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

This happens when the project has an older version of react native. You can update the react version or for people who do not want to upgrade, just open the .xcodeproj file in iOS dir and hit the play button in the Xcode.