Cocoa 和 Swift 中的简单可点击链接

Question

我正在为 mac 10.11 快速编写一个桌面应用程序，我想添加一个指向 about 页面的链接。

很像这样：https://developer.apple.com/library/mac/qa/qa1487/_index.html

我找不到好的教程或参考资料。

任何帮助将不胜感激

Answer 1

Swift 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.linkColor,
            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 2

修改了现有答案以允许标签文本的子字符串变为下划线和蓝色，因此您可以执行以下操作：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 3

最简单的方法是继承NSTextField 以创建HyperlinkTextField。下面是一个例子：

首先，让我们在您的项目中添加一个HyperlinkTextField 类：

// 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)!)
    }
}

接下来，在 Interface Builder 中，将标签从对象库拖到您的窗口中。

选择该标签，进入菜单View > Utilities > Show Identity Inspector（或按Cmd + Opt + 3）并将类更改为HyperlinkTextField

转到 Attributes Inspector (Cmd + Opt + 4) 并将 Href 设置为您要访问的 URL。

标签在 Interface Builder 中显示黑色文本，但当您运行应用程序时一切都会好起来的。点击标签将在您的默认浏览器中打开链接。

我无法实现的一件事是让 HyperlinkTextField 在 Interface Builder 中显示为蓝色并带有下划线。欢迎就如何做到这一点发表评论。

Answer 4

正是我需要的。这是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 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)

Answer 6

斯威夫特 4.2

class HyperlinkTextField: NSTextField {


private var detector: NSDataDetector!

override func awakeFromNib() {
    super.awakeFromNib()
     detector = try! NSDataDetector(types: NSTextCheckingResult.CheckingType.link.rawValue)
}


func setText(text: String ){
    let matches = detector.matches(in: text, options: [], range: NSRange(location: 0, length: text.utf16.count))

    for match in matches {
        guard let range = Range(match.range, in: text) else { continue }
        let url = text[range]
        let attributedString = NSMutableAttributedString(string: text)
        attributedString.addAttribute(.link, value: url, range: match.range)
        self.attributedStringValue = attributedString
    }
}

}