So far, we’ve seen how to use the State property wrapper for values within a given view. We’ve also seen how to bind local values to external variables with Binding.
In both of those cases, our code needs to create and control the values. These values, via property wrappers, are then passed around. Using property wrappers in this way keeps the source of truth both isolated and always in sync.
But what about values that might be created somewhere else? What about values that might affect the whole app or device?
SwiftUI has solutions for that as well with Environment values and objects.
