很抱歉，昨天我能使所有这些正常工作，但今天我无法让Expo附加到我的VS Code Debugger上，出现了各种问题。
目前，我没有服务器在运行。世博会已在我的模拟器中打开。我从VS Code的“ Expo in Expo”中点击了“运行”，并且收到此错误：
(node:16799) UnhandledPromiseRejectionWarning: Error: `fsevents` unavailable (this watcher can only be used on Darwin)
at new FSEventsWatcher (/Users/TuzMacbookPro2017/Development/QMG/Learning/Tuz1App/node_modules/sane/src/fsevents_watcher.js:41:11)
at createWatcher (/Users/TuzMacbookPro2017/Development/QMG/Learning/Tuz1App/node_modules/jest-haste-map/build/index.js:780:23)
at Array.map (<anonymous>)
at HasteMap._watch (/Users/TuzMacbookPro2017/Development/QMG/Learning/Tuz1App/node_modules/jest-haste-map/build/index.js:936:44)
at _buildPromise._buildFileMap.then.then.hasteMap (/Users/TuzMacbookPro2017/Development/QMG/Learning/Tuz1App/node_modules/jest-haste-map/build/index.js:355:23)
at processTicksAndRejections (internal/process/next_tick.js:81:5)
(node:16799) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:16799) [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.
[Error] Error: Could not start the packager.
让我们启动服务器，看看会发生什么... 服务器负载，一切都很好。我尚未从“地铁”屏幕中选择“运行”。
让我们再次尝试运行调试器，看看会发生什么...
Error: listen EADDRINUSE: address already in use :::8081
at Server.setupListenHandle [as _listen2] (net.js:1256:14)
at listenInCluster (net.js:1304:12)
at Server.listen (net.js:1392:7)
etc...
可以理解，npm运行在端口8081上。当我这样做时，它会打开一个chrome调试窗口。让我们点击“停止远程调试”，看看是否可以再次从VS Code运行调试器（可能由于端口仍在使用中而无法。-是的，同样的错误。）
好吧，现在我们已经在expo中禁用了远程调试，让我们停止服务器，也许尝试从VS Code重新启动？不。简单错误：
[Error] Error: Could not start the packager.
有帮助吗？我知道我应该写下我昨天采取的所有步骤！