CodeIgniter Json Ajax数据库插入不起作用

<?php
class MyController extends CI_Controller {
    public function insertData() {
        // 接收前端传递的数据
        $data = $this->input->post();

        // 数据库插入操作
        $this->db->insert('my_table', $data);

        // 返回插入成功的消息
        $response = array('status' => 'success', 'message' => 'Data inserted successfully');
        echo json_encode($response);
    }
}
?>

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
    $(document).ready(function() {
        $('#submitBtn').click(function() {
            // 获取表单数据
            var formData = {
                'name': $('#name').val(),
                'email': $('#email').val()
            };

            // 发送Ajax请求
            $.ajax({
                type: 'POST',
                url: '<?php echo base_url("mycontroller/insertdata"); ?>',
                data: formData,
                dataType: 'json',
                success: function(response) {
                    // 处理返回的数据
                    if (response.status == 'success') {
                        alert(response.message);
                    } else {
                        alert('Data insertion failed');
                    }
                }
            });
        });
    });
</script>

<form>
    <input type="text" id="name" placeholder="Name">
    <input type="email" id="email" placeholder="Email">
    <button type="button" id="submitBtn">Submit</button>
</form>