更改选项卡时以模态显示的ViewController消失

Question

I have a UITableViewController that presents a UIViewController modally when didSelectRowAt is invoked.

My application is wrapped in a UITabBarController .

I would like to dismiss the UIViewController when a user changes tabs.

I have tried to call dismiss on my controller like so, but this does not work.

let vc = VimeoController() 
....    

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        vc.dismiss(animated: true) {
            print("dismissed")
        }

    }
...
    fileprivate func presentModal() -> Void {
        vc.modalPresentationStyle = .overCurrentContext
        present(vc, animated: true, completion: nil)
    }

Answer 1

Place your dismiss call within the viewDidDisappear lifecycle hook of your VimeoController controller instead.

override func viewDidDisappear(_ animated: Bool) {
    super.viewDidDisappear(animated)
    dismiss(animated: true, completion: nil)
}