XCODE : Using TabBar to view two same ViewControllers that show different filters on the datasource

I have a problem with my App for iPhone.

Enviroment: I have a TableView, that operates above an MutableArray datasource. An example would be Lap Times for Go cart pilots.

Datasource: I record lap times from both training sessions and from race and qualifying. I consider race + qualifying as one subset of data and training sessions as another subset of data because I think there is big psychological effect and my drivers have slower laps when racing because of fear of crashing into others. At this time I record both data in one array with a variable of Bool "fromRace". So I can filter racing and out of race times.

Human Interface: I created a TabBar that shows racing times in first Tab and training times in second Tab. It feels, like those Tabs contain basically the same view and operate on same data which I just filter using the same view controller since all the methods are the same.

Is it programatically correct to create two separate view co开发者_StackOverflow中文版ntrollers and two separate arrays for the datasource basically duplicating the code? Or try somehow to try to discover from which tab I came and alter the data presentation accordingly using just one view controller?

I hope I am clear on what I ask for.

Yes - broadly speaking, a UITabBar is used exclusively to switch between view controllers. That's how it's designed to operate - you load each 'slot' in the tab-bar up with a view controller.

That doesn't mean you have to create two separate view controllers - you could create two instances of the same view controller, and have some flag passed in upon initialisation that would display the data in a different way.

If you just wanted to have a single view controller adapt to display the data in different ways a UIToolBar would be a more appropriate UI element (perhaps with a segmented controller at the bottom).