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From yesterday I started getting this issue in iOS emulator:
When I hit cmd+D in iOS emulator to bring up development menu, App becomes unresponsive for ~30 sec. Then when I select something (Debug in chrome for example). Menu is gone, but app is unresponsive for another 30 sec or so.
This happens with apps that are just created:
react-native init testapp
In android emulator it works just fine.
Video sample (I am trying to click on menu item and then on count button every second or so): https://www.youtube.com/watch?v=O7YIGeQK9lk
Code here: https://github.com/juozapas/reactsampleapp
$ react-native --version
react-native-cli: 0.1.10
react-native: 0.19.0
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killing the application from memory - after starting the application it works again (just by closing where the application is running in the background and starting it from there doesn't help) reinstalling the application ( react-native run-android ) - works again.
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Looking at your video, it seems that you have enabled the Slow animations debugging mode in the iOS Simulator, perhaps by accidentally pressing Cmd + T.
Try turning off the slowed animations under the Debug > Slow Animations menu or by pressing Cmd + T again.
I am not sure of the root cause of the unresponsiveness, but it is perhaps due to the native Action Sheet component animating out on the button press before the control is returned to the application.
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