iOS 8 iPhone上的UIPopoverPresentationController

时间：2014-08-14 23:31:58

标签： objective-c iphone uipopovercontroller ios8 uipopover

是否有人知道UIPopoverPresentationController是否可用于在iPhone上展示弹出窗口？想知道Apple是否在iOS 8上添加了此功能，试图为iPad和iPhone创建更统一的演示控制器。

不确定是否可以向Beta提问/回答问题。在那种情况下我会删除它。

8 个答案:

答案 0 :(得分：82)

您可以使用以下方式覆盖紧凑水平环境（即iPhone）中的默认自适应行为（UIModalPresentationFullScreen 通过adaptivePresentationStyleForPresentationController:提供的UIPopoverPresentationController.delegate方法。

UIPresentationController使用此方法询问要使用的新演示文稿样式，在您的情况下，只需返回UIModalPresentationNone即可使UIPopoverPresentationController呈现为弹出框而不是全屏。< / p>

以下是使用故事板中的segue设置的弹出窗口示例，从UIBarButtonItem到“目前模态”a UIViewController 

class SomeViewController: UIViewController, UIPopoverPresentationControllerDelegate {

    // override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) { // swift < 3.0
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "PopoverSegue" {
            if let controller = segue.destinationViewController as? UIViewController {
                controller.popoverPresentationController.delegate = self
                controller.preferredContentSize = CGSize(width: 320, height: 186)                
            }
        }
    }

    // MARK: UIPopoverPresentationControllerDelegate

    //func adaptivePresentationStyleForPresentationController(controller: UIPresentationController!) -> UIModalPresentationStyle { // swift < 3.0
    func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
        // Return no adaptive presentation style, use default presentation behaviour
        return .None
    }
}

WWDC 2014 session 214 "View Controller Advancement in iOS8"（36:30）

中提到了这个伎俩

答案 1 :(得分：73)

如果有人想要仅使用代码提供popover，您可以使用以下方法。

目标 - C

声明属性UIPopoverPresentationController：

@property(nonatomic,retain)UIPopoverPresentationController *dateTimePopover8;

使用以下方法显示UIButton的弹出窗口：

- (IBAction)btnSelectDatePressed:(id)sender
{
    UINavigationController *destNav = [[UINavigationController alloc] initWithRootViewController:dateVC];/*Here dateVC is controller you want to show in popover*/
    dateVC.preferredContentSize = CGSizeMake(280,200);
    destNav.modalPresentationStyle = UIModalPresentationPopover;
    _dateTimePopover8 = destNav.popoverPresentationController;
    _dateTimePopover8.delegate = self;
    _dateTimePopover8.sourceView = self.view;
    _dateTimePopover8.sourceRect = sender.frame;
    destNav.navigationBarHidden = YES;
    [self presentViewController:destNav animated:YES completion:nil];
}

使用以下方法显示UIBarButtonItem的弹出窗口：

- (IBAction)btnSelectDatePressed:(id)sender
{
    UINavigationController *destNav = [[UINavigationController alloc] initWithRootViewController:dateVC];/*Here dateVC is controller you want to show in popover*/
    dateVC.preferredContentSize = CGSizeMake(280,200);
    destNav.modalPresentationStyle = UIModalPresentationPopover;
    _dateTimePopover8 = destNav.popoverPresentationController;
    _dateTimePopover8.delegate = self;
    _dateTimePopover8.sourceView = self.view;
     CGRect frame = [[sender valueForKey:@"view"] frame];
    frame.origin.y = frame.origin.y+20;
    _dateTimePopover8.sourceRect = frame;
    destNav.navigationBarHidden = YES;
    [self presentViewController:destNav animated:YES completion:nil];
}

在视图控制器中也实现此委托方法：

- (UIModalPresentationStyle) adaptivePresentationStyleForPresentationController: (UIPresentationController * ) controller {
    return UIModalPresentationNone;
}

要关闭此弹出窗口，只需关闭视图控制器即可。以下是关闭视图控制器的代码：

-(void)hideIOS8PopOver
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

<强> SWIFT

使用以下方法显示UIButon的弹出窗口：

func filterBooks(sender: UIButon)
    {
        let filterVC =  FilterDistanceViewController(nibName: "FilterDistanceViewController", bundle: nil)
        var filterDistanceViewController = UINavigationController(rootViewController: filterVC)
        filterDistanceViewController.preferredContentSize = CGSizeMake(300, 205)
        let popoverPresentationViewController = filterDistanceViewController.popoverPresentationController
        popoverPresentationViewController?.permittedArrowDirections = .Any
        popoverPresentationViewController?.delegate = self
        popoverPresentationController?.barButtonItem = self.navigationItem.rightBarButtonItem
        popoverPresentationViewController!.sourceView = self.view;
        popoverPresentationViewController!.sourceRect = sender.frame

        filterDistanceViewController.modalPresentationStyle = UIModalPresentationStyle.Popover
        filterDistanceViewController.navigationBarHidden = true
        self.presentViewController(filterDistanceViewController, animated: true, completion: nil)
    }

