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iosmemory-managementretain

A little bit wondering of memory management on ios

I have many viewControllers.

and all of them have many retained properties.

so, I would add these code to every viewControllers:

- (void)viewDidUnload {
    self.every_retained_property = nil;
    [super viewDidUnload];
}
- (void)dealloc {
    [every_retained_property release];
    [super dealloc];
}

Till now things all go well in my app.

But I heard that,

a_retained_property = newValue;
// equals to
[a_retained_property release];
a_retained_property = [newValue retain];

so if I've already set a_retained_property to nil in viewDidUnload,

it is neccessary to release a_retained_property in dealloc, like what I am doing?

I just wonder it.

Thanks!

Solution

  • It will not do you any harm, put it that way. But

    a_retained_property = newValue;

    is not equivalent to:

    [a_retained_property release];
a_retained_property = [newValue retain];

    Instead you should use:

    self.a_retained_property = newValue;