iOS project xcode simulator does not work, and finally locates the problem in the start startup times error:
png](/img/bVbcf8y)
:
according to the error query results are as follows:
1. Delete the bundle folder under the ios directory, re-execute react-native run-ios startup-invalid
2, delete the node_modules folder, Re-execute npm install download dependency (dependent version problem / incomplete download, etc.)-invalid
3, network agent problem (global agent becomes automatic agent)-invalid
4, shut down simulator reopen-invalid
also ask for your help