Adjusting size of in app screenshot

Question

I am having problem in taking a screenshot with specific area. I have a tabbar at the bottom and a toolbar at the top. I would like to take a screenshot of the screen between those two bars. Below is my code. How can i improve my code to crop out the bars?

Thanks

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(); UIImageWriteToSavedPhotosAlbum(image, self, @selector(imageSavedToPhotosAlbum: didFinishSavingWithError: contextInfo:), nil);

check this post..stackoverflow.com/questions/9694806/…

Pavan Kumar
– Pavan Kumar

2012-03-16 06:45:43 +00:00
Commented Mar 16, 2012 at 6:45 — Pavan Kumar
– Pavan Kumar, Commented Mar 16, 2012 at 6:45

Madhu · Accepted Answer · 2012-03-16 08:24:53Z

3

I suppose you could try cropping out the part you need after creating the final UIImage.

CGRect contentRectToCrop = CGRectMake(0, 44, 320, 392); UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], contentRectToCrop); UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];

answered Mar 16, 2012 at 8:24

Madhu

2,38417 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Clarence Over a year ago

Thanks, sounds good, but where can i place this code? I tried to put in before the saving method, but seems does not work.

Madhu Over a year ago

Try replacing the single line UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); in your code with this block and be sure to pass 'croppedImage' instead of 'image' to the UIImageWriteToSavedPhotosAlbum method.

Abhishek Over a year ago

For retina image cropping, you need to add scaling factor to contentRectToCrop

fbernardo · Accepted Answer · 2012-03-16 07:51:35Z

Untested sugestion:

imageSize.origin.y+=44; //toolbar size imageSize.size.height-=88; //tabbar+toolbar size

Collectives™ on Stack Overflow

Adjusting size of in app screenshot

2 Answers 2

3 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Linked

Related