如何在Swift中解除模态显示的视图控制器后重新加载ViewController？ [英] How can you reload a ViewController after dismissing a modally presented view controller in Swift?

问题描述

我有一个第一个tableViewController，它在单击一个单元格时打开第二个tableViewcontroller。第二个视图控制器以模态方式显示（显示详细信息）并被解除：

I have a first tableViewController which opens up a second tableViewcontroller upon clicking a cell. The second view controller is presented modally (Show Detail segue) and is dismissed with:

self.dismissViewControllerAnimated(true, completion: {})

此时，第二个视图控制器滑开并显示其下方的第一个视图控制器。此时我想重新加载第一个视图控制器。我知道这可能需要使用委托功能，但我不知道如何继续。在此先感谢您的帮助！

At this point, the second view controller slides away and reveals the first view controller underneath it. At this point I would like to reload the first view controller. I understand that this may require use of delegate functions but am not sure how to proceed. Thanks in advance for your help!

推荐答案

我解决了它有点不同，因为我不希望这种依赖。

I solved it a bit differently since I don't want that dependancy.

当你以模态方式呈现控制器时，这种方法是有意的，因为呈现控制器在你解雇所呈现时不会重新加载。

And this approach is intended when you present a controller modally, since the presenting controller wont reload when you dismiss the presented.

无论如何解决方案！

而是你做一个单身人士（调解员）

Instead you make a Singleton (mediator)

protocol ModalTransitionListener {
    func popoverDismissed()
}

class ModalTransitionMediator {
    /* Singleton */
    class var instance: ModalTransitionMediator {
        struct Static {
            static let instance: ModalTransitionMediator = ModalTransitionMediator()
        }
        return Static.instance
    }

private var listener: ModalTransitionListener?

private init() {

}

func setListener(listener: ModalTransitionListener) {
    self.listener = listener
}

func sendPopoverDismissed(modelChanged: Bool) {
    listener?.popoverDismissed()
}
}

你有没有呈现控制器实现这样的协议：

Have you Presenting controller implement the protocol like this:

class PresentingController: ModalTransitionListener {
//other code
func viewDidLoad() {
    ModalTransitionMediator.instance.setListener(self)
}
//required delegate func
func popoverDismissed() {
    self.navigationController?.dismissViewControllerAnimated(true, completion: nil)
    yourTableViev.reloadData() (if you use tableview)
}
}

最后在viewDid / WillDisappear函数或自定义函数中的PresentedViewController中添加：

and finally in your PresentedViewController in your viewDid/WillDisappear func or custom func add:

ModalTransitionMediator.instance.sendPopoverDismissed(true)

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