The Root Navigation Controller can serve as a data model. Each View Controller connected to the Navigation Controller via push segue can access its properties like so:
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((MyNavController *)self.parentViewController).mySourceProperty |
Here’s an example. MyNavController is the class for the Navigation Controller. This snipped is called from any View Controller in sequence and assumes we have an integer myNumber which is increased by one:
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((MyNavController *)self.parentViewController).myNumber++; |
The same principle works for Tab Bar Controllers too.