Question: I am trying to navigate my first page to the second page by tapping a button.
Once we are at the second page, we will never go back by pressing back button.

Just tap, switch, and never go back.

Is there any simple way to do this? 
I mean, I just don't want to use the component Navigation or Navigator. They are too complex.

Answer: 
I'm using React Navigation from guide of Facebook.

You can read more about this library from:
<https://facebook.github.io/react-native/docs/navigation.html>

Or react navigation's website:
<https://reactnavigation.org/docs/intro/>
I don't know how complex your app is, but if it's really simple you can do it this way:

```
const setScreen = (screen) => {
  setState({screen: screen})
}

render() {
  <View>
    {
      switch(this.state.screen) {
        case 'firstScreen': (
          <View>
            <Text>First Screen</Text>
            <TouchableHighlight onPress={this.setScreen('secondScreen')}>
              <Text>Go to second screen</Text>
            </TouchableHighlight>
          </View>
        )
        case 'secondScreen': (
          <View>
            <Text>Second Screen</Text>
            <TouchableHighlight onPress={this.setScreen('firstScreen')}>
              <Text>Go to first screen</Text>
            </TouchableHighlight>
          </View>
        )
      }
    }
  </View>
}

```