Screenshot CGRectMake

jcc · 08-09-2010, 03:28 PM

I am capturing a screenshot of the screen using:

Code:

CGRect contextRect  = CGRectMake(-100, -100, 1024, 768);
	
	UIGraphicsBeginImageContext(contextRect.size);
	
	[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
	
	UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
	
	UIGraphicsEndImageContext();

The screen is being captured at the correct size, but the placement is off. Instead of starting at origin (-100,-100) it is starting at (0,0).

Any ideas?

JDave · 08-09-2010, 05:11 PM

Does

Code:

UIGraphicsBeginImageContext(contextRect.frame);

work?

edit: I realize my above suggestion does not work. Looking deeper into your problem, I believe the only way to capture information that is off screen is via a transform that will scale the desired image data into the visible screen dimensions.

This is old, but it may point you in the right direction:
http://forums.macrumors.com/showthread.php?t=630321