In my application, I'm using this instead of $scope to save variables and functions, and using controller alias in the HTML to access.
In this case, how to can I update my view, do something like $digest() or $apply() of $scope?
Or is necessary inject $scope to do this?
The controllerAs way have nothing to do with $scope in the controller. It's a pattern to avoid contact between $scope and the template and also improve readability. However, even though you are using controllerAs syntax, you can inject $scope on your controller with no problems. That's what controllerAs is about, use the $scope for propper tasks such as $scope.$apply, but not as a view model.
It's not a bad practice injecting the $scope even though you're using controllerAs. But it would be a bad practice if you use $scope to work like a view model. Anyhow, even if you don't inject, $scope will exists somehow in the controller internals, it's part of a controller. The aproach of controllerAs is to separate the role of view model from the $scope. In the end the view model become a part of the scope but it's isolated from the rest of $scope's features.
$scope just for update my view, in this case?
$scope even though you're using controllerAs. But it would be a bad practice if you use $scope to work like a view model.@Lai32290 Good job adopting the controllerAs convention! It saves on headaches and makes things much clearer with nested scopes! As for your question, you cannot avoid the use of $scope for the purposes of calling $digest or $apply. Remember though that behind the scenes, angularjs still attaches your controllerAs to the $scope, so it's still there.
You'll need to use it when events occur outside of angular's lifecycle - such as with sockets or events from other external libaries.
http://www.codelord.net/2015/11/11/angular-controlleras-when-should-you-use-scope/
$scope? It's used for data binding between the view and the controller.thishas nothing to do with saving variables and functions. Would be same number of variables if you used$scope$scopespecifically, just trying fallow the @john_papa style guide (github.com/johnpapa/angular-styleguide/blob/master/a1/…)controllerAs... don't need to inject it for all controllers$digest()or$apply()?" The need to use those should be very rare.