まだハードコードで消耗してるの？ ResourceKitで安全コーディング！ ref: https://qiita.com/bannzai/items/e9bf5904940fb1ed5082

file0.swift

// Get ViewController
let storyboard = UIStoryboard(name: "Storyboard", bundle: nil)
let viewController = storyboard.instantiateViewControllerWithIdentifier("XXXX") as! ViewController

// PerformSegue
performSegueWithIdentifier("Open", sender: sender)

// Nib
let nib = UINib(nibName: "TableViewCell", bundle: nil)
let cell = nib.instantiateWithOwner(nil, options: nil)[0] as! TableViewCell

file1.swift

// Get ViewController
let viewController = ViewController.instanceFromStoryboard()

// PerformSegue
performSegueOpen()

// Nib
let cell = TableViewCell.Xib().view()