iOS---限制文本框只能输入数字(转载)

// 将UITextField的Keyboard设置为Number Pad

// viewController实现UITextFieldDelegate

//设置文本框只能输入数字

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

//如果是限制只能输入数字的文本框

if (_moneyTextField==textField) {

return [self validateNumber:string];

}

//否则返回yes,不限制其他textfield

return YES;

}

- (BOOL)validateNumber:(NSString*)number {

BOOL res =YES;

NSCharacterSet* tmpSet = [NSCharacterSetcharacterSetWithCharactersInString:@"0123456789"];

int i =0;

while (i < number.length) {

NSString * string = [numbersubstringWithRange:NSMakeRange(i,1)];

NSRange range = [stringrangeOfCharacterFromSet:tmpSet];

if (range.length ==0) {

res =NO;

break;

}

i++;

}

return res;

}

原文章出处：http://blog.csdn.net/iotjin/article/details/49932977。