How can I use a Category to add properties to NSObject, and all subclasses of NSObject
4399
Objective-C: Property / instance variable in category
11153
Expose a private Objective-C method or property to subclasses
87012
Objective-C declared @property attributes (nonatomic, copy, strong, weak)
72595
Cannot add items to an NSMutableArray ivar
22324
What's the difference between declaring a variable "id" and "NSObject *"?
75090
Can modules have properties the same way that objects can?
154684
How can I make a deep copy in Objective-C?
133582
Can category methods be overridden? IOS
122578
__NSArrayM insertObject:atIndex:]; object cannot be nil
37213
Shortcuts in Objective-C to concatenate NSStrings
96794
Whats the Blender 2.8 command for adding an object to a collection using python?
113456
Objective-C class extension
40351
Obtain details of categories on a class at runtime?
124790
Is there anything like a generic list in Cocoa / Objective-C?
123381
How do I use IValidatableObject?
111831
Storing custom objects in an NSMutableArray in NSUserDefaults
8463
How do I sort an NSMutableArray with custom objects in it?