UIPopoverController,Xcode 6,IOS 8使用Swift

Question

我在使用swift显示UIPopover时遇到了一些麻烦.注释掉的代码在Objective-C中工作正常,但使用Swift不起作用.当我点击我的视图控制器中的+时,我在调试器中得到了"click",但是没有弹出窗口.

class PlayerInformationTableViewController: UITableViewController, NSFetchedResultsControllerDelegate, UIPopoverControllerDelegate {

    @IBOutlet weak var addBarButtonItem: UIBarButtonItem!

    var playerInformationViewController = PlayerInformationViewController()
    var popover:UIPopoverController?    = nil

    override func viewDidLoad() {
        super.viewDidLoad()

        /*

        //setup the popover
        _cuesPopoverViewController          = [self.storyboard instantiateViewControllerWithIdentifier:@"CuesPopoverViewController"];
        self.cuesPopover                    = [[UIPopoverController alloc] initWithContentViewController:_cuesPopoverViewController];
        self.cuesPopover.popoverContentSize = CGSizeMake(540, 300);
        self.cuesPopover.delegate           = self;

        */

    playerInformationViewController.storyboard?.instantiateViewControllerWithIdentifier("PlayerInformationViewController")
    popover?.contentViewController = playerInformationViewController
    popover?.popoverContentSize = CGSizeMake(300, 300)
    popover?.delegate = self


        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = false

        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        // self.navigationItem.rightBarButtonItem = self.editButtonItem()
    }

@IBAction func addPopover(sender: AnyObject) {

    println("Click")

    popover?.presentPopoverFromBarButtonItem(addBarButtonItem, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: true)

}

解

  override func viewDidLoad() {
        super.viewDidLoad()

     }

@IBAction func addPopover(sender: AnyObject) {

    var popoverViewController = self.storyboard?.instantiateViewControllerWithIdentifier("PlayerInformationViewController") as UIViewController
    popoverViewController.modalPresentationStyle = .Popover
    popoverViewController.preferredContentSize   = CGSizeMake(450, 450)

    let popoverPresentationViewController = popoverViewController.popoverPresentationController

    popoverPresentationViewController?.permittedArrowDirections = .Any
    popoverPresentationViewController?.delegate = self
    popoverPresentationViewController?.barButtonItem = sender as UIBarButtonItem

    presentViewController(popoverViewController, animated: true, completion: nil)

}

Answer 1

这是iOS 8的简单示例.在iOS 8中使用adaptivity apis呈现Popover.

class PlayerInformationTableViewController: UITableViewController, UIPopoverPresentationControllerDelegate, NSFetchedResultsControllerDelegate{

   ...


  @IBAction func addPopover(sender: UIBarButtonItem){
    let playerInformationViewController =  PlayerInformationViewController()
    playerInformationViewController.modalPresentationStyle = .Popover
    playerInformationViewController.preferredContentSize = CGSizeMake(300, 300)



    let popoverPresentationViewController = playerInformationViewController.popoverPresentationController
    popoverPresentationViewController?.permittedArrowDirections = .Any
    popoverPresentationViewController?.delegate = self
    popoverPresentationController?.barButtonItem = sender
    presentViewController(playerInformationViewController, animated: true, completion: nil)
  }


  func adaptivePresentationStyleForPresentationController(controller: UIPresentationController!) -> UIModalPresentationStyle{
    return .None
  }

}