为什么 TestFlight 应用与本地开发不同？

Question

I have a React Native app with a custom native plugin.

The app works fine when I test it with Xcode on my device.

I uploaded the exact same app to the App Store and it got broken.

On my iPhone it doesn't actually start and on my iPad it is buggy:

• I have to tap buttons twice
• Code order is wrong (may threading / rendering)
• Events from the plugin sometimes get fired and sometimes not. Totally random. (could also be rendering issue)

Unfortunately, I can't debug the TestFlight App.

Does someone have a starting point why this could happen?

Answer 1

I found the problem. It was in my Plugin and how I expose it. My index.ts file looked like this:

import { NativeModules } from 'react-native';
const { MyPlugin } = NativeModules;
export default MyPlugin;

Better with no default export:

import { NativeModules } from 'react-native';
export const { MyPlugin } = NativeModules;

I don't know why a default export doesn't work in release mode. I tried all release flags to be the same as default, but it was the same result. So, just changing the way of export was fixing it.