title: Don't get the value after submitting form
body: <p>I have 2 Switches in my form. Each switch has its own default value (one is checked, and another not). The issue appears when i try to submit the form without changing the switches, because i get undefined for each switch, in console. 
  How to get the values if the user won't change the switches and will click on submit button?</p>
  
  <p>link to code: <a href="https://codesandbox.io/s/basic-usage-ant-design-demo-o3kro?file=/index.js" rel="nofollow noreferrer">https://codesandbox.io/s/basic-usage-ant-design-demo-o3kro?file=/index.js</a></p>