ios - UIPopoverController popoverControllerDidDismissPopover 不起作用

Question

我正在 iPad 上通过 uibutton 展示弹出 Controller 。我将 UIPopoverController 的委托(delegate)设置为主视图 Controller 。 “popoverControllerShouldDismissPopover”和“popoverControllerDidDismissPopover”都没有被调用。我错过了什么吗？

class MainVC: UIViewController,UIPopoverControllerDelegate

@IBAction func btnTPD(sender: UIButton) {

    var vc = MyXIB(nibName: "MyXIB",bundle: nil)

    var nav = UINavigationController(rootViewController: vc)

    var popover = UIPopoverController(contentViewController: nav)
    popover.delegate = self
    popover.popoverContentSize = CGSize(width: 283, height: view.bounds.height * 0.6)
    popover.presentPopoverFromRect(sender.frame, inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: false)

}

func popoverControllerShouldDismissPopover(popoverController: UIPopoverController) -> Bool {

    println("SHOULD DISMISS")

    return true

}

func popoverControllerDidDismissPopover(popoverController: UIPopoverController) {

    println("DID DISMISS")

}

Answer 1

看来我的 UIPopoverController 实例(var popover)需要在“btnTPD”函数之外声明才能使委托(delegate)函数正常工作。

class MainVC: UIViewController,UIPopoverControllerDelegate {

var popover: UIPopoverController!

@IBAction func tapped(sender: UIButton) {

    var vc = MyXIB(nibName: "MyXIB",bundle: nil)

    var nav = UINavigationController(rootViewController: vc)

    popover = UIPopoverController(contentViewController: nav)
    popover.delegate = self
    popover.popoverContentSize = CGSize(width: 283, height: view.bounds.height * 0.6)
    popover.presentPopoverFromRect(sender.frame, inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: false)

}

func popoverControllerShouldDismissPopover(popoverController: UIPopoverController) -> Bool {

    println("SHOULD DISMISS")

    return true

}

func popoverControllerDidDismissPopover(popoverController: UIPopoverController) {

    println("DID DISMISS")

}

}