react-navigation的回调方法callback

发布时间：2020-12-15 06:40:31 所属栏目：百科来源：网络整理

导读：screenA const DEMO_TOKEN = await AsyncStorage.getItem( 'id_token' ); if (DEMO_TOKEN === null ) { this .props.navigation.navigate( 'screenB' ,{ onGoBack : () = this .refresh(),}); return - 3 ; } else { this .doSomething(); }refresh() { this

screenA

const DEMO_TOKEN = await AsyncStorage.getItem('id_token');
  if (DEMO_TOKEN === null) {
    this.props.navigation.navigate('screenB',{
      onGoBack: () => this.refresh(),});
    return -3;
  } else {
    this.doSomething();
  }
refresh() {
  this.doSomething();
}

screenB

await AsyncStorage.setItem('id_token',myId);
this.props.navigation.state.params.onGoBack();
this.props.navigation.goBack();

（编辑：李大同）

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