Where to put code that needs to be executed every time a Tableview (tab bar item) is selected

I would like to fill an array from a file every time one of my tableview's is selected开发者_C百科 in the tab bar.

I dont think putting the code in the viewDidLoad method works, because the view gets loaded on once?

Where should the code be placed?

Within the viewDidAppear method?

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Put it in viewWillAppear if you want the code to run before the view is displayed.

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You can conform to the UITabBarDelegate protocol and implement the following method:

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item

I suggest that you set the tag property in the creation of your UITabBarItems in order to differentiate between which tab the item is.