public async Task NavigateTo(string screenName, object param = null)
{
if (_currentScreen?.ScreenName == screenName || _inLoadingScreenName == screenName)
{
return;
}
_inLoadingScreenName = screenName;
var viewModelType = _mapper.GetViewModelType(screenName);
if (viewModelType == null)
{
_logger.LogError($"no screen view model found for {screenName}");
Relogin();
return;
}
if (_currentScreen != null)
{
await _router.HideScreen();
}
_scopeManager.OpenScope(screenName);
var nextScreen = (ScreenViewModelBase)_scopeManager.Resolve(viewModelType, IfUnresolved.Throw);
try
{
await((IViewModel)nextScreen).InitializeAsync(param);
if (_currentScreen != null)
{
await _currentScreen.OnNavigatingFrom();
_currentScreen.Dispose();
}
_currentScreen = nextScreen;
await _router.PrepareScreen(nextScreen);
_inLoadingScreenName = null;
await _currentScreen.OnNavigatedTo();
}
catch (Exception e)
{
_logger.LogError($"NavigationService: {viewModelType.Name} InitializeAsync failed with exception: {e}");
nextScreen.Dispose();
await _router.UnHideScreen();
throw;
}
}