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Editorial Team
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Asked: 2026-06-03T23:22:06+00:00

I have a mutable array of values used in a tableviewcontroller, a mapviewcontroller, and

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I have a mutable array of values used in a tableviewcontroller, a mapviewcontroller, and the callingviewcontroller. I have been updating them all, ie. 

[dataArray addObject:object atIndex:0];
[tvc. dataArray addObject:object atIndex:0];
[mvc. dataArray addObject:object atIndex:0];

Is there a way of declaring dataArray in the table and map viewcontrollers that would make them pointers to the dataArray in the callingViewController? So I would just have to update one?

***Okay guys, I made a really stupid mistake here. At some point I changed the initialization and passed nil as the dataArray, and for some reason I had an “if (!dataArray) create new” clause to hide it from myself.

Kaan is correct.
[dataArray addObject:object atIndex:0];
is all that is needed.

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1 Answer

  1. Editorial Team

    After your comment:

    How about you declare a property called dataArray in both your tableView and mapView and also callingView. Then, in your callingViewController, you initialize a mutable array called lets say myFirstArray and do: 

    NSMutableArray *myFirstArray = [NSMutableArray array];
self.dataArray = myFirstArray;
myTableView.dataArray = myFirstArray;
myMapView.dataArray = myFirstArray;

    This way they will both be pointing to the same object and change you do in one will reflect in the other. Give it a try!

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