Sending "devMenu" to all React Native apps failed. Make sure your app is running in the simulator or on a phone connected via USB. info Opening developer menu..

时间：2021-06-11 12:11:07 收藏：0 阅读：238

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. info Reloading app... 
warn No apps connected. Sending "devMenu" to all React Native apps failed. 
Make sure your app is running in the simulator or on a phone connected via USB. info Opening developer menu... N

1.我这个问题出现的原因一开始是因为的node安装的是12.19.1版本，然后经过确认需要安装12.9.1版本，所以我node重新安装了.

2.重新安装之后还是这个错误，然后我突然想起来我rn全局那个 React Native CLI是用12.19.1安装的，可能有问题，于是重新卸载和安装

npm uninstall react-native-cli
npm install -g react-native-cli //因为我安装教程安装的是全局的，所以要卸载掉重新安装，包括npm包

3.然后就搞定了，进入这个界面

技术分享图片

原文：https://www.cnblogs.com/shuen/p/14874206.html

Sending &quot;devMenu&quot; to all React Native apps failed. Make sure your app is running in the simulator or on a phone connected via USB. info Opening developer menu..

Sending "devMenu" to all React Native apps failed. Make sure your app is running in the simulator or on a phone connected via USB. info Opening developer menu..