Simple 5 star rating view derived from Ray Wenderlich tutorial: http://bit.ly/1fm1rPB
##Preview
##Properties @property (nonatomic, weak) NSObject *delegate;
BTRatingView delegate object.
@property (nonatomic, strong) UIImage *emptyStarImage;
Image placeholder for empty star.
@property (nonatomic, strong) UIImage *halfFullStarImage;
Image for half full star.
@property (nonatomic, strong) UIImage *fullStarImage;
Image for full star.
@property (nonatomic, assign) BOOL editable;
Boolean value if user interaction is enabled.
@property (nonatomic, assign) CGFloat rating;
Current rating value.
@property (nonatomic, assign) NSInteger maxRating;
Max rating stars. Defaults to 5.
@property (nonatomic, assign) NSInteger midMargin;
Mid margin between stars.
@property (nonatomic, assign) NSInteger leftMargin;
Left margin.
@property (nonatomic, assign) CGSize minImageSize;
Minimal image size.
- (void)ratingView:(BTRatingView *)ratingView ratingDidChange:(float)rating;
Delegate method when rating value did change.