反应导航：检测应用导航到哪个屏幕

Question

我有2个组成部分：仪表板-应用程序的入口点帖子在仪表板中，componentDidMount中有一个API调用。在“帖子”组件中，收到帖子后，我导航至“仪表板”。是否可以检测应用是否已从“帖子”导航到“仪表板”并删除componentDidMount中的API调用。检查以下代码：// Dashboard.js componentDidMount() {   this.handleApiCall(); // default axios get request// Here I need to detect if the user was navigated to Dashboard from Posts or other component}// Posts.js  handleNavigation = () => {    this.setState({      isOpen: false,    });      this.props.navigation.navigate('Dashboard'); };

Answer 1

尝试传递来自的参数 Posts.js

// Dashboard.js

componentDidMount() {

   const { navigation } = this.props;

   const fromPosts = navigation.getParam('fromPosts', false);

   if(!fromPosts) {

     this.handleApiCall(); // default axios get request

   }

}

// Posts.js

handleNavigation = () => {

    this.setState({

      isOpen: false,

    });

    this.props.navigation.navigate('Dashboard', {fromPosts: true});

 };