Objective-C pointers?

Question

I am new to coding and trying to get up to speed with Objective-C. Came across some code I did not understand. I was hoping someone could clarify it for me. In the case belo

Answer 1

From your simple example it is really hard to say what is going on. Typically [class add:] type methods return void, so they should raise a compiler warning that 'void value is not ignored as it should be.'

So without more info, it is a bit hard to figure things out.

A few things to keep in mind:

• you can send commands to 'nil' in objc. So, if [foo add:pointer] returns nil, then you can call 'release' on it all day with no affect.

• retainCount is your friend. You can call it on any NSObject to see how many objects are holding onto it. This may also help you track down the issue.

• Finally, is Garbage Collection on?