pop up exception

[fifisamy]

      transitionContext.containerView.insertSubview(toViewController.view, at: 0)

I have an exception when popup form ViewController

[wickwirew]

Can you give some more information? Whats the exception you receive? What file? A code snippet to reproduce it would be helpful as well

[fifisamy]

file. name NavControllerTrasntitionDismissing.swift
error name "attempt to recover by breaking constraint"
with quickly close shift animated activity

the error show in this code :
using transitionContext: UIViewControllerContextTransitioning) {
guard let fromViewController = transitionContext.viewController(forKey: .from),
let toViewController = transitionContext.viewController(forKey: .to) else { return }

        // Here the error
    transitionContext.containerView.insertSubview(toViewController.view, at: 0)

[fifisamy]

file. name NavControllerTrasntitionDismissing.swift
error name "attempt to recover by breaking constraint"
with quickly close shift animated activity

the error show in this code :
using transitionContext: UIViewControllerContextTransitioning) {
guard let fromViewController = transitionContext.viewController(forKey: .from),
let toViewController = transitionContext.viewController(forKey: .to) else { return }

    // Here the error
transitionContext.containerView.insertSubview(toViewController.view, at: 0)