Objective C @autoreleasepool infinite loop taking screenshots

Question

I have a memory issue with small app taking infinite amount of screenshots every X milliseconds and displaying them in a imageview. Even with autorelease, it floods the memory very quickly. Here's the code:

- (void)draw {
    do {
        @autoreleasepool {
            CGImageRef image1 = CGDisplayCreateImage(kCGDirectMainDisplay);

            NSBitmapImageRep *bitmapRep = [[NSBitmapImageRep alloc] initWithCGImage:image1];
            NSImage *image = [[NSImage alloc] init];
            [image addRepresentation:bitmapRep];
            _imageView.image = image;
            [NSThread sleepForTimeInterval:1];
        }
    }while(true);
}

Any ideas?

Answer 1

you need to release the image using CGImageRelease

- (void)draw {
    do {
        @autoreleasepool {
            CGImageRef image1 = CGDisplayCreateImage(kCGDirectMainDisplay);

            NSBitmapImageRep *bitmapRep = [[NSBitmapImageRep alloc] initWithCGImage:image1];
            NSImage *image = [[NSImage alloc] init];
            [image addRepresentation:bitmapRep];
            _imageView.image = image;
            CGImageRelease(image1);   // release the image
            [NSThread sleepForTimeInterval:1];
        }
    }
    while(true);
}