Cordova 无法添加插件：错误：找不到模块“unorm”

Question

我正在尝试向我的cordova 应用程序添加一个插件，但我收到一条错误消息，提示“平台“ios”似乎不是有效的cordova 平台。缺少API.js。不支持ios。”

node --version
v9.2.0

cordova --version
8.0.0

这是我正在运行的命令

cordova plugin add cordova-plugin-appinfo

以及完整的输出：

Installing "cordova-plugin-appinfo" for ios
Unable to load PlatformApi from platform. Error: Cannot find module 'unorm'
Failed to install 'cordova-plugin-appinfo': Error [ERR_UNHANDLED_ERROR]: Unhandled error. (The platform "ios" does not appear to be a valid cordova platform. It is missing API.js. ios not supported.)
    at EventEmitter.emit (events.js:140:19)
    at EventEmitter.module.exports.emit (/Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-common/src/events.js:71:17)
    at Object.getPlatformApiFunction (/Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/util.js:499:20)
    at Object.getPlatformApi (/Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/src/platforms/platforms.js:55:25)
    at handleInstall (/Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/src/plugman/install.js:593:29)
    at /Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/src/plugman/install.js:357:28
    at _fulfilled (/Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:787:54)
    at self.promiseDispatch.done (/Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:816:30)
    at Promise.promise.promiseDispatch (/Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:749:13)
    at /Users/james/.nvm/versions/node/v9.2.0/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:509:49
(node:35697) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Unhandled error. (The platform "ios" does not appear to be a valid cordova platform. It is missing API.js. ios not supported.)
(node:35697) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

我确定这是一个有效的 Cordova 项目，而且 iOS 平台似乎运行良好（我可以在 iPhone 上构建和运行）。

Answer 1

尝试更新 ios 平台后，我遇到了同样的错误。事实证明 node_modules 下载缓存中有一些损坏。我能够通过第二次尝试解决这个问题：

cordova platform rm ios 
cordova platform add ios@latest