swift - 将一些数据传回 Launcher View Controller

Question

我正在从主视图 Controller 调用 segue(sheet) 以打开第二个 View Controller 。我正在通过覆盖 prepareforsegue 函数将一些数据传递给新 View Controller

override func prepare(for segue: NSStoryboardSegue, sender: Any?) {
      if (segue.identifier == "segue") {
            //get a reference to the destination view controller
      let destinationVC:myview = segue.destinationController as! myview
            //set properties on the destination view controller
            destinationVC.fileArray=fileArray

        }
    }

我正在第二个 View Controller 上执行一些操作。一旦操作完成/最好在新 View Controller 关闭/处置时，我需要将此函数的结果传递给父/laucher View Controller 。

我怎样才能做到这一点？

Answer 1

当你返回运行函数时:

if let presenter = presentingViewController as? YourFirstController {
    presenter.fileArray = fileArray
}
dismiss(animated: true, completion: nil)