title: react-native call onSubmit() when pressed returnKeyType
body: <p>I'm new to react-native. </p>
  
  <p>I'm struggling on keyboard now. I have TextInput and a button. What I want is that, when user entered input through keyboard, he/she can go to next page with just one click on the return button. So what I simply want is that onSubmit method should be called when user clicks "return" button on keyboard.
  Is there anyone can help me?</p>