What Is Cocoa For Mac


I need to build an application on Mac OS X that runs on the background, windowless and provides a status icon in the top-right corner of the menu bar. It should launch on a specific action initiat. The best-selling introduction to Cocoa, once again updated to cover the latest Mac programming technologies, and still enthusiastically recommended by experienced Mac OS X developers. “Aaron’s book is the gold standard for Mac OS X programming books—beautifully written, and thoughtfully sculpted. Cocoa Programming for Mac OS X, 2/e teaches programmers and developers all the tools for Cocoa development. This book has a strong tutorial format and is completely updated for Mac OS X 10.2. The reader is guided through writing five applications and an InterfaceBuilder palette. Each project teaches several new ideas.

Cocoa Touch
Developer(s)Apple Inc.
Operating systemiOS
TypeSoftware framework

Cocoa Touch is the application development environment[1] for building software programs to run on iOS for the iPhone and iPod Touch, iPadOS for the iPad, watchOS for the Apple Watch, and tvOS for the fourth-generation Apple TV, from Apple Inc.

Cocoa Touch provides an abstraction layer of iOS, the operating system for the iPhone, iPod Touch, and iPad. Cocoa Touch is based on the macOSCocoa API toolset and, like it, is primarily written in the Objective-C language. Cocoa Touch allows the use of hardware and features that are not found in macOS computers and are thus unique to the iOS range of devices. Just like Cocoa, Cocoa Touch follows a Model-View-Controller (MVC) software architecture.

Cocoa Touch contains a different set of graphical control elements from Cocoa. Tools for developing applications based on Cocoa Touch are included in the iOS SDK.

Cocoa Touch in relation to other layers[edit]

iOS, watchOS, and tvOS technologies can be seen as a set of layers, with Cocoa Touch at the highest level and the Core OS/kernel at the bottom.

A hierarchical view of the iOS, watchOS, and tvOS technologies can be shown as follows:

  1. Cocoa Touch
  2. Media / Application Services
  3. Core Services
  4. Core OS / iOS kernel

Main features[edit]

Some of the main features and technologies of Cocoa Touch are:

  • App Extension
  • Data Management
  • Handoff
  • Document Picker
  • AirDrop
  • TextKit
  • UIKit Dynamics
  • Multitasking
  • Auto Layout
  • Storyboards
  • UI State Preservation
  • Apple Push Notification Service
  • Local Notifications
  • Gesture Recognisers
  • Standard System View Controllers

Main frameworks[edit]

Cocoa Touch provides the key frameworks for developing applications on devices running iOS. Some of these key frameworks are:

  • UIKit (based on Application Kit)
  • GameKit
  • iAd (discontinued in 2016)
  • MapKit
  • Address Book UI
  • EventKit UI
  • Message UI
  • Notification Center
  • PushKit
  • Twitter


Cocoa controls

Microsoft's WinObjC, the GNUstep-based iOS bridge for the Universal Windows Platform, contains a working implementation of Cocoa Touch frameworks like Foundation, UIKit, and MapKit released under the MIT License.[2] One of the UIKit implementations is based on XAML.[3]

Cocoa Mac Os

Various efforts have tried to bring UIKit, the modified AppKit from Cocoa Touch, to macOS:

  • Chameleon is a port of UIKit to macOS from 2014.[4]
  • ZeeZide's UXKit is a more recent port of UIKit to macOS. It exists a layer above AppKit and UIKit.[5]
  • Apple used a 'UXKit' private framework for a 2015 version of Photos.app.[6]
  • Apple made the bridge more official with the 'iosMac' or 'Marzipan' project in 2018, which put an 'iOSSupport' directory full of iOS frameworks in macOS mojave. They were originally restricted from developer use[7] and was finally made official with the release of 'Mac Catalyst' in 2019.[8]


  1. ^'Cocoa (Touch)'. developer.apple.com. Retrieved 2019-11-21.
  2. ^'microsoft/WinObjC/Frameworks: Objective-C for Windows'. GitHub. Retrieved 17 February 2020.
  3. ^'WinObjC: Migrating UIKit Controls to XAML'. GitHub.
  4. ^Heber, Sean. 'BigZaphod/Chameleon: Chameleon is a port of Apple's UIKit for iOS (and some minimal related frameworks) to Mac OS X.'GitHub.
  5. ^'ZeeZide/UXKit: Write code that works on both, UIKit and AppKit'. GitHub. ZeeZide. 19 December 2019. Retrieved 17 February 2020.
  6. ^Hall, Zac (5 February 2015). 'UIKit-like framework called UXKit used in Photos for Mac'. 9to5Mac.
  7. ^Demasi, Adam (7 June 2018). 'A quick look at UIKit on macOS'.
  8. ^'Mac Catalyst'. Apple Developer Documentation. Retrieved 17 February 2020.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Cocoa_Touch&oldid=984741402'

Very interesting post! I have some problems:

1) When i open the 'Serial monitoring' in Arduino IDE, the Cocoa application blocks as the port resource is busy

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2) When i click on one of the two buttons, tx/rx lights flicker on the Uno card and the LED_BUILTIN goes on for less than a second, then goes off but never stabilises

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3) In the Arduino IDE serial monitor, when i send 'i' or 'o', the LED_BUILTIN led switches on and off correctly

I'm running MAC OSX Sierra and get a warning saying that my target OS is lower than the deployment target (which i had to change in the project properties)

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Thank you for your help

What Is Cocoa For Mac