在 React Native 中将道具传递给屏幕 [英] Passing Props to Screens in React Native

问题描述

我已经开始学习 React Native，并且一如既往地从创建可重用组件开始.我学习了如何在创建自定义组件时传递和访问 props.

I have started to learn React Native and as always begin by creating reusable components. I learnt how you can pass and access props while creating custom components.

我想在 React Native 中创建一个基本屏幕，它具有通用属性并且我的应用程序中的所有屏幕都可以设置，例如标题.

I want to create a base screen in React Native, which has common properties and all screens in my app can set, like a title for example.

下面我正在为我的应用程序的主页创建一个新屏幕

Below I'm creating a new Screen for the home page of my app

class APCComponent extends Component {
    constructor(props) {
        super(props);
    }

    render() { //dummy function, will always get overridden in the child
        return (
            <View />
        );
    }
}

export default class Home extends APCComponent {
    //I somehow want to pass a string to the parent APCComponent
    //and want APCComponent use it to set the Header of the navigation

    constructor() {
        super({ title: 'Home' });
    }

    //Right now the following works, but in case I use a different type of Navigation,
    //I'll have to change all components. By just setting a string, I'm allowing my base
    //component to display the header
    static navigationOptions = { title: "Home" }; //from react-navigtion's StackNavigator

    render() {
        return <Button title="Sample Button" />;
    }
}

谢谢

推荐答案

class BaseComponent extends Component {
  render() {
    return (){
      <Header title={this.props.title} />
    }
  }
}

class HomeScreen extends Component {
  render() {
    return (){
      <BaseComponent title='this is your home screen' />
    }
  }
}

其中 Header 组件也是一个单独的可重用组件.

where Header component is also a separate reusable component.

你需要像上面的例子一样将 props(在我们的例子中是'title')从上层组件传递到基础层组件.

you need to pass props(in our case 'title') from the upper level component to base level components like the above example.

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