Send array from 1 view controller to 2 other separate view controllers

Question

I have an array in one view controller that I want to send to two other view controllers - i am doing it via a prepareForSegue: var userId = "" override func prepare(for segue: UIStoryboardSegue, sender: Any?) { let FollowersUsersViewController = segue.destination as! FollowersUsersViewController FollowersUsersViewController.followersUserId = userId let FollowingUsersViewController = segue.destination as! FollowingUsersViewController FollowingUsersViewController.followingUserId = userId } For the other 2 view controllers I am calling the array like so: View controller 1: var followersUserId = String() let followersProfileId = followersUserId View controller 2: var followingUserId = String() let followingProfileId = followingUserId It seems to work when i send it to one of the view controllers (and comment out the other) but then only one of the buttons work when i run the app. When I do it for both view controllers (as above) i get a Thread 1: signal SIGABRT error - how can it work for both? Appreciate any help :) JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

This is crashing because you are trying to cast wrong view controller. Thats is in a single iteration the segue.destination either FollowersUsersViewController or FollowingUsersViewController. You have conditionally cast it before use. Try this code override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if let controller = segue.destination as? FollowersUsersViewController { controller.followingUserId = userId } else if let controller = segue.destination as? FollowingUsersViewController { controller.followingUserId = userId } }