无法运行项目

Question

我也在Xcode首选项中选择了Location，但得到了同样的错误。

xcrun: error: Failed to determine realpath of '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.4.sdk' (errno=No such file or directory)
xcrun: error: unable to find utility "instruments", not a developer tool or in PATH

Command failed: xcrun instruments -s
xcrun: error: Failed to determine realpath of '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.4.sdk' (errno=No such file or directory)
xcrun: error: unable to find utility "instruments", not a developer tool or in PATH

Error: Command failed: xcrun instruments -s
xcrun: error: Failed to determine realpath of '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.4.sdk' (errno=No such file or directory)
xcrun: error: unable to find utility "instruments", not a developer tool or in PATH

at checkExecSyncError (child_process.js:601:13)
at Object.execFileSync (child_process.js:621:13)
at Object.runIOS [as func] (/Users/ranjith/Documents/Project/Login_React/node_modules/react-native/local-cli/runIOS/runIOS.js:76:17)
at Promise.resolve.then (/Users/ranjith/Documents/Project/Login_React/node_modules/react-native/local-cli/cliEntry.js:117:22)
at <anonymous> 

Answer 1

检查Xcode命令行工具是否已配置好 正确地走以下路径

打开Xcode > Preferences > Locations。

然后设置命令行工具

Answer 2

在我的例子中，Xcode更新导致iPhoneOS-12.2.sdk不再可用，取而代之的是包含iPhoneOS-12.4.sdk的路径。但是，在我的案例中，Xcode更新导致iPhoneOS-12.2.sdk不再可用；相反，路径中包含了iPhoneOS-12.4.sdk。react-native run-ios 抱怨找不到 12.2.

重新启动电脑，问题就解决了。

Answer 3

你是否安装了XCode和命令行工具？