情况通报：

因为是我的二维码模块报错，提示报错代码如下

重要信息是下面的红色字体部分（Android 模拟器红屏）

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

解决办法：

找到错误位置的：D:\CDM_POS_APP\pos_shouy\node_modules\react-native-smart-barcode\Barcode.js

PropTypes 放在了react 中引入，但是还是出错
Undefined is not an object(evaluating ‘_react2.PropTypes.func’)

正确写法：

import React, { Component } from 'react';

import PropTypes from 'prop-types';

把PropTypes 从prop-types 中引入

最终截图：