Adding a bootstrapper on iOS

The Bootstrapper for iOS is a simple wrapper for the common bootstrapper defined in the .NET Standard library, but with the addition of an Init method that will be called at startup:

1. In the root of the iOS project, create a new class called Bootstrapper.cs.
2. Add the following code to it:

public class Bootstrapper : DoToo.Bootstrapper 
{
 public static void Init()
 {
 var instance = new Bootstrapper();
 }
} 

The Init method may look strange since we don't retain a reference to the instance we create. Keep in mind, however, that we do keep a reference to a Resolver instance inside the Resolver class, which is itself a singleton. 

The final step for iOS is to call this Init method in the right place:

1. Open up AppDelegate.cs.
2. Locate the FinishedLaunching method and add the code in bold:

public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
    global::Xamarin.Forms.Forms.Init();
    Bootstrapper.Init();
    LoadApplication(new App());
 
    return base.FinishedLaunching(app, options);
}