Why is there no autorelease pool when I do performSelectorInBackground:?

Question

I am calling a method that goes in a background thread:

[self performSelectorInBackground:@selector(loadViewControllerWithIndex:) withObject:[NSNumber number         


        

Answer 1

I agree that most likely the reason for this is because the leaked object (an NSNumber), is a parameter passed in from outside the thread. Hence, this variable belongs to the calling thread (and its autorelease pool)

The calling thread should use NSAutoreleasePool and I suggest that you add a retain instruction to your parameter as:

- (void) loadViewControllerWithIndex:(NSNumber *)indexNumberObj {
    NSAutoreleasePool *arPool = [[NSAutoreleasePool alloc] init];
    [indexNumberObj retain];

    ....

    [arPool release];
  }