react-native-root-view by AppRegistry.registerComponent

react-native-root-view.js

/**
 * react-native-root-view
 *
 * @article https://www.jianshu.com/p/2c79684481b3
 * @auth https://github.com/1uokun
 * */

import React, { Component } from 'react';
import { StyleSheet, AppRegistry, View, ScrollView, DeviceEventEmitter } from 'react-native';

class RootView extends Component {
  constructor(props) {
    super(props);
    this.state = {
      toast: [],
    };
  }

  render() {
    return (
      React.Children.count(this.state.toast) > 0 && <View style={StyleSheet.absoluteFill} pointerEvents="box-none">
        {this.state.toast}
      </View>
    );
  }

  componentDidMount() {
    DeviceEventEmitter.addListener('rootView_add', this.set, this);
    DeviceEventEmitter.addListener('rootView_remove', this.remove, this);
  }

  componentWillUnmount(): void {
    DeviceEventEmitter.removeListener('rootView_add', this.set);
    DeviceEventEmitter.removeListener('rootView_remove', this.remove);
  }

  set = (view) => {
    if (React.isValidElement(view)) {
      this.setState({ toast: [view] });
    }
  };

  remove = () => {
    this.setState({ toast: [] });
  };
}

AppRegistry.setWrapperComponentProvider(function() {
    return function RootSiblingsWrapper(props) {
        return (
        <React.Fragment>
          <ScrollView
            contentContainerStyle={{ flex:1 }}
            collapsable={false}
            bounces={false}>
            {props.children}
          </ScrollView>
          <RootView />
        </React.Fragment>
        );
    };
});

export default {
  set(view) {
    DeviceEventEmitter.emit('rootView_add', view);
  },
  remove() {
    DeviceEventEmitter.emit('rootView_remove');
  },
};

Q: rootView will nest scroll, how to fix?

A: ScrollView wrapper children and set contentContainerStyle & collapsable & bounces prop like this ⬇️

AppRegistry.setWrapperComponentProvider(function() {
    return function RootSiblingsWrapper(props) {
        return (
        <React.Fragment>
-            {props.children}
+            <ScrollView
+               contentContainerStyle={{ flex:1 }}
+               collapsable={false}
+               bounces={false}>
+               {props.children}
+           </ScrollView>
            <RootView />
        </React.Fragment>
        );
    };
});