React Navigation modal height

Question

How do I set the height a React Navigation modal view so once it has appeared it will only cover about half of the screen from the bottom up, and the view below remains visi

Answer 1

if you want to use react native Modal you can make parent view transparent and add a view at the bottom

<Modal
      animationType="slide"
      transparent={true}
      visible={props.visible}
    >
     <View
          style={{
             backgroundColor:'transparent',
             flex:1,
             justifyContent:'flex-end'
                 }}>
          <View
               style={{
                   backgroundColor:'green',
                   height:'20%'
                 }}>
               <Text>Hello World!</Text>
               <TouchableHighlight
                    onPress={props.closeModal}>
                     <Text>Hide Modal</Text>
               </TouchableHighlight>
          </View>
    </View>
 </Modal>

Answer 2

For react-navigation v3.x you can use the prop transparentCard: true, you can see more details here: https://stackoverflow.com/a/55598127/6673414

Answer 3

Here's an example of how to achieve this in react-navigation v3.x:

App Container

const TestRootStack = createStackNavigator(
  {
    TestRoot: TestRootScreen,
    TestModal: {
      screen: TestModalScreen,
      navigationOptions: {
        /**
         * Distance from top to register swipe to dismiss modal gesture. Default (135)
         * https://reactnavigation.org/docs/en/stack-navigator.html#gestureresponsedistance
         */
        gestureResponseDistance: { vertical: 1000 }, // default is 135 },
      },
    },
  },
  {
    headerMode: 'none',
    mode: 'modal',
    transparentCard: true,
  },
);

const AppContainer = createAppContainer(TestRootStack);

Root Screen

class TestRootScreen extends React.Component {
  render() {
    return (
      <SafeAreaView style={styles.container}>
        <Button title="Show Modal" onPress={() => this.props.navigation.navigate('TestModal')} />
      </SafeAreaView>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: 'blue',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

Modal Screen

class TestModalScreen extends React.Component {
  render() {
    return (
      <SafeAreaView style={styles.container}>
        <View style={styles.innerContainer} />
      </SafeAreaView>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: 'transparent',
    justifyContent: 'flex-end',
  },
  innerContainer: {
    position: 'absolute',
    bottom: 0,
    left: 0,
    right: 0,
    top: 100,
    backgroundColor: 'red',
  },
});

Answer 4

In your stacknavigator you can set these options:

  mode: 'modal',
    headerMode: 'none',
    cardStyle:{
      backgroundColor:"transparent",
      opacity:0.99
  }

And in your modal screen:

class ModalScreen extends React.Component {

  render() {
    return (
      <View style={{ flex: 1 ,flexDirection: 'column', justifyContent: 'flex-end'}}>
          <View style={{ height: "50%" ,width: '100%', backgroundColor:"#fff", justifyContent:"center"}}>
            <Text>Testing a modal with transparent background</Text>
          </View>
      </View>
    );
  }
}

Also you can refer to this expo snack https://snack.expo.io/@yannerio/modal that I've created to show how it works, or you could use React Native Modal