how do i call SetRootViewController from a view controller using swift?

Question

I am trying to use setRootViewController in swift from a UIViewController not from app delegate.

I found some questions on stack overflow but everywhere they have explained to do it from app delegate. However, I want to do it from a UIViewController and set UITabBarController as a rootViewController

This is how i did it in objective c

UITabBarController *main = [self.storyboard instantiateViewControllerWithIdentifier:@"main"];

[[[[UIApplication sharedApplication] delegate] window] setRootViewController:main];

I would like to do the same in swift. Is there any way to do it in swift or do i need to use segue?

Answer 1

我使用下面的代码行：

UIApplication.sharedApplication().delegate?.window??.rootViewController = mainViewController