ios - App Crashes Only On Testflight Build

Question

I have created an app on swift and tested it extensively using iPhone 6, iPhone 6 plus and iPhone 5 devices and all the simulators offered in Xcode. The app runs fine and does not crash when uploaded locally. (iOS 8)

I finally submitted a build for Testflight. The app consistently crashes at the same place after downloading the app through the Testflight build.

Is there a known issue where uploaded builds run differently than locally created builds? And how can I debug the issue with the Testflight build?

Answer 1

I guess its a swift compiler issue. To verify first go to Edit Scheme then change the Build configuration to Release mode in Run tab and then install the build locally. You will get to know where exactly its crashing.