[ios] TextField 특정 문자만 사용하도록 하기

hooni

Views 2770 Comment 0

Shortcut

PrevPrev Article

NextNext Article

Larger Font Smaller Font Up Down Go comment Print

Shortcut

PrevPrev Article

NextNext Article

Larger Font Smaller Font Up Down Go comment Print

Xcode의 TextField 사용할때 특정 문자만 입력 받도록 하기 위해서는 다음과 같이 한다.

예) 숫자와 영문자만 입력 받기

#define LEGAL_TEXT @"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz "

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
     NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:LEGAL_TEXT] invertedSet];
     NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
     return [string isEqualToString:filtered];
}

예2) 숫자와 소수점만 입력 받기 (소수점이 입력된 뒤에는 숫자만 입력 받는다)

키패드 타입을 변경

entryField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;

#define NUMBERS	@"0123456789"
#define NUMBERSPERIOD	@"0123456789."

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    NSCharacterSet *cs;
    NSString *filtered;

    // Check for period
    if ([entryField.text rangeOfString:@"."].location == NSNotFound)
    {
        cs = [[NSCharacterSet characterSetWithCharactersInString:NUMBERSPERIOD] invertedSet];
        filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
        return [string isEqualToString:filtered];
    }

    // Period is in use
    cs = [[NSCharacterSet characterSetWithCharactersInString:NUMBERS] invertedSet];
    filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
    return [string isEqualToString:filtered];
}

[출처] http://comxp.tistory.com/250