Memory management when returning an Objective-C object

Question

In Objective-C, if I have a method in which I select and initialize an object and then return it, where / how to free it?

for example, let's say I have a method in which I create an object:

- (void)aMethod {
    UIView *aView = [self createObject];
}

- (UIView *)createObject {
    UIView *returnView = [[UIView alloc] initWithFrame:CGRectZero];
    return returnView;
}

When can I let this object go? Or am I just auto-advertising?

Answer 1

- (void)aMethod {
    UIView *aView = [self createObject];
}

- (UIView *)createObject {
    UIView *returnView = [[UIView alloc] initWithFrame:CGRectZero];
    [returnView autorelease];
    return returnView;
}

Answer 2

The rules for managing memory are clear on this. You must read them. Very simple and fundamental to write Objective-C code using Apple frameworks.

Answer 3

Remember also that the Garbage Collection is not present on the iPhone, so you cannot authorize if you are developing for this environment.

As for when you should free an object, the simple answer is when you finish using it and before you destroy your application.