将以模态形式呈现的视图控制器转移给其他基础视图控制器

Question

I have a UIViewController that's embedded in a Navigation View Controller. I then modally present another view controller that shows a countdown. Once the countdown ends, the modal view controller should be dismissed and show a different underlying view controller from the original presenting UIViewController.

Does anyone know how to do this in ios8 with Swift?

Answer 1

There are different ways to approach this. One way is to replace the initial presenting view controller with the desired underlying one when you present the modal view controller.

NSArray * viewControllers = [self.navigationController viewControllers];
[viewControllers replaceObjectAtIndex:viewControllers.count - 1 withObject:replacementController];

Dismissing the modal will simply show the different underlying view controller that was already swapped.

Answer 2

when you do popViewController from stack there is a handler. This will be called at the end of this function so you can pass a block where you can presentViewController or make change to the current one.