Objective-C: Class versus Protocol
72461
What is the point of Protocols?
14131
Objective-C : BOOL vs bool
110761
Class with single method -- best approach?
89547
How do third-party libraries work in Objective-C and Xcode?
119736
Swift native base class or NSObject
110531
Is there any reason to declare ivars if you're using properties exclusively in Objective-C?
146557
How do I declare class-level properties in Objective-C?
27528
Constants in Objective-C
78126
Override a method via ObjC Category and call the default implementation?
12297
When to and when not to use pointers in Objective-C
13936
What is the difference between class and instance attributes?
93254
Method overloading in Objective-C?
126314
Delegate Methods vs General Methods
22324
What's the difference between declaring a variable "id" and "NSObject *"?
77161
Why would you use a class method constructor versus alloc/init?
11736
When should I use a struct rather than a class in C#?
17633
class << self vs self.method with Ruby: what's better?