IPhone online course, lesson 2
Sep 17
2009
2009
lesson 2 is mostly about Objective C , object oriented programing , language syntax , and memory management.
this episode has 8 min intro
then minute 10 to 17-43 is basic oop and cocoa
where they talk about the cocoa framework , in summary Objective C is loos type language with dynamic type id.
afterwared they talked about 2.0 Syntax addition (dot notation synthesis etc’) and naming conventions
43-47 dynamic typing
47-49 nil (null object)
49-50 bool (yes/no instead of true)
50-52 selector - this one is interesting – it’s a way to hold the name or promise of a function as an object , you can check if it exists on an instance invoke in etc’ .
52-53 introspection – objective c name for reflection
53-57 working with oject
57-end overview of the cocoa framework data types.
I’m attaching my assignments as reference.
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