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I am attempting to implement a lifecycle impact in Xamarin.Varieties, however am having hassle for the iOS model. For some cause, I can not seem to observe the window altering notification occasion. Under is my code:
public class CustomLifeCycleEffectRouter : PlatformEffect
{
personal const NSKeyValueObservingOptions ObservingOptions = NSKeyValueObservingOptions.Preliminary | NSKeyValueObservingOptions.New;
UIView? _nativeView;
CustomLifeCycleEffect? _lifeCycleEffect;
IDisposable _isLoadedObserverDisposable;
protected override void OnAttached()
{
_lifeCycleEffect = Ingredient.Results.OfType<CustomLifeCycleEffect>().FirstOrDefault() ?? throw new ArgumentNullException($"The impact {nameof(CustomLifeCycleEffect)} cannot be null.");
_nativeView = Management ?? Container;
_isLoadedObserverDisposable = _nativeView?.AddObserver("window", ObservingOptions, isWindowAttachedObserver);
}
protected override void OnDetached()
{
_lifeCycleEffect?.RaiseUnloadedEvent(Ingredient);
_isLoadedObserverDisposable.Dispose();
}
personal void isWindowAttachedObserver(NSObservedChange nsObservedChange)
{
if (_nativeView.Window != null)
_lifeCycleEffect?.RaiseLoadedEvent(Ingredient);
else
_lifeCycleEffect?.RaiseUnloadedEvent(Ingredient);
}
}
I’m properly conscious that the Xamarin.Neighborhood Toolkit has an analogous impact, but it surely fires the occasion to early; I want it to fireside after I can navigate up the hiearchy to the foundation mum or dad. Can anyone see an issue?
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