How to detect OnResume and onPause on react native Es6

问题

How can I detect any method from background to foreground es6?

Is this possible in React-native? and is there any class or tool that could help with this type of method?

回答1:

Try this, it working for me

import React, {Component} from 'react'
import {AppState, Text} from 'react-native'

class AppStateExample extends Component {

  state = {
    appState: AppState.currentState
  }

  componentDidMount() {
    AppState.addEventListener('change', this._handleAppStateChange);
  }

  componentWillUnmount() {
    AppState.removeEventListener('change', this._handleAppStateChange);
  }

  _handleAppStateChange = (nextAppState) => {
    if (this.state.appState.match(/inactive|background/) && nextAppState === 'active') {
      console.log('App has come to the foreground!')
    }
    this.setState({appState: nextAppState});
  }

  render() {
    return (
      <Text>Current state is: {this.state.appState}</Text>
    );
  }

}

来源：https://stackoverflow.com/questions/50020342/how-to-detect-onresume-and-onpause-on-react-native-es6