swift - 如何在 swift shell 应用程序中制作可编辑的文本字段

Question

我正在尝试在 NSWindow 中创建一个可编辑的文本区域。到目前为止我可以一个窗口并添加一个文本字段 - 但是当我选择它并键入字符时，字符会在 shell 中而不是文本区域中回显。

注意:这不是一个 Xcode 项目 - 我试图在一个单一的shell 中的文件 - 我的目标是仅在代码中执行此操作

要复制错误，请将以下代码放入文件 (experiment.swift) 并提供 shell 命令

> swift experiment.swift

这是代码

---

import Cocoa

class MyAppDelegate: NSObject, NSApplicationDelegate {

  let window = NSWindow()
  let ed = NSTextField(frame: NSMakeRect(20, 10, 180, 160))

  func applicationDidFinishLaunching(aNotification: NSNotification) {

    window.setContentSize(NSSize(width:600, height:200))
    window.styleMask = NSTitledWindowMask | NSClosableWindowMask |
                       NSMiniaturizableWindowMask |
                       NSResizableWindowMask

    window.opaque = false
    window.center();
    window.title = "My window"

    ed.font = NSFont(name:"Helvetica Bold", size:20)
    ed.stringValue = "edit me"
    ed.editable = true
    ed.selectable = true

    window.contentView!.addSubview(ed)

    window.makeKeyAndOrderFront(window)
    window.level = 1
}

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

}

let app = NSApplication.sharedApplication() 
let obj = MyAppDelegate()

app.delegate = obj
app.run()

Answer 1

在app.run()之前，添加

app.setActivationPolicy(.Regular)

根据 the docs ，默认的激活策略是 Prohibited:

• Prohibited

The application does not appear in the Dock and may not create windows or be activated. [...] This is also the default for unbundled executables that do not have Info.plists.