Question

I’ve noticed that line drawings from the drawing app I’m making are very low quality when saved using this code:

UIImage *imageToSave = drawImage.image;
UIImageWriteToSavedPhotosAlbum(imageToSave, nil, nil, nil);

As far as I can understand, you can’t set the JPG quality when using UIImageWriteToSavedPhotosAlbum.

Is there a way to save the UIImage as a PNG to the photo library directly, or some way to increase the JPG quality? When doing a screenshot (pressing on/off+home on the iPad) the quality of the grabbed picture is perfect, but I can’t expect people to save images that way.

Any help greatly appreciated!

Answer 1

Try this

NSData* pngdata = UIImagePNGRepresentation (drawImage.image); //PNG wrap 
UIImage* img = [UIImage imageWithData:pngdata];
UIImageWriteToSavedPhotosAlbum(img, nil, nil, nil);