undefined is not a function (evaluating '_this._registerEvents()')

问题

After i deleted my src folder in order to refactor this error occurred. I believe this is a caching issue? I tried following this gist but no luck.

"react": "16.4.1",

"react-native": "0.56.1",

"@babel/core": "^7.1.2",

"presets": ["react-native"]

`

import React, { Component } from 'react';
import { Platform, Text, View } from 'react-native';
import { Provider } from 'react-redux';
import { store } from './src/redux/store';


export default class App extends Component<Props> {
    state = {
        isLoadingComplete: false,
    };

    render() {
        return (

            <View>
                <Text>Hello??</Text>
                <Text>Hello??</Text>
                <Text>Hello??</Text>
                <Text>Hello??</Text>
                <Text>Hello??</Text>
                <Text>Hello??</Text>
                <Text>Hello??</Text>
            </View>
        );
    }
}

`

回答1:

Open your terminal/CMD/shell and run these commands one after another

cd yourProjectDiectory  ----> navigate to your project directory

watchman watch-del-all

rm -rf node_modules/.cache

react-native start --resetCache

回答2:

close your server and run npm start -- --reset-cache then reload the app

回答3:

I had this problem after upgrade of React-native to 0.58.1.
None of the above answers worked for me. I tried to upgrade to 0.58.6, didn't help.

The problem was solved after upgrading to react-native 0.59.1.

来源：https://stackoverflow.com/questions/52713101/undefined-is-not-a-function-evaluating-this-registerevents