使用以下方法显示UIBarButtonItem的弹出窗口：

func filterBooks(sender: UIBarButtonItem)
    {
        let filterVC =  FilterDistanceViewController(nibName: "FilterDistanceViewController", bundle: nil)
        var filterDistanceViewController = UINavigationController(rootViewController: filterVC)
        filterDistanceViewController.preferredContentSize = CGSizeMake(300, 205)
        let popoverPresentationViewController = filterDistanceViewController.popoverPresentationController
        popoverPresentationViewController?.permittedArrowDirections = .Any
        popoverPresentationViewController?.delegate = self
        popoverPresentationController?.barButtonItem = self.navigationItem.rightBarButtonItem
        popoverPresentationViewController!.sourceView = self.view;
        var frame:CGRect = sender.valueForKey("view")!.frame
        frame.origin.y = frame.origin.y+20
        popoverPresentationViewController!.sourceRect = frame

        filterDistanceViewController.modalPresentationStyle = UIModalPresentationStyle.Popover
        filterDistanceViewController.navigationBarHidden = true
        self.presentViewController(filterDistanceViewController, animated: true, completion: nil)
    }

在视图控制器中也实现此委托方法：

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

请务必在.h / .m / .swift文件中添加委托UIPopoverPresentationControllerDelegate

答案 2 :(得分：10)

问题： iPhone popover显示全屏，不尊重preferredContentSize值。

解决方案：与Apple在UIPopoverPresentationController类引用中的建议相反，在获取对popover表示控制器的引用并进行配置后显示视图控制器。

// Get the popover presentation controller and configure it.
//...

// Present the view controller using the popover style.
[self presentViewController:myPopoverViewController animated: YES completion: nil];

答案 3 :(得分：2)

我找到了一些解决方法。

在Xcode6.1上，使用presentationController.delegate代替popoverPresentationController.delegate。

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier compare:@"showPopOver"] == NSOrderedSame) {
        UINavigationController * nvc = segue.destinationViewController;
        UIPresentationController * pc = nvc.presentationController;
        pc.delegate = self;
    }
}

#pragma mark == UIPopoverPresentationControllerDelegate ==
- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller
{
    return UIModalPresentationNone;
}

在WWDC 2014“iOS8中的View Controller Advancements”中，下面的代码可以在iPhone上显示popover。 

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{

    UINavigationController * nvc = segue.destinationViewController;
    UIPopoverPresentationController * pvc = nvc.popoverPresentationController;
    pvc.delegate = self;
}

#pragma mark == UIPopoverPresentationControllerDelegate ==
- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller
{
    return UIModalPresentationNone;
}

但是在Xcode 6.1上，这些代码显示了FullScreen演示...... （nvc.popoverPresentationController是零）

我怀疑它可能是Apple的错误。

答案 4 :(得分：2)

确保实施UIAdaptivePresentationControllerDelegate

像这样：

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {
    return UIModalPresentationNone;
}

如果你不想要全屏弹出窗口

答案 5 :(得分：1)

在iOS 8.3及更高版本中，使用UIPopoverPresentationControllerDelegate协议中的以下语法覆盖弹出式窗口UIModalPresentationStyle。 

func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
    return .none
}

答案 6 :(得分：0)

在WEBVIEW类中添加这两个方法。并添加

-(void) prepareForSegue: (UIStoryboardSegue * ) segue sender: (id) sender {
    // Assuming you've hooked this all up in a Storyboard with a popover presentation style
    if ([segue.identifier isEqualToString: @"showPopover"]) {
        UINavigationController * destNav = segue.destinationViewController;
        pop = destNav.viewControllers.firstObject;
        // This is the important part
        UIPopoverPresentationController * popPC = destNav.popoverPresentationController;
        popPC.delegate = self;
    }
}

- (UIModalPresentationStyle) adaptivePresentationStyleForPresentationController: (UIPresentationController * ) controller {
    return UIModalPresentationNone;
}

答案 7 :(得分：0)

您可以像这样扩展UIPopoverPresentationControllerDelegate：

protocol PopoverPresