iphone sdk: Creating an image of the contents of the screen?

I'开发者_Python百科m looking for a way to write the contents of the screen to an image. Any idea how to achieve that? Does it involve using Quartz?

Thanks

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Add this code to your UIViewController to create a screen dump of its UIView.

// create screen dump of the view of this view controller
UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenShot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

// save image to photos
UIImageWriteToSavedPhotosAlbum(screenShot, self, nil, nil);

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In a nutshell:

CGImageRef screen = UIGetScreenImage();
UIImage *screenImage = [UIImage imageWithCGImage:screen];