React-native ios Podfile 问题与“use_native_modules!”

在我的反应本机项目中（[电子邮件受保护] /cdn-cgi/l/email-protection）在我运行的 ios/ 目录中pod install并得到这个错误：

[!] Invalid `Podfile` file: no implicit conversion of nil into String.

 #  from /Users/coryrobinson/projects/hhs2/ios/Podfile:37
 #  -------------------------------------------
 #  
 >    use_native_modules!
 #  end
 #  -------------------------------------------

我没有在这个 Podfile 中添加或更改任何内容 - 它都是反应原生生成的。 （我在 iOS 开发方面没有经验，所以这可能是一个简单的修复，我只是不知道要寻找什么:-|）感谢您的帮助！

这是我的 Podfile

platform :ios, '9.0'
require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'

target 'hhs2' do
  # Pods for hhs2
  pod 'React', :path => '../node_modules/react-native/'
  pod 'React-Core', :path => '../node_modules/react-native/React'
  pod 'React-DevSupport', :path => '../node_modules/react-native/React'
  pod 'React-fishhook', :path => '../node_modules/react-native/Libraries/fishhook'
  pod 'React-RCTActionSheet', :path => '../node_modules/react-native/Libraries/ActionSheetIOS'
  pod 'React-RCTAnimation', :path => '../node_modules/react-native/Libraries/NativeAnimation'
  pod 'React-RCTBlob', :path => '../node_modules/react-native/Libraries/Blob'
  pod 'React-RCTImage', :path => '../node_modules/react-native/Libraries/Image'
  pod 'React-RCTLinking', :path => '../node_modules/react-native/Libraries/LinkingIOS'
  pod 'React-RCTNetwork', :path => '../node_modules/react-native/Libraries/Network'
  pod 'React-RCTSettings', :path => '../node_modules/react-native/Libraries/Settings'
  pod 'React-RCTText', :path => '../node_modules/react-native/Libraries/Text'
  pod 'React-RCTVibration', :path => '../node_modules/react-native/Libraries/Vibration'
  pod 'React-RCTWebSocket', :path => '../node_modules/react-native/Libraries/WebSocket'
  pod 'RNFS', :path => '../node_modules/react-native-fs'

  pod 'React-cxxreact', :path => '../node_modules/react-native/ReactCommon/cxxreact'
  pod 'React-jsi', :path => '../node_modules/react-native/ReactCommon/jsi'
  pod 'React-jsiexecutor', :path => '../node_modules/react-native/ReactCommon/jsiexecutor'
  pod 'React-jsinspector', :path => '../node_modules/react-native/ReactCommon/jsinspector'
  pod 'yoga', :path => '../node_modules/react-native/ReactCommon/yoga'

  pod 'DoubleConversion', :podspec => '../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec'
  pod 'glog', :podspec => '../node_modules/react-native/third-party-podspecs/glog.podspec'
  pod 'Folly', :podspec => '../node_modules/react-native/third-party-podspecs/Folly.podspec'

  target 'hhs2Tests' do
    inherit! :search_paths
    # Pods for testing
  end

  use_native_modules!
end

target 'hhs2-tvOS' do
  # Pods for hhs2-tvOS

  target 'hhs2-tvOSTests' do
    inherit! :search_paths
    # Pods for testing
  end

end

这是正确的答案：

1 - 你的Podfile应该在顶部包含这一行

require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'

2 - 确保您的package.json and node_module文件夹已安装此模块

cli-platform-ios/native_modules

3 - 如果运行后没有找到yarn install- 意味着您的计算机中有旧的缓存node_modules，您需要在再次重新安装软件包之前清理它。

4 - 清理缓存yarn cache clean

5 - 确保您拥有此文件react-native.config.js并且它的配置是有效的 - 并且它没有不存在的 NPM 包 - 这一步是最后也是最主要的错误原因

我的例子react-native.config.js

module.exports = {
  project: {
    ios: {},
    android: {},
  },
  assets: ['./assets/fonts/'],
  dependencies: {}, // make sure this dependencies are all valid installed packages or empty if you don't need it
};

6 - 安装节点包yarn install您的 pod 现在应该可以工作了！pod install --repo-update

编码愉快！