Data binding not working on iOS device xamarin forms

Om Singh Shergill 1

I am updating a Xamarin App it is working perfectly on Android devices, Android Simulator, and iOS simulator but Not working on iOS devices. I want to test it on the device before launching a new release on Appstore.

I am able to deploy on iOS devices.

The first issue I was facing was in NLogger returning System.NullReferenceException: 'Object reference not set to an instance of an object'

For Logging, I am following

https://martynnw.wordpress.com/2016/10/16/logging-with-nlog-in-xamarin-forms/

tried a lot to resolve the issue did not succeed. so I commented NLogger for Now and used Console.WriteLine("Error: " + ex.Message); just to track/see errors. Here I have raised a question about the NLogger issue.

https://stackoverflow.com/q/71025867/8287839

After commenting NLogger App worked it opened the landing (login) page. But data binding is not working whatever I am filling in the fields it's not being set to the model all parameters are empty. Image paths are Null, Constant variables are null. On the simulator data binding is working.

How can I resolve this? Do I need to change some kind of permissions or generate a certificate on developer.apple.com?

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 31,161 Reputation points Microsoft Vendor

2022-02-25T03:27:06.25+00:00

I check the first link and download the source code at GitHub, but it was five years ago, I couldn't run into my iOS simulator. May I ask what's the version of your VS and Xamarin.Forms? Since NLogger is a third-party tool, you could try to create a new issue at https://github.com/NLog/NLog/issues for help or connect owners at https://www.nuget.org/packages/NLog/4.7.14.
About data binding, would you mind sharing more code or sharing a demo with me? You could upload it to GitHub and attach the link here. It's helpful for investigating the issue.
Om Singh Shergill 1 Reputation point

2022-02-25T15:38:55.687+00:00

and my Xamarin.Forms version is 5.0.0.2337
Here i have upload some relative files. https://github.com/omshergill/MobileApp

and my dependencies are
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 31,161 Reputation points Microsoft Vendor

2022-02-28T03:12:31.417+00:00
After commenting NLogger App worked it opened the landing (login) page. But data binding is not working whatever I am filling in the fields it's not being set to the model all parameters are empty. Image paths are Null, Constant variables are null. On the simulator data binding is working.

I check your code at GitHub and add the code into my demo, but the code is not detail enough. The following image paths are both reference from static member, the CheckboxImageView and BindableSkiaImage are custom controls, would you mind sharing more information? And check if these paths are null in your real device.

Image="{Binding Source={x:Static constants:ImageSources.Logo}}" TrueImage="{Binding Source={x:Static constants:ImageSources.CheckedTrue_White},Converter={converters:SkiaConstantsConverter}}" FalseImage="{Binding Source={x:Static constants:ImageSources.CheckedFalse_White},Converter={converters:SkiaConstantsConverter}}"
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 31,161 Reputation points Microsoft Vendor

2022-02-28T07:21:10.933+00:00

You could try to upgrade to VS2022 for testing.

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