How to debug a (freeze) bug showing only on --release build with iOS?

ionic-v1
1

Something breaks when I do a release build for iOS. Bug description: the app totally freezes for about 10 seconds after starting.

  • My app works as expected (no freezing) if I use “ionic cordova run ios” to run the app on my iOS device.
  • But when I download the same app from AppStore (or build with --release and upload it to TestFlight or use ios-deploy to run it) the bug appears.
  • The problem happens only with iOS.

My “ionic info” output:

cli packages:

@ionic/cli-utils  : 1.18.0
ionic (Ionic CLI) : 3.18.0

global packages:

cordova (Cordova CLI) : 7.1.0

local packages:

Cordova Platforms : android 6.4.0 ios 4.5.3
Ionic Framework   : ionic1 1.3.3

System:

ios-deploy : 1.9.2
ios-sim    : 5.0.13
Node       : v6.9.5
npm        : 3.10.10
OS         : macOS Sierra
Xcode      : Xcode 9.1 Build version 9B55

Do you have any suggestion on how to debug this situation? Or if you have any ideas what might cause this, please let me know.

2

http://rhult.github.io/articles/testing-release-builds/

3

Thanks! Correct me if I’m wrong but this setup probably does not let me to use Safari WebInspector though. Do you know if this is possible in any way with a --release build?