Since upgrading to Xcode 10.2 I can no longer run react-native run-ios through the cli

Question

I upgraded to Xcode 10.2 today, since upgrading I can't run react-native run-ios through the cli:

react-native run-ios --simulator="iPhone X"

Found Xcode workspace a.xcworkspace

Could not find iPhone X simulator

Error: Could not find iPhone X simulator
    at resolve (/Users/user/Documents/work/a/a-light-ui/node_modules/react-native/local-cli/runIOS/runIOS.js:149:13)
    at new Promise (<anonymous>)
    at runOnSimulator (/Users/user/Documents/work/a/a-light-ui/node_modules/react-native/local-cli/runIOS/runIOS.js:134:10)
    at Object.runIOS [as func] (/Users/user/Documents/work/a/a-light-ui/node_modules/react-native/local-cli/runIOS/runIOS.js:106:12)
    at Promise.resolve.then (/Users/user/Documents/work/a/a-light-ui/node_modules/react-native/local-cli/cliEntry.js:117:22)    

If I run xcrun simctl list devices all of the simulators show (Shutdown) (unavailable, runtime profile not found):

iPhone X (7AADFA50-7B57-4A40-8434-9A86F345D7ED) (Shutdown) (unavailable, runtime profile not found)

Has anyone else had this issue with RN since upgrading xcode to 10.2? It still works through Xcode.. but that means opening Xcode.

Answer 1

I solved like this ;

Firstly, you need to go this path

node_modules/react-native/local-cli/runIOS/findMatchingSimulator.js

and then;

You need to change this code

if (!version.startsWith('iOS') && !version.startsWith('tvOS'))

with

if (!version.startsWith('com.apple.CoreSimulator.SimRuntime.iOS') && !version.startsWith('com.apple.CoreSimulator.SimRuntime.tvOS'))

I hope, it will be helpful,

ref : https://github.com/facebook/react-native/issues/21498#issuecomment-476621627

Answer 2

I thought I would add my solution here too, in hopes to help someone. I just upgraded to Mac OS Mojave and I also upgraded to Xcode 10.2. My whole react native project broke, real bad. So then I downgraded Xcode back to 10.1. Then, I started to see this error, in said after running react-native run-ios:

Could not find iPhone X simulator

the above "hack" fixed it by editing the findMatchingSimulator.js file with the updates above.

Then, react-native run-ios got farther, next error was:

:CFBundleIdentifier, does not exist

I fixed this by:

1. cd node_modules/react-native/third-party/glog* TabEnter
2. ./configure

Now react-native run-ios works . I hope this helps someone, this was a pain in the @ss.