[iphone] 전체 화면 캡쳐 하는 방법

- (UIImage *)captureScreenInRect {

UIGraphicsBeginImageContextWithOptions(layView.bounds.size, layView.opaque, 0.0);

[layView.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage * img = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return img;

}