ios TextField限制输入两位小数

只需要实现textField的这个代理方法就可以实现

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

    NSMutableString * futureString = [NSMutableString stringWithString:textField.text];

    [futureString  insertString:string atIndex:range.location];

    NSInteger flag=;

    const NSInteger limited = ;//小数点后需要限制的个数

    for (int i = futureString.length-; i>=; i--) {

        if ([futureString characterAtIndex:i] == '.') {

            if (flag > limited) {

                return NO;

            }

            break;

        }

        flag++;

    }

    return YES;

}

楼主亲测好使！