-- (CGSize) sizeOfMarkup:(NSString *)markup forWidth:(float)width;
-- (CGSize) sizeOfString:(NSString *)string withStyle:(NSString *)style forWidth:(float)width;
+- (CGSize) sizeOfMarkup:(NSString *)markup forWidth:(CGFloat)width;
+- (CGSize) sizeOfString:(NSString *)string withStyle:(NSString *)style forWidth:(CGFloat)width;