title: Taking screenshot and setting it again as UIImageView make it smaller size?
body: <p>I am working on a project where I need to take the screenshot at particular time interval programmatically of a UIImageView and set that image back to that UIImageView. But when I do this, the UIImageview comes with smaller size image then the previous one. Below is the code how I am taking the screenshot.</p>
  
  <pre><code>- (UIImage*)screenshot 
  {
      // Create a graphics context with the target size
      // On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration
      // On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
      CGSize imageSize = [[UIScreen mainScreen] bounds].size;
      if (NULL != UIGraphicsBeginImageContextWithOptions)
          UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
      else
          UIGraphicsBeginImageContext(imageSize);
  
      CGContextRef context = UIGraphicsGetCurrentContext();
  
      // Iterate over every window from back to front
      for (UIWindow *window in [[UIApplication sharedApplication] windows]) 
      {
          if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen])
          {
              // -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);
  
              // Render the layer hierarchy to the current context
              [[window layer] renderInContext:context];
  
              // Restore the context
              CGContextRestoreGState(context);
          }
      }
  
      // Retrieve the screenshot image
      UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
  
      UIGraphicsEndImageContext();
  
      return image;
  }
  </code></pre>
  
  <p>and I set it as </p>
  
  <pre><code>theImageView.image=[self screenshot];
  </code></pre>
  
  <p>Why the image comes with smaller size everytime? And it gets smaller and smaller and smaller.</p>
  
  <p>Please share the solution. Thanks in advance</p>