edit Now"
        let rangeOfUnderLine = (textToSet as NSString).range(of: "Edit Now")
        let rangeOfNormalText = (textToSet as NSString).range(of: "Want to change your preferences?")

        let attributedText = NSMutableAttributedString(string: textToSet)
        attributedText.addAttributes(attributesForUnderLine, range: rangeOfUnderLine)
        attributedText.addAttributes(attributesForNormalText, range: rangeOfNormalText)
        yourLabel.attributedText = attributedText