CODEWITHSUNDEEP
iosuitabbarcontroller
Simankov
Simankov

Reputation: 91

What purpose of setViewControllers in the case

I saw this lines in project, that I need to understand. 

let mainControllers = self.storyboard!.instantiateViewControllerWithIdentifier("TabNavigation") as! UITabBarController
let controllers = Array(mainController.viewControllers![0..<3])
mainController.setViewControllers(controllers, animated: false)
self.presentViewController(mainController, animated: true, completion: nil)

What is the benefit of resetting view controllers? Thanks

Upvotes: 0

Views: 56

Answers (1)

rmaddy
rmaddy

Reputation: 318824

The code is limiting mainController to only the first 3 view controllers originally defined in the storyboard.

This code:

mainController.viewControllers![0..<3]

returns the first three elements of the original array. Then the (possibly) smaller array is used to reset the view controllers of mainController.

Upvotes: 1

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