情況通報：
因為是我的二維碼模塊報錯，提示報錯代碼如下
重要信息是下面的紅色字體部分（Android 模擬器紅屏）
undefined is not an object (evaluating '_react2.PropTypes.func')
<unknown>
D:\CDM_POS_APP\pos_shouy\node_modules\react-native-smart-barcode\Barcode.js:38:33
loadModuleImplementation
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:178:12
guardedLoadModule
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:130:36
_require
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:110:20
<unknown>
D:\CDM_POS_APP\pos_shouy\src\QrcodeView.js:17
loadModuleImplementation
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:178:12
guardedLoadModule
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:130:36
_require
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:110:20
<unknown>
D:\CDM_POS_APP\pos_shouy\App.js:31
loadModuleImplementation
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:178:12
guardedLoadModule
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:130:36
_require
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:110:20
<unknown>
D:\CDM_POS_APP\pos_shouy\index.js:2
loadModuleImplementation
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:178:12
guardedLoadModule
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:123:45
_require
D:\CDM_POS_APP\pos_shouy\node_modules\metro-bundler\src\Resolver\polyfills\require.js:110:20
global code
解決辦法：
找到錯誤位置的：D:\CDM_POS_APP\pos_shouy\node_modules\react-native-smart-barcode\Barcode.js
PropTypes 放在了react 中引入，但是還是出錯
Undefined is not an object(evaluating ‘_react2.PropTypes.func’)
正確寫法：
import React, { Component } from 'react';
import PropTypes from 'prop-types';
把PropTypes 從prop-types 中引入
最終截圖：
