Question

我试图在我的物理设备上运行我的React Native应用程序，但是每次遇到此错误

TypeError: Super expression must either be null or a function
[Mon Oct 26 2020 10:37:19.635]  ERROR    Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication)
[Mon Oct 26 2020 10:37:19.636]  ERROR    Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication)
[Mon Oct 26 2020 10:37:19.637]  ERROR    Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication)

所以我尝试只渲染一个简单的文本

export default class App extends Component {
  render() {
    return (
      <View>
        <Text>Hello</Text>
      </View>
    );
  }
}

但是仍然出现该错误，为什么？谁能告诉我发生了什么事？

我的index.js

import {AppRegistry} from 'react-native';
import App from './App';
import {name as appName} from './app.json';

AppRegistry.registerComponent(appName, () => App);

Answer 1

尝试将Contructor添加到App组件，并在构造函数的第一行中调用super(props)

React Native，TypeError：超级表达式必须为null或函数

1 个答案: