show half image and hide empty support?

[beiliubei]

eg.
maxRating = 5.0
rating = 2.5

[estemendoza]

It's already implemented, use the following

_starRatingImage.displayMode=EDStarRatingDisplayHalf;

[w4-steve]

Seems it has a bug for it. If I use an empty image like UIImage() for starImage(not highlighted) then it works not as I expected.
233: CGPoint starPoint = [self pointOfStarAtPosition:i highlighted:NO];
this should be
233: CGPoint starPoint = [self pointOfStarAtPosition:i highlighted:YES];