Question

I have this in my code :

NSString *myString = @"";
....

if (...) {
myString = @" other string";
}
...
myString = @" an other string ";

is this a leak, please ?

Answer 1

Sorry, guys, but it’s not autoreleased. It’s not leaked, but it’s not autoreleased. This code prove it:

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSString *str1 = @"First one"; // 
NSString *str2 = [NSString stringWithFormat:@"The %dnd", 2]; // this autoreleasing string
[pool drain];

NSLog(@"%@", str1); // All's ok
NSLog(@"%@", str2); // EXC_BAD_ACCESS

Read about strings created with @"..." construction at Strings PRogramming Guide:

The compiler makes such object
constants unique on a per-module
basis, and they’re never deallocated,
though you can retain and release them
as you do any other object.