来自@AliSoftware OHAttributedStringAdditions的优秀库可以很容易地在UILabel中添加链接，这里是文档:https://github.com/AliSoftware/OHAttributedStringAdditions/wiki/link-in-UILabel

我写了一个方法，添加一个链接(linkString)到一个字符串(fullString)与特定的url(urlString):

- (NSAttributedString *)linkedStringFromFullString:(NSString *)fullString withLinkString:(NSString *)linkString andUrlString:(NSString *)urlString
{
    NSRange range = [fullString rangeOfString:linkString options:NSLiteralSearch];
    NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:fullString];

    NSMutableParagraphStyle *paragraphStyle = NSMutableParagraphStyle.new;
    paragraphStyle.alignment = NSTextAlignmentCenter;
    NSDictionary *attributes = @{NSForegroundColorAttributeName:RGB(0x999999),
                                 NSFontAttributeName:[UIFont fontWithName:@"HelveticaNeue-Light" size:10],
                                 NSParagraphStyleAttributeName:paragraphStyle};
    [str addAttributes:attributes range:NSMakeRange(0, [str length])];
    [str addAttribute: NSLinkAttributeName value:urlString range:range];

    return str;
}

你应该这样称呼它:

NSString *fullString = @"A man who bought the Google.com domain name for $12 and owned it for about a minute has been rewarded by Google for uncovering the flaw.";
NSString *linkString = @"Google.com";
NSString *urlString = @"http://www.google.com";

_youTextView.attributedText = [self linkedStringFromFullString:fullString withLinkString:linkString andUrlString:urlString];

我只是创建了UILabel的一个子类来专门处理这样的用例。您可以轻松地添加多个链接并为它们定义不同的处理程序。它还支持突出显示按下的链接时，你触摸触摸反馈。请参考https://github.com/null09264/FRHyperLabel。

在你的例子中，代码可能是这样的:

FRHyperLabel *label = [FRHyperLabel new];

NSString *string = @"This morph was generated with Face Dancer, Click to view in the app store.";
NSDictionary *attributes = @{NSFontAttributeName: [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline]};

label.attributedText = [[NSAttributedString alloc]initWithString:string attributes:attributes];

[label setLinkForSubstring:@"Face Dancer" withLinkHandler:^(FRHyperLabel *label, NSString *substring){
    [[UIApplication sharedApplication] openURL:aURL];
}];

示例截图(在这种情况下，处理程序被设置为弹出警报而不是打开url)

更新:

我的问题有两个关键部分:

如何创建一个链接，其中显示的可点击链接的文本与被调用的实际链接不同: 如何在不使用自定义代码设置文本属性的情况下设置链接。

iOS 7增加了从NSData中加载属性文本的功能。

我创建了一个UITextView的自定义子类，它利用了@IBInspectable属性，让你直接在IB中加载RTF文件中的内容。

以下是细节:

In iOS 7, NSAttributedString gained the method initWithData:options:documentAttributes:error:. That method lets you load an NSAttributedString from an NSData object. You can first load an RTF file into NSData, then use initWithData:options:documentAttributes:error: to load that NSData into your text view. (Note that there is also a method initWithFileURL:options:documentAttributes:error: that will load an attributed string directly from a file, but that method was deprecated in iOS 9. It's safer to use the method initWithData:options:documentAttributes:error:, which wasn't deprecated.

我想要一种方法，让我安装可点击的链接到我的文本视图，而不必创建任何特定于我正在使用的链接的代码。

我想出的解决方案是创建一个UITextView的自定义子类，我调用RTF_UITextView并给它一个名为RTF_Filename的@IBInspectable属性。将@IBInspectable属性添加到属性中会导致接口构建器在“属性检查器”中公开该属性。然后，您可以从IB设置该值，而无需自定义代码。

I also added an @IBDesignable attribute to my custom class. The @IBDesignable attribute tells Xcode that it should install a running copy of your custom view class into Interface builder so you can see it in the graphical display of your view hierarchy. ()Unfortunately, for this class, the @IBDesignable property seems to be flaky. It worked when I first added it, but then I deleted the plain text contents of my text view and the clickable links in my view went away and I have not been able to get them back.)

RTF_UITextView的代码非常简单。除了添加@IBDesignable属性和@IBInspectable属性的RTF_Filename属性外，我还添加了一个didSet()方法到RTF_Filename属性。当RTF_Filename属性的值发生变化时，didSet()方法将被调用。didSet()方法的代码非常简单:

@IBDesignable
class RTF_UITextView: UITextView
{
  @IBInspectable
  var RTF_Filename: String?
    {
    didSet(newValue)
    {
      //If the RTF_Filename is nil or the empty string, don't do anything
      if ((RTF_Filename ?? "").isEmpty)
      {
        return
      }
      //Use optional binding to try to get an URL to the
      //specified filename in the app bundle. If that succeeds, try to load
      //NSData from the file.
      if let fileURL = NSBundle.mainBundle().URLForResource(RTF_Filename, withExtension: "rtf"),
        
        //If the fileURL loads, also try to load NSData from the URL.
        let theData = NSData(contentsOfURL: fileURL)
      {
        var aString:NSAttributedString
        do
        {
          //Try to load an NSAttributedString from the data
          try
            aString = NSAttributedString(data: theData,
              options: [:],
              documentAttributes:  nil
          )
          //If it succeeds, install the attributed string into the field.
          self.attributedText = aString;
        }
        catch
        {
          print("Nerp.");
        }
      }
      
    }
  }
}

注意，如果@IBDesignable属性不能可靠地让你在Interface builder中预览样式文本，那么将上述代码设置为UITextView的扩展而不是自定义子类可能会更好。这样，您就可以在任何文本视图中使用它，而不必将文本视图更改为自定义类。

如果你需要支持iOS 7之前的iOS版本，请参阅我的其他答案。

你可以从gitHub下载一个包含这个新类的示例项目:

Github上的DatesInSwift演示项目

使用UITextView它支持可点击链接。 使用以下代码创建带属性的字符串

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:strSomeTextWithLinks];

然后设置UITextView text，如下所示

NSDictionary *linkAttributes = @{NSForegroundColorAttributeName: [UIColor redColor],

                                 NSUnderlineColorAttributeName: [UIColor blueColor],

                                 NSUnderlineStyleAttributeName: @(NSUnderlinePatternSolid)};

customTextView.linkTextAttributes = linkAttributes; // customizes the appearance of links
textView.attributedText = attributedString;

确保你在XIB中启用了UITextView的“可选”行为。

在Swift 5.5中

自从Swift 5.5以来，NSAttributedString是完全可本地化的，甚至不需要定义字符的数量就很容易使用。

func attributedStringBasics(important: Bool) {
    var buy = AttributedString("Buy a new iPhone!")
    buy.font = .body.bold()

    var website = AttributedString("Visit Apple")
    website.font = .body.italic()
    website.link = URL(string: "http://www.apple.com")

    var container = AttributeContainer()
    if important {
        container.foregroundColor = .red
        container.underlineColor = .primary
    } else {
        container.foregroundColor = .primary
    }

    buy.mergeAttributes(container)
    website.mergeAttributes(container)

    print(buy)
    print(website)
}