Question

I have an application where a user is able to annotate a signature image on top of a fax image (tif) before sending out the fax. I have seen a very good question mentioned here: iPhone SDK – How to draw a UIImage onto another UIImage? however I still am unable to do what I am looking for. Can someone walk me through as I am new to graphical contexts ETC.

Answer 1

This is what you need to do to get the image,

CGRect faxImageRect = CGRectZero;
CGRect signatureRect = CGRectZero;

faxImageRect.size = faxImage.size;
signatureRect.size = signature.size;

// Adjust the signature's location within the fax image
signatureRect.origin = desirableLocation;

UIGraphicsBeginImageContext(faxImage.size);
[faxImage drawInRect:faxImageRect];
[signature drawInRect:signatureRect];
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

By the end image will contain the image you want to send.

This sample uses the true sizes of their images. You can alter that although they could be subject to stretching.