Rather than rely on low level calls to objc_msgsend and it's variants, it uses actual Objective-C code modules I created that are wrapped using C-Style functions, which Nim can then use.

At the moment, the following GUI objects are available:


NSWindow	NSMenu	NSSavedialog	NSSlider
NSButton	NSTextfield	NSMessagebox	NSListbox	NSContainer (Groupbox)
NSLabel	NSCheckbox	NSOpendialog	NSTextedit	NSTableView
NSCombobox	NSDialog	NSLine	NSRadioButton

Preliminary documentation for GUI objects is available in the doc folder and in the wiki.

Here is an example of what coding with NimCocoa looks like:

import Cocoa / [NSWindow, NSTextfield, NSLabel, NSCheckbox, NSButton, NSLine, NSOpendialog, NSFunctions]
import json, os, plists, times

var mainWin: ID

var lblFile, txtFile, btnFile, lblAuthor, txtAuthor, lblApp, 
    txtApp, lblImage, txtImage, btnImage, line1, lblVersion, 
    txtVersion, lblIdent, txtIdent, line2, chkLaunch, btnExec: ID

const
  width:cint = 800
  height:cint = 310
  winStyle = NSWindowStyleMaskTitled or NSWindowStyleMaskClosable or NSWindowStyleMaskMiniaturizable


proc main() =

  Cocoa_Init()

  mainWin = newWindow("macOS Application Bundler", width, height, winStyle)

  lblFile = newLabel(mainWin, "Select Executable",30, 20, 120, 25)
  txtFile = newTextField(mainWin, "", 160, 20, 500, 25)
  btnFile = newButton(mainWin, "Load", 680, 20, 100, 25, getExecutable)
  txtFile.anchor=akWidth; btnFile.anchor=akRight

  lblAuthor = newLabel(mainWin, "Author Name", 30, 60, 120, 25)
  txtAuthor = newTextField(mainWin, "", 160, 60, 500, 25)
  txtAuthor.anchor=akWidth

  lblApp = newLabel(mainWin, "Application Name", 30, 100, 120, 25)
  txtApp = newTextField(mainWin, "", 160, 100, 170, 25)
  txtApp.anchor=akWidth

  lblImage = newLabel(mainWin, "Select Icon File", 30, 200, 120, 25)
  txtImage = newTextField(mainWin, "", 160, 200, 500, 25)
  btnImage = newButton(mainWin, "Load", 680, 200, 100, 25, getImage)
  txtImage.anchor=akWidth; btnImage.anchor=akRight

  line1 = newSeparator(mainWin, 30, 140, 750)

  lblVersion = newLabel(mainWin, "Application Version", 350, 100, 130, 25)
  txtVersion = newTextField(mainWin, "", 490, 100, 170, 25)
  txtVersion.anchor=akRight; lblVersion.anchor=akRight

  lblIdent = newLabel(mainWin, "Bundle Identifier", 30, 160, 120, 25)
  txtIdent = newTextField(mainWin, "", 160, 160, 500, 25)
  # btnCredits = newButton(mainWin, "Load", 680, 160, 100, 25, nil)
  txtIdent.anchor=akWidth

  line2 = newSeparator(mainWin, 20, 240, 750)

  chkLaunch = newCheckBox(mainWin, "Launch Application?", 320, 270, 150, 25)
  btnExec = newButton(mainWin, "Execute", 680, 270, 100, 25, createAppBundle)
  chkLaunch.anchor=akLeft + akRight + akBottom; btnExec.anchor=akRight + akBottom

  Cocoa_Run(mainWin)

if isMainModule:
  main()

Which results in the following:

Another screenshot:

Same app resized, showing how objects flow based on their associated 'anchor' setting:

I am working on documenting the available objects/functions as well as examples.

Stay Tuned!

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