Xamarin ios : App breaks after splash screen

Question

In my xamarin forms project I run my xamarin ios part for the first time, but getting the following Exception:

Foundation.MonoTouchException has been thrown Objective-C exception thrown. Name: NSInternalInconsistencyException Reason: Unable to instantiate the UIApplication delegate instance. No class named AppDelegate is loaded.

Screenshot:

AppDelegate.cs

    using System;
    using System.Collections.Generic;
    using System.Linq;

    using Foundation;
    using UIKit;

    namespace Myapp.iOS
    {
        // The UIApplicationDelegate for the application. This class is responsible for launching the 
        // User Interface of the application, as well as listening (and optionally responding) to 
        // application events from iOS.
        [Register("AppDelegate")]
        public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
        {
            //
            // This method is invoked when the application has loaded and is ready to run. In this 
            // method you should instantiate the window, load the UI into it and then make the window
            // visible.
            //
            // You have 17 seconds to return from this method, or iOS will terminate your application.
            //
            public override bool FinishedLaunching(UIApplication app, NSDictionary options)
            {
                global::Xamarin.Forms.Forms.Init();
                LoadApplication(new App(""));

                return base.FinishedLaunching(app, options);
            }
        }
    }

Main.cs

    using System;
    using System.Collections.Generic;
    using System.Linq;

    using Foundation;
    using UIKit;

    namespace Myapp.iOS
    {
        public class Application
        {
            // This is the main entry point of the application.
            static void Main(string[] args)
            {
                // if you want to use a different Application Delegate class from "AppDelegate"
                // you can specify it here.
                UIApplication.Main(args, null, "AppDelegate");
            }
        }
    }

Thanks in advance

Possible duplicate of [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — , Feb 15 '18 at 14:51
In app.xaml.cs i am loading the mainpage, mainpage contains the login credentials — Sreejith Sree, Feb 15 '18 at 14:57
@GeraldVersluis I edit the question with the exception screenshot — Sreejith Sree, Feb 15 '18 at 15:01
The problem lies deeper. Your are calling a method somewhere which takes a parameter called `image` and you're putting a null value in there. From your screenshots I see a call to `FromPatternImage`? Also, try not to post errors as screenshots, posting the text makes it more searchable. — Gerald Versluis, Feb 15 '18 at 15:04
I am not using FromPatternImage() in my project and not passing any image as an argument. — Sreejith Sree, Feb 15 '18 at 15:19
@GeraldVersluis: Solve the system.argumentnullexception by setting the icon buildaction property to content, now getting a MonoTouchException. Question edited with AppDelegate.cs and Main.cs — Sreejith Sree, Feb 16 '18 at 07:14
@ColeXia-MSFT Attach the Main.cs and AppDelegate.cs in the question — Sreejith Sree, Feb 16 '18 at 07:53
@SreejithSree build action of image here should be set to BundleResource ,and we need App and Mainpage code in PCL not AppDelegate and Main — ColeX, Feb 16 '18 at 07:57
https://stackoverflow.com/questions/47402126/no-class-named-appdelegate-is-loaded may helps. — ColeX, Feb 16 '18 at 08:31

Sreejith Sree · Accepted Answer · 2018-02-19T03:54:23.400

0

I Solve this issue by setting the Build Action property of AppDelegate.cs to Combile

edited Feb 19 '18 at 03:54

answered Feb 17 '18 at 10:08

Sreejith Sree

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Xamarin ios : App breaks after splash screen

1 Answers1