Automate Screenshots on iPhone Simulator?

Question

I\'m tired of taking new screenshots everytime I change my UI for my iPhone application. I would like to be able to run a script/program/whatever to load my binary on the si

Answer 1

The private UIGetScreenImage(void) API can be used to capture the contents of the screen:

CGImageRef UIGetScreenImage();
void SaveScreenImage(NSString *path)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    CGImageRef cgImage = UIGetScreenImage();
    void *imageBytes = NULL;
    if (cgImage == NULL) {
        CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB();
        imageBytes = malloc(320 * 480 * 4);
        CGContextRef context = CGBitmapContextCreate(imageBytes, 320, 480, 8, 320 * 4, colorspace, kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Big);
        CGColorSpaceRelease(colorspace);
        for (UIWindow *window in [[UIApplication sharedApplication] windows]) {
            CGRect bounds = [window bounds];
            CALayer *layer = [window layer];
            CGContextSaveGState(context);
            if ([layer contentsAreFlipped]) {
                CGContextTranslateCTM(context, 0.0f, bounds.size.height);
                CGContextScaleCTM(context, 1.0f, -1.0f);
            }
            [layer renderInContext:(CGContextRef)context];
            CGContextRestoreGState(context);
        }
        cgImage = CGBitmapContextCreateImage(context);
        CGContextRelease(context);
    }
    NSData *pngData = UIImagePNGRepresentation([UIImage imageWithCGImage:cgImage]);
    CGImageRelease(cgImage);
    if (imageBytes)
        free(imageBytes);
    [pngData writeToFile:path atomically:YES];
    [pool release];
}

Be sure to wrap it inside an #ifdef so it doesn't appear in the release build.