React Native: Command `run-ios` unrecognized

Question

I have two different ReactNative-Projects:

• a) a project from januar 2016
• b) a complete new react-native project from now (march 20th 2016)

Answer 1

What caused this for me was running npm install --save axios when actually the system was previously using yarn instead of npm.

To solve this, instead of deleting the node_modules folder, which can lead to more problems, and if you prefer to run npm anyway or don't have a preference either way, the error should have instructed for you to run npm install. If you literally follow those instructions, you will be able to run: react-native run-ios afterwards.

Answer 2

For me, the only thing that worked was to checkout again my repository from zero and run:

npm install -g react-native-cli yarn 
yarn  
git submodule update --init --recursive

Answer 3

In my case, it was an issue with the package.json file. I deleted a section during a test. I recover a previous file with the deleted section and everything was working again.

Answer 4

I created a brand new react-native project using
$ react-native init projectName
and ran from root of the project
$ react-native run-ios
Everything worked fine and iOS simulator fired up as expected.

Than I installed prop-types node module using npm install prop-types --save. Re-ran $ react-native run-ios and ran into this error Command run-ios unrecognized

Solution: From the root of my project, removed node_module and re-installed modules using npm. Commands below

$ rm -rf node_modules/
$ npm install
$ react-native run-ios

Answer 5

Delete the node-modules. Its because the packages are not installed.

rm -rf node_modules npm install

then run your project

react-native run-ios

Answer 6

this works for me

sudo npm install -g react-native-cli --force 

then

react-native run-ios