1.创建项目：react-native init test

2.react-native run-ios 打开模拟器

3.react 调试

Install the react-devtools package globally:

with yarn:

yarn global add react-devtools

or with npm:

npm install -g react-devtools

Now run react-devtools from the terminal to launch the standalone DevTools app:

react-devtools

If you're not in a simulator then you also need to run the following in a command prompt:

adb reverse tcp:8097 tcp:8097

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好 放弃去考研了