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susieyy/PreviousViewController.swift

Created August 4, 2016 10:41
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Access previous view controller in navigation stack
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PreviousViewController.swift
extension UIViewController {
var previousViewController: UIViewController? {
guard let navigationController = navigationController else { return nil }
let count = navigationController.viewControllers.count
return count < 2 ? nil : navigationController.viewControllers[count - 2]
}
}
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