Xamarin iOS app crash when start on iPad Air 2 with iOS 13.3.1

Question

I tried to start a Xamarin iOS app on iPad Air 2 with 13.3.1 as iOS

Partial log, I pasted full below via pastebin:

1   Incident Identifier: C8DA7CE0-06EF-4E08-A74A-60C8E455C3AA
    2   Beta Identifier:     FDF534D6-89BA-486F-988F-154845125DEB
    3   Hardware Model:      iPad5,3
    4   Process:             MyApp.Forms.iOS [1525]
    5   Path:                /private/var/containers/Bundle/Application/8D581BA0-F6EE-4F49-9AA8-239728A46E68/MyApp.Forms.iOS.app/MyApp.Forms.iOS
    6   Identifier:          com.MyApp.R17
    7   Version:             99 (17.2004.0)
    8   AppStoreTools:       11C29
    9   AppVariant:          1:iPad5,3:13
    10  Beta:                YES
    11  Code Type:           ARM-64 (Native)
    12  Role:                Foreground
    13  Parent Process:      launchd [1]
    14  Coalition:           com.MyApp.R17 [662]

Here is full log:

https://pastebin.com/jHsNYDdf

There is image how I build Xamarin iOS on Latest visual studio for Mac

I started without problem on emulator with same iPad type and same iOS version ...

The issue happens on physical iPad ...

Can tell me what's going wrong?

Answer 1

0 libsystem_kernel.dylib 0x00000001891bfec4 __pthread_kill + 8 1 libsystem_pthread.dylib 0x00000001890db1d8 pthread_kill$VARIANT$mp + 136 >(pthread.c:1458) 2 libsystem_c.dylib 0x000000018902f8c0 __abort + 112 (abort.c:147) 3 libsystem_c.dylib
0x000000018902f850 abort + 112 (abort.c:118)

Occuring this error in physical device , sometimes because not adding permissions in info.plist . Maybe it will not occurs error in a simulator , however it can be in a physical device .

For example : adding Photo and Camera permission in info.plist ,

<key>NSCameraUsageDescription</key>
<string>Use Camera</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>Use Photo</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>Use Photo addition</string>

Having a look at Accessing Private User Data to check your needed permissions .

Note :

Apps that fail to provide the required keys will be silently terminated by the system when they attempt to access one of the restricted features or user information, without error ! If an app starts unexpectedly failing on iOS 10, ensure that all of the required Info.plist have been specified.