React Native + Redux Form - Use keyboard next button to go to next TextInput field

This solution passes props from the Form component to the RenderInput component and passes a function call back.

Here's the code:

class RenderInput extends Component {
   const { input, refField, onEnter,
        meta: { touched, error, warning },
        input: { onChange } } = this.props
   render() {
      return (
         <TextInput
            ref = {refField}
            returnKeyType = {'next'}
            onChangeText={onChange}
            onBlur={input.onBlur}
            onFocus={input.onFocus}
            onSubmitEditing={onEnter}/>
      )
   }
}

class Form extends Component {
   render() {
      return (
         <Field
            name="field1"
            focus
            withRef
            ref={(componentRef) => this.field1 = componentRef}
            refField="field1"
            component={RenderInput}
            onEnter={() => { 
               this.field2.getRenderedComponent().refs.field2.focus()
            }}/>

         <Field
            name="field2"
            withRef
            ref={(componentRef) => this.field2 = componentRef}
            refField="field2"
            component={RenderInput}/>
      )
   }
} 

So what happened here?

1. I assign the ref to local scope with ref={(componentRef) => this.field1 = componentRef} as @Ksyqo suggested. Thanks for the hint.

2. I pass refField="field1" to the RenderInput and assign the value to the input ref property ref = {refField}. This will add the input object to the refs property.

3. I assigned a onEnter function in the Field

4. I pass the function to the props of RenderInput and assign it to the onSubmitEditing={onEnter} function. Now we have bind the two functions together. That means if onSubmitEditing gets invoked the onEnter function gets invoked as well

5. Finally, refer to the local field field2, get the rendered Component and use the refs, which we assigned in the Input field, to set the focus. this.field2.getRenderedComponent().refs.field2.focus()

I don't know if this is the most elegant solution but it works.