Question

Could someone give me some advice why I have a memory leak associated to this line:

Answer 1

If you look at the warning from Build and Analyze, you’ll notice that the warning actually applies to line 38 of your code, not line 39, on which the message is being shown.

On line 38 you call alloc, that is, you allocate memory for a UIImageView.

Every alloc, new, copy, and retain requires a matching release or autorelease. So, the compiler is warning you that you have called alloc but haven’t called a corresponding release anywhere.

You can add an autorelease to line 38 like so:

self.tableView.backgroundView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Back_01.jpg"]] autorelease];

If you don’t want to use autorelease then you can use something like this:

UImageView *bgImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Back_01.jpg"]];
self.tableView.backgroundView = bgImage;
[bgImage release];

The only real difference is that autorelease waits until the end of the run loop when the autorelease pool drains, whereas calling release will potentially release the memory sooner.