UIBezierPath : Incorrect retrieval of view screenshot - iphone

Question

I'm taking the screenshot following way.
- (UIImage*)screenshot
{
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
CGRect rect = [keyWindow bounds];
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[keyWindow.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
On UIView I'm drawing paths using UIBezierPath.
The screenshots that I'm getting are incorrect like this
Any ideas why the upper part is cut to blank ? On UIView all drawing is displayed correctly.
UPDATE : This happens when I draw a long path with UIBezierPath when I release the my brush and get the screenshot it gets the screenshot correctly.

Answer 1

I saw the another thread which you post.
According to the apple technical Q&A, you need to adjust the geometry coordinate first.
So, before render the layer of window, do following things first.
// -renderInContext: renders in the coordinate space of the layer,
// so we must first apply the layer's geometry to the graphics context
CGContextSaveGState(context);
// Center the context around the window's anchor point
CGContextTranslateCTM(context, [window center].x, [window center].y);
// Apply the window's transform about the anchor point
CGContextConcatCTM(context, [window transform]);
// Offset by the portion of the bounds left of and above the anchor point
CGContextTranslateCTM(context,
-[window bounds].size.width * [[window layer] anchorPoint].x,
-[window bounds].size.height * [[window layer] anchorPoint].y);

Answer 2

- (UIImage*)screenshot :(UIView*)vw
{
CGRect rect = [vw bounds];
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[vw.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
Use This one

Answer 3

-(IBAction)takeScreenShot:(id)sender
{
UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
}