Cannot display a custom UIVIew with React Native Unity 2018, works with 2017

I have a Unity project where I show custom UIViews built with React Native. Everything works great with Unity 2017. After I updated to Unity 2018, React Native cannot calculate a correct size of components. After days of debugging I couldn't find a reason why it is happening.

I build the same project with Unity 2017 and everything works. I switch to 2018 and it stops working. Based on what I see after debugging with XCode, React Native components cannot obtain the right bounds and and calculate wrong values for with and height. I compared all source files in Classes folder in the XCode project and I don't see any significant change that may lead to this.

This is how try to display a custom UIView

Code (CSharp):

1. UIWindow* unityWindow = UnityGetMainWindow();
2.  
3. CGRect frame = unityWindow.frame;
4. CGRect bounds = unityWindow.bounds;
5. reactRootView.frame = frame;
6. reactRootView.bounds = bounds;
7.  
8. [unityView removeFromSuperview];
9. [unityWindow addSubview:reactRootView];
10.  
11.  

If anyone has any clues or suggestions, I would really appreciate it.

 

The issue still remains, there is a detailed description and a sample project that reproduces it https://github.com/yurykorzun/unity-react-native-demo

It doesn't happen on Android or on iOS running on a Simulator

What was changed in the XCode project after Unity 2017 that could break it?

 

We solved this issue by adding React Native as a framework, not a static library.