Cocoa和Swift中的簡單可點擊鏈接

Question

我在swift for mac 10.11中編寫桌面應用程序，我想添加一個鏈接到about頁面。

非常喜歡這樣的：https://developer.apple.com/library/mac/qa/qa1487/_index.html

我一直沒能找到一個很好的教程或參考。

任何幫助，將不勝感激

Answer 1

最簡單的方法是繼承NSTextField創建HyperlinkTextField。下面是一個例子：

首先，讓我們一HyperlinkTextField類添加到您的項目：

// HyperlinkTextField.swift 

import Cocoa 

@IBDesignable 
class HyperlinkTextField: NSTextField { 
    @IBInspectable var href: String = "" 

    override func awakeFromNib() { 
     super.awakeFromNib() 

     let attributes: [String: AnyObject] = [ 
      NSForegroundColorAttributeName: NSColor.blueColor(), 
      NSUnderlineStyleAttributeName: NSUnderlineStyle.StyleSingle.rawValue 
     ] 
     self.attributedStringValue = NSAttributedString(string: self.stringValue, attributes: attributes) 
    } 

    override func mouseDown(theEvent: NSEvent) { 
     NSWorkspace.sharedWorkspace().openURL(NSURL(string: self.href)!) 
    } 
} 

接下來，在Interface Builder中，拖動從對象庫的標籤到你的窗口。

選擇標籤，進入菜單視圖>工具>顯示身份檢查（或按Cmd + Opt + 3）和類更改爲HyperlinkTextField

轉到屬性檢查器（Cmd + Opt + 4 ）並將Href設置爲您要訪問的URL。

標籤顯示在界面生成黑色文本，但是當你運行你的應用程序就萬事大吉了。點擊標籤將打開默認瀏覽器中的鏈接。

我無法實現的一件事是使HyperlinkTextField在Interface Builder中顯示爲藍色並加下劃線。如何做到這一點的意見是值得歡迎的。

Answer 2

正是我需要的。這裏是Swift3版本：

import Cocoa 

@IBDesignable 
class HyperTextField: NSTextField { 
    @IBInspectable var href: String = "" 

    override func awakeFromNib() { 
     super.awakeFromNib() 

     let attributes: [String: AnyObject] = [ 
      NSForegroundColorAttributeName: NSColor.blue, 
      NSUnderlineStyleAttributeName: NSUnderlineStyle.styleSingle.rawValue as AnyObject 
     ] 
     self.attributedStringValue = NSAttributedString(string: self.stringValue, attributes: attributes) 
    } 

    override func mouseDown(with event: NSEvent) { 
     NSWorkspace.shared().open(URL(string: self.href)!) 
    } 
} 

Answer 3

修改現有的答案，允許標籤的文本的一個子成爲下劃線和藍色的，所以你可以這樣做：This是答案

// A text field that can contain a hyperlink within a range of characters in the text. 
@IBDesignable 
public class SubstringLinkedTextField: NSTextField { 
    // the URL that will be opened when the link is clicked. 
    public var link: String = "" 
    @available(*, unavailable, message: "This property is reserved for Interface Builder. Use 'link' instead.") 
    @IBInspectable public var HREF: String { 
     get { 
      return self.link 
     } 
     set { 
      self.link = newValue 
      self.needsDisplay = true 
     } 
    } 

    // the substring within the field's text that will become an underlined link. if empty or no match found, the entire text will become the link. 
    public var linkText: String = "" 
    @available(*, unavailable, message: "This property is reserved for Interface Builder. Use 'linkText' instead.") 
    @IBInspectable public var LinkText: String { 
     get { 
      return self.linkText 
     } 
     set { 
      self.linkText = newValue 
      self.needsDisplay = true 
     } 
    } 

    override public func awakeFromNib() { 
     super.awakeFromNib() 

     self.allowsEditingTextAttributes = true 
     self.isSelectable = true 

     let url = URL(string: self.link) 
     let attributes: [NSAttributedStringKey: AnyObject] = [ 
      NSAttributedStringKey(rawValue: NSAttributedStringKey.link.rawValue): url as AnyObject 
     ] 
     let attributedStr = NSMutableAttributedString(string: self.stringValue) 

     if self.linkText.count > 0 { 
      if let range = self.stringValue.indexOf(substring: self.linkText) { 
       attributedStr.setAttributes(attributes, range: range) 
      } else { 
       attributedStr.setAttributes(attributes, range: NSMakeRange(0, self.stringValue.count)) 
      } 
     } else { 
      attributedStr.setAttributes(attributes, range: NSMakeRange(0, self.stringValue.count)) 
     } 
     self.attributedStringValue = attributedStr 
    } 
} 

Answer 4

迅速4，XCODE 9

@IBDesignable 
class HyperlinkTextField: NSTextField { 

@IBInspectable var href: String = "" 

override func resetCursorRects() { 
    discardCursorRects() 
    addCursorRect(self.bounds, cursor: NSCursor.pointingHand) 
} 

override func awakeFromNib() { 
    super.awakeFromNib() 

    // TODO: Fix this and get the hover click to work. 

    let attributes: [NSAttributedStringKey: Any] = [ 
     NSAttributedStringKey.foregroundColor: NSColor.blue, 
     NSAttributedStringKey.underlineStyle: NSUnderlineStyle.styleSingle.rawValue as AnyObject 
    ] 
    attributedStringValue = NSAttributedString(string: self.stringValue, attributes: attributes) 
} 

override func mouseDown(with theEvent: NSEvent) { 
    if let localHref = URL(string: href) { 
     NSWorkspace.shared.open(localHref) 
    } 
} 

}

Answer 5

let link = NSTextField() 
link.isBezeled = false 
link.drawsBackground = false 
link.isEditable = false 
link.isSelectable = true 
link.allowsEditingTextAttributes = true 
let url = URL(string: "http://www.google.com") 
let linkTextAttributes: [NSAttributedStringKey: Any] = [ 
     NSAttributedStringKey.underlineStyle: NSUnderlineStyle.styleSingle.rawValue, 
     NSAttributedStringKey.foregroundColor: NSColor.blue, 
     NSAttributedStringKey.link: url as Any 
      ] 
let string = "whatever" 
link.attributedStringValue = NSAttributedString(string: string, attributes: linkTextAttributes) 
window.contentView?.addSubview(link)