在使用React Native过程中会遇到许多问题导致iOS端编译失败，一下是一个测试成功的配置：

{
    "name": "NavigationDemo",
    "version": "0.0.1",
    "private": true,
    "scripts": {
        "start": "node node_modules/react-native/local-cli/cli.js start",
        "test": "jest"
    },
    "dependencies": {
        "react": "16.0.0-alpha.6",
        "react-native": "0.44.3"
    },
    "devDependencies": {
        "babel-jest": "20.0.3",
        "babel-preset-react-native": "2.1.0",
        "jest": "20.0.4",
        "react-test-renderer": "16.0.0-alpha.6"
    },
    "jest": {
        "preset": "react-native"
    }
}

在修改完package.json后记得把node-moudles文件夹删除，并在命令行中运行：
npm install以此重新加载相关依赖包。

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