Tenn's WorkSpace

UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"

                                                                    style:UIBarButtonItemStyleDone target:self action:@selector(tapButton)];

    [rightButton setTintColor:[UIColor colorWithRed:0.0/255.0 green:200.0/255.0 blue:0.0/255.0 alpha:1.0]];

    self.navigationItem.rightBarButtonItem = rightButton;

NSString < -> CFStringRef

NSString *nsStr = (__bridge NSString *)cfStrRef;

http://stackoverflow.com/questions/640367/how-to-convert-cfstringref-to-nsstring

문자열에서 숫자만 뽑아내기

 NSString *newString = [[origString componentsSeparatedByCharactersInSet:

            [[NSCharacterSet decimalDigitCharacterSet] invertedSet]] 

            componentsJoinedByString:@""];

http://stackoverflow.com/questions/1129521/remove-all-but-numbers-from-nsstring