Memory leak

[UnsafePointer]

First, great UIImage extension category, I'm loving it so far. I'm having a hard time trying to clean this huge leak on PDFView drawRect.

I'm using UIImage+PDF to make a gallery thumbnail with the pdf first page with this code:

    UIButton *btnCatalogo;
    UILabel *lblTitulo;
    UILabel *lblUltimaFechaRevision;
    int x = 0;
    int y = 0;
    int index = 0;
    for (Catalogo *catalogo in _catalogosArray) {
        btnCatalogo = [UIButton buttonWithType:UIButtonTypeCustom];
        btnCatalogo.frame = CGRectMake(20 + (315 + 20) * x, 20 + (20 + 315 + 40 + 10) * y, 315, 315);
        btnCatalogo.tag = index;
        [btnCatalogo addTarget:self action:@selector(onClickCatalogoButton:) forControlEvents:UIControlEventTouchUpInside];
        [btnCatalogo setImage:[UIImage imageWithPDFNamed:catalogo.archivo fitSize:CGSizeMake(315, 315)] forState:UIControlStateNormal];
        [_scrollView addSubview:btnCatalogo];
        lblTitulo = [[UILabel alloc] initWithFrame:CGRectMake(20 + (315 + 20) * x, 20 + 315 + 10 + (20 + 315 + 40 + 10) * y, 315, 20)];
        lblTitulo.backgroundColor = [UIColor clearColor];
        lblTitulo.font = [UIFont boldSystemFontOfSize:16.0f];
        lblTitulo.textAlignment = NSTextAlignmentCenter;
        lblTitulo.textColor = [UIColor whiteColor];
        lblTitulo.text = catalogo.titulo;
        [_scrollView addSubview:lblTitulo];
        [lblTitulo release];
        lblUltimaFechaRevision = [[UILabel alloc] initWithFrame:CGRectMake(20 + (315 + 20) * x, 20 + 315 + 10 + 20 + (20 + 315 + 40 + 10) * y, 315, 20)];
        lblUltimaFechaRevision.backgroundColor = [UIColor clearColor];
        lblUltimaFechaRevision.font = [UIFont boldSystemFontOfSize:12.0f];
        lblUltimaFechaRevision.textAlignment = NSTextAlignmentCenter;
        lblUltimaFechaRevision.textColor = [UIColor lightGrayColor];
        if ([catalogo.fechaUltimaRevision isEqualToString:@""]) {
            lblUltimaFechaRevision.text = @"Nunca abierto";
        }
        else {
            lblUltimaFechaRevision.text = catalogo.fechaUltimaRevision;
        }
        [_scrollView addSubview:lblUltimaFechaRevision];
        [lblUltimaFechaRevision release];
        x++;
        if (x == 3) {
            x = 0;
            y++;
        }
        index++;
    }

And I'm getting the leaks on PDFView drawRect, any idea that might be happening?

Thanks in advance,

Renzo Crisóstomo.

[mindbrix]

Hi Renzo. Can you drill down in Instruments to find out exactly what object is leaking, and the line of code it is happening on?

I notice you have the call to imageWithPDFNamed: inside a loop. In my experience, loops and auto-released objects do not mix well. Have you tried draining the auto release pool? This link could help: http://stackoverflow.com/questions/65427/how-does-the-nsautoreleasepool-autorelease-pool-work

Best, Nigel.

[mindbrix]

Hi Renzo. Did you manage to find to the leak?

Best, Nigel.

[UnsafePointer]

Hi Nigel, I try draining the auto release pool manually without success. The leak is still there.

[mindbrix]

Hi Renzo. Is your project using ARC? UIImage+PDF has not been adapted for ARC yet.

Best, Nigel.

[UnsafePointer]

No, I'm using old school memory management. But I end in the conclusion that UIImage+PDF is no the reason. Inverted Call Tree + Show Obj-C Only on Leaks Instruments show that the leak occurs on [PDFView drawRect:] only when opening full colour pdf files, opening documents or so doesn't leak.

[mindbrix]

Can you send me a stripped-down project so that I can try to recreate the problem here?

[mindbrix]

Hi. I've now updated the project to use ARC. I hope this helps with your memory issues.