Question

初始化的rn项目,输入react-native run-ios报错

Xcode 9.2, 可以正常从中正常打开模拟机。但是一个react-native init的项目 运行react-native run-ios时就报错。报错信息：Scanning folders for symlinks in /Users/sunkang/Desktop/demomodan/node_modules (14ms)Found Xcode project demomodan.xcodeprojxcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrunCommand failed: xcrun instruments -sxcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun就是跑不起来，找到ios下的xcodeproj文件在xcode打开就是一大堆叹号,是哪里的问题呢，环境应该配好了吧，哪位大神可以来帮帮忙，应该怎么做rn代码可以在模拟机上跑起来，急

Answer 1

没装xcode吗