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