Load All TabBar Views

Question

I have a tabbar controller as the root view controller. I would like to pre-load the views of tab [1,2,3] (tab 0 loads as the first tab automatically).

I essentially

Answer 1

In iOS 8, I created a subclass of UITabViewController named TSMainBarViewController. In the function viewDidLoad of TSMainBarViewController, I just added this code:

for(UINavigationController * viewController in self.viewControllers){
    [[viewController.viewControllers firstObject] view];
}

Then all the viewControllers (root viewController of UINavigationController) will load . All my viewControllers are created in the StoryBoard. Do not implement the function loadView in the UIViewController.

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Swift 3 code from EligyD:

for viewController in self.viewControllers! {
    _ = viewController.view
}