macOS Problems understanding ARC and zombies

ramy1989 said:

I started learning Cocoa when there still was the manual counting, but after few time I got the new OS update and ARC was available.
I know how to user retain-release if I don't use ARC, but the problem comes with ARC enabled.I always used strong references and everything was fine, never had leaks nor dangling pointers.
But I want to understand better how it works.

Now I am running a project for debugging, with zombies enabled.I tried do do this:

Code:

    __unsafe_unretained NSString* str;
    @autoreleasepool
    {
        str= @"Hello";
    }
    NSLog(@"%@",str);

I would except that str is zombie because @"Hello" should be autoreleased, and I print it outside the pool.But instead it just prints "Hello" and all goes fine.Why?

Also a tip, should I start making some projects with manual counting to understand how ARC works?

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Madd the Sane said:

To get what you're looking for, use

Code:

str = [NSString stringWithString:@"Hello"]

.

I think NSString has a stringWithString method, but I can't verify it right now.

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