Question

I would like to know how can I merge 2 uiimage into 1? I would like to save the end product to the library. For saving images I’m using a UI button. Here’s snippet of how I save a UIImageview.image.

-(IBAction)getPhoto:(id)sender  {

UIImage* imageToSave = imageOverlay.image;

UIImageWriteToSavedPhotosAlbum(imageToSave, nil, nil, nil);
}

I’ve looked online and read about UIGraphicsBeginImageContext. Found an example but I couldn’t understand how to actually apply it to mine. Here’s the one I’ve got so far.

- (UIImage*)addImage:(UIImage *)image secondImage:(UIImage *)image2 
{
UIGraphicsBeginImageContext(image.size);
[image drawInRect:CGRectMake(0,0,image.size.width,image.size.height)];
[image2 drawInRect:CGRectMake(10,10,image2.size.width,image2.size.height) blendMode:kCGBlendModeNormal alpha:1.0];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

return newImage;
}

Right now I have 2 UIImageviews which is imageOverlay.image and imageView.image. If I use the method above how to assign the return value to UIImageWriteToSavedPhotoAlbum? Hope someone can point me to the right direction.

Thanks very much.

Answer 1

Seems like you don’t have the header for the method in your header file, in the .h file of the class/view controller from which you’re running the IBAction, add the first line of your method, -(UIImage*) addImage:… And end it with a ; before the @end. That should work, though you’d have to implement it in the .m file of the same .h file somewhere.