ios - 回到 UIViewController 不会触发 segue

Question

我有 Controller B，它使用委托(delegate)模式将数据发送回 Controller A，但由于某种原因我的 segue 没有触发。

是否有什么东西阻止我的 segue 被触发？我将如何解决这个问题？

Controller B - 模态呈现

@IBAction func addButton(_ sender: Any) {
        delegate?.select(sID: selectedID)
        dismiss(animated: true, completion: nil)
    }

Controller A

func select(sID: String) {
        performSegue(withIdentifier: "editSegue", sender: self);
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "editSegue" {
            if let destinationVC = segue.destination as? NewController {
                destinationVC.selectedQueryID = selectedQueryID;
                print(“test”);
            }
        }
        if segue.identifier == "selectSegue" {
            if let destinationVC = segue.destination as? ControllerB {
                destinationVC.queryID = selectedQueryID;
                destinationVC.delegate = self;
            }
        }
}

Controller C - 模态呈现(不呈现自身)

Answer 1

在B View Controller 中，dismiss完成时触发

@IBAction func addButton(_ sender: Any) {

    dismiss(animated: true, completion: {
         delegate?.select(sID: selectedID)
   }
}

还要确保您以模态方式呈现 B viewcontroller。