Question

我将一个ViewController拖到我的故事板上，用一个popover segue塞进它，并在呈现VC的prepareForSegue中设置大小和样式。我的问题是，如果我的popover有几个按钮，他们的代码应该在哪里执行？

例如，我是否应该使用委托模式，在prepareForSegue中，我将委托引用作为self传递？然后委托后退？
或者，我应该为popover创建一个新的viewController，然后把代码放在那里运行？
我也读过this tutorial，有人说......

＆＃34;你可以使用它来掌握内容控制器 popoverPresentationController.presentedViewController方法中的 UIPopoverPresentationController

对我来说什么是理想的，因为我想要的代码会改变一些presentVC变量，将代表回到呈现的VC。

Answer 1

只需在prepareForSegue中设置popover按钮操作以指向presentationVC中的函数。

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if let dest = segue.destinationViewController as? MyPopoverViewController {
        let myButton = dest.view.viewWithTag(MY_BUTTON_TAG) as! UIButton
        myButton.addTarget(self, action: "onMyButton", forControlEvents: .TouchUpInside)
    }
}

func onMyButton() {
    ...
}

使用像这样的UIButton扩展的闭包甚至更好：

https://www.mikeash.com/pyblog/friday-qa-2015-12-25-swifty-targetaction.html

Answer 2

Ultimately just went with delegation in the competition block of the dismiss popover call:

class NavigationViewController: UIViewController {

    var presentingVC_Delegate: mainLists_PopoverDelegation!
    var whatToDo = "Placeholder"

    @IBOutlet var shareBtn: UIButton!
    @IBOutlet var clearBtn: UIButton!
    @IBOutlet var settingsBtn: UIButton!

    //***** ----- ***** ------ ***** ----- ***** ----- *****
    //Menu Button Functions
    //***** ----- ***** ------ ***** ----- ***** ----- *****
    @IBAction func shareBtn_Pressed(sender: AnyObject) {
        self.dismissViewControllerAnimated(true, completion: { finished in
            self.presentingVC_Delegate.call_ActivityVC()
        })
    }
    @IBAction func clearBtn_Pressed(sender: AnyObject) {
        self.dismissViewControllerAnimated(true, completion: { finished in
            self.presentingVC_Delegate.deleteList()
        })
    }
    @IBAction func settingsBtn_Pressed(sender: AnyObject) {
        self.dismissViewControllerAnimated(true, completion: { finished in
            self.presentingVC_Delegate.presentSettingsVC()
        })
    }
}

protocol mainLists_PopoverDelegation {
  func call_ActivityVC ()
  func deleteList ()
  func presentSettingsVC ()
}

With those three functions located in the main VC.

代表团出席VC，来自Popover

2 个答案: