Foundation Classes

[Keoeul]

I am working my way through chapter 15 and have a question.

Foundation classes, like NSNumber, are added to the autorelease pool, so its not necessary to manually release them unless you create one.

That being said, classes like NSNumber in the book examples don't have the standard alloc/init methods.

I assume that because they are foundation classes, they don't require alloc/init?

Thanks for the help in advance

[TotalLuck]

hi

you can use alloc/init methods with the NSNumber class. you have to remember to release them though. 

it is easier for me though to use the autorelease pool and let the program manage it for me.

so you can can do this:

Code: (Objective-C)

NSNumber *myNumber = [[NSNumber alloc] initWithInt: 69];
//use myNumber  in some way here

[myNumber release]; // make sure you release it when done

but when you do this, you don't have to release it, it will be autoreleased for you.

Code: (Objective-C)

NSNumber *myNumber = [NSNumber numberWithInt: 69]; // this is a creation and initialization class method for NSNumber class which ads it to the autorelease pool. 

// use myNumber in some way here

// forget about it! its auto released

make sure you reread chapter 15,  the first few pages  talk about this.   but if you have any more questions feel free to post .

Greg