问如何在componentWillMount中避免SetState

EN

  componentWillMount() {
    this._renderWelcomeSlidesWithAsyncStorage().done();
  }

  _renderWelcomeSlidesWithAsyncStorage = async () => {
    let value = await AsyncStorage.getItem('AlreadyVisited');

            if (value==='true'){
              this.setState({ShowWelcomeSlides: 'false'});
              console.log('token is present')
            }else{
              this.setState({ShowWelcomeSlides: 'true'});
              console.log('token is not present');
              this._setValue();
            }
        }; 

      onSlidesComplete = () => {
        this.props.navigation.navigate('Home');
      }

  render(){

    if (this.state.ShowWelcomeSlides==='true'){
        return(
        <Slides data={SLIDE_DATA} onComplete={this.onSlidesComplete} />
      );
    }return(
     <SkipWelcome />
    );