Class hierarchy of NSObject

Question

I trying to understand class hierarchy. What are the sub classes of NSObject. Is there any graphical representation of the hierarchy?

The set of potential `NSObject` subclasses is not finite - you can add custom ones as much as you want. Are you asking for a diagram for the Cocoa Touch classes? — Georg Fritzsche, Jul 24 '10 at 00:08

score 2 · Answer 1 · answered Dec 04 '15 at 09:22

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You can explore the hierarchy in the hierarchical view of the Symbols navigator in a Xcode project. Be sure to de-select the document icon below to display all symbols and not just those defined in your project.

answered Dec 04 '15 at 09:22

atineoSE

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score 0 · Answer 2 · answered Sep 21 '15 at 09:50

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Here is a diagram explaining about NSObject class references but its not the one. There are so many things to know about NSObject. On the other hand its not finite, means you can add your custom classes also.

Hope this helped.

Thanks.

answered Sep 21 '15 at 09:50

onCompletion

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score 0 · Answer 3 · answered Jul 24 '10 at 02:53

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The class browser under Project>Class Browserwill display a hierarchal view of all the classes. There are a lot of them.

answered Jul 24 '10 at 02:53

TechZen

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Where do u find this Project>Class Browser ? Can u please show the exact path where we can check the hierarchy of the classes? – Pradeep Reddy Kypa Apr 20 '12 at 10:00

score 0 · Answer 4 · answered Apr 30 '20 at 13:49

You can use Xcode

Show the Navigator -> Show  the Symbol Navigator
//or 
Command + 3

Hierarchical -> Classes -> NSObject

You can use Filter field or Navigate -> Reveal in Symbol Navigator. Sometimes Filter field is buggy that is why you should repeat actions

Muhammad Faraz Ali · Answer 5 · 2023-02-11T18:51:29.873

NSObject is the root class of most Objective-C class hierarchies, from which subclasses inherit a basic interface to the runtime system and the ability to behave as Objective-C objects.

https://developer.apple.com/documentation/objectivec/nsobject

I found this this diagram on Google showing the inheritance relationships.

A comprehensive blog is written by Chris (Just read Chapter#12):

https://codewithchris.com/swift-tutorial-complete/#uikit Chapter 12

Class hierarchy of NSObject

5 Answers5