如何以编程方式创建多个 NSTextField？

Question

我有一组 CGPoints。我需要为数组中的每四个点添加一个个人标签，因此我需要以编程方式创建多个 NSTextFields。我可以通过单击鼠标来添加点，并且可以根据需要创建任意数量的点。这些点的标签必须全部处于活动状态才能同时为用户显示文本。我该怎么做？

(macOS, Xcode 7, Swift 2)

这是我的代码：

import Cocoa
@NSApplicationMain

class AppDelegate: NSObject, NSApplicationDelegate {
    @IBOutlet weak var window: NSWindow!
    @IBOutlet weak var drawView: DrawView!
    @IBOutlet weak var view: NSView!
    let label = NSTextField(frame: NSMakeRect(0,0,100,50))
    var pointsArray: [CGPoint] = []

    func applicationWillUpdate(aNotification: NSNotification) {
        label.backgroundColor = NSColor.clearColor()
        label.bezeled = false
        label.stringValue = "\(pointsArray.count/4)"


        var multiple = (1...25).map { _ in label }


        for index in 0..<(pointsArray.count/4) {

            let point = CGPoint(x: pointsArray[index*4].x, y: pointsArray[index*4].y)
            label.frame = CGRect(origin: point, size: CGSize(width: label.bounds.width, height: label.bounds.height))

            let sticker = multiple[index]
            view.addSubview(sticker)
        }
    }
}

在运行时我只看到一个标签，但我需要同时看到几个标签（在每四个 CGPoint 上）。如果我有 100 个 CGPoints 我必须有 25 个标签。

Answer 1

I see only one label

既然我已经理顺了您的花括号和缩进，就很容易理解原因了。您的循环构造不正确，因此您创建了一个标签并四次更改其框架。您需要使用四个单独的框架创建四个单独的标签。

Answer 2

创建多个 NSTextField 的代码：

import Cocoa
@NSApplicationMain

class AppDelegate: NSObject, NSApplicationDelegate {
    @IBOutlet weak var window: NSWindow!
    @IBOutlet weak var drawView: DrawView!
    var view = NSView(frame: NSMakeRect(0,0,1920,1080))
    var pointsArray: [CGPoint] = []

    var label1 = NSTextField(frame: NSMakeRect(0,0,100,50))
    var label2 = NSTextField(frame: NSMakeRect(0,0,100,50))
    var label3 = NSTextField(frame: NSMakeRect(0,0,100,50))
    .............
    .............
    var label25 = NSTextField(frame: NSMakeRect(0,0,100,50))

    func applicationWillUpdate(aNotification: NSNotification) {

        var labelArray = [label1, label2, label3, ..... label25]

        for i in 0..<(pointsArray.count/4) {

            labelArray[i].backgroundColor = NSColor.clearColor()
            labelArray[i].bezeled = false
            labelArray[i].stringValue = "\(i+1)"

            let point = CGPoint(x:(pointsArray[i * 4].x), y:(pointsArray[i * 4].y))

            var originPoint: [CGPoint] = []
            originPoint.append(point)

            labelArray[i].frame = CGRect(origin: originPoint[0], 
                size: CGSize(width: labelArray[i].bounds.width, height: labelArray[i].bounds.height))

            view.addSubview(labelArray[i])
        }
    }

如何以编程方式创建多个 NSTextField？

How to programmatically create several NSTextFields?

nsview

nstextfield

addsubview

cgpoint

swift2