反应导航示例 JS 语法

Question

我不明白navigation是从哪里来的(第 46-48 行(：

https://github.com/react-community/react-navigation/blob/master/examples/NavigationPlayground/js/StacksOverTabs.js

Answer 1

const MyHomeScreen = ({ navigation }) => ( <MyNavScreen banner="Home Screen" navigation={navigation} /> );

等于

class MyHomeScreen extends React.Component{
constructor(props){
    super(props);
}
render(){
    const {navigation} = this.props;
    return <MyNavScreen banner="Home Screen" navigation={navigation} />
}}