ObjC runtime tips 01

Some hidden details in Language.

Runtime , Self and Super with Init

   @implementation Son : Father
   - (id)init
   {
       self = [super init];
       if (self) {
           NSLog(@"%@", NSStringFromClass([self class]));
           NSLog(@"%@", NSStringFromClass([super class]));
       }
       return self;
   }
   @end

output:

NSStringFromClass([self class]) = Son
NSStringFromClass([super class]) = Son

Memory Management

What and where are the stack and heap?

• What are the stack and heap?
• Where are they located physically in a computer’s memory?
• To what extent are they controlled by the OS or language run-time?
• What is their scope?
• What determines their sizes?
• What makes one faster?