React native 做扫描二维码 遇到的 问题

Question

使用React native做项目，遇到要扫描二维码的问题。
使用ac-qrcode
如下：

项目的依赖如下：

"dependencies": {
    "ac-qrcode": "^1.0.0",
    "react": "16.3.1",
    "react-native": "0.55.4",
    "react-native-simple-toast": "0.0.8",
    "react-navigation": "^2.5.5"
  },
  "devDependencies": {
    "babel-jest": "23.2.0",
    "babel-preset-react-native": "4.0.0",
    "jest": "23.2.0",
    "react-test-renderer": "16.3.1"
  },
  "jest": {
    "preset": "react-native"
  }

有对这个问题了解的大神，求指教一下。
跪求。感谢。。