swift - NSView和NSScrollView中的NSTextView

我的目标是制作一个与Goole Docs文本编辑器类似的 View ，并在其中有注释的文本后面突出显示注释。


我的解决方案是让一个NSScrollView包含一个NSView(设置为文档 View )，它滚动并包含文本的NSTextView和其他将突出显示的NSView。

为此，NSTextView必须确定大小，就好像它直接属于NSScrollView一样。但是，我无法使NSTextView具有此行为。

我的布局代码是:

LatinViewController:loadView()

...
let latinView = LatinView()
latinView.autoresizingMask = [.ViewWidthSizable]
latinView.wantsLayer = true
latinView.layer?.backgroundColor = Theme.greenColor().CGColor
self.latinView = latinView
scrollView.documentView = latinView
...

LatinView:init()

...
let textView = LatinTextView()
textView.translatesAutoresizingMaskIntoConstraints = false
textView.string = "Long string..."
self.addSubview(textView)
self.textView = textView

self.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|[text]|", options: NSLayoutFormatOptions(), metrics: nil, views: ["text": textView]))
self.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|[text]|", options: NSLayoutFormatOptions(), metrics: nil, views: ["text": textView]))
...

LatinTextView:init()

...
self.minSize = NSMakeSize(0, 0)
self.maxSize = NSMakeSize(0, CGFloat(FLT_MAX))
self.verticallyResizable = true
self.horizontallyResizable = false
self.textContainer?.heightTracksTextView = false
...

能做到吗？

最佳答案

从您的需求看来，您可以简单地通过使用NSAttributedString和NSTextView来实现该功能。以下是示例代码
NSTextView已经具有丰富的文本编辑功能，并且可以通过NSAttributedString实现格式存储

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!
    @IBOutlet var textView:NSTextView!


    func applicationDidFinishLaunching(aNotification: NSNotification) {
        let singleAttribute1 = [ NSForegroundColorAttributeName: NSColor.purpleColor() , NSBackgroundColorAttributeName: NSColor.yellowColor() ]

        let multipleAttributes = [
            NSForegroundColorAttributeName: NSColor.redColor(),
            NSUnderlineStyleAttributeName: NSUnderlineStyle.StyleDouble.rawValue ]

        var string1 = NSAttributedString(string: "Hello World", attributes: singleAttribute1)

        var string2 = NSAttributedString(string: " This is knowstack", attributes: multipleAttributes)

        var finalString = NSMutableAttributedString(attributedString: string1)
        finalString.appendAttributedString(string2)

        self.textView.textStorage?.setAttributedString(finalString)

    }

    func applicationWillTerminate(aNotification: NSNotification) {
        // Insert code here to tear down your application
    }


    @IBAction func getAttributedString(sender:AnyObject){
        var attributedString = self.textView.attributedString()
        print(attributedString)
    }
}

关于swift - NSView和NSScrollView中的NSTextView，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/35299204/