Query: warn no apps connected. sending “reload” to all react native apps failed. make sure your app is running in the simulator or on a phone connected via USB.
This warning message usually occurs when you are trying to send the “reload” command to your React Native apps, but the command fails because no apps are connected or running properly. To resolve this issue, you need to ensure that your app is running either on a simulator or on a phone connected via USB.
When running a React Native app, it needs to be either running on a simulator on your computer or on a physical device connected via USB in order for the “reload” command to work successfully. If the app is not running, or if it is running on a disconnected or invalid simulator or device, the command will fail and the warning message will be shown.
Here are some examples of how to resolve this issue:
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Running on a simulator:
- Open your React Native project in a terminal or command prompt.
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Run the command:
npx react-native run-iosfor iOS ornpx react-native run-androidfor Android. - Make sure the simulator is open and running on your computer.
- Once the app is built and running on the simulator, try sending the “reload” command again.
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Running on a physical device via USB:
- Connect your Android or iOS device to your computer using a USB cable.
- Open your React Native project in a terminal or command prompt.
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Run the command:
npx react-native run-iosfor iOS ornpx react-native run-androidfor Android. - Once the app is built and running on the connected physical device, try sending the “reload” command again.
By following the above steps, you should be able to resolve the warning message and successfully send the “reload” command to your React Native apps. It is important to ensure that you have a valid/supported simulator or a properly connected physical device before attempting to send the command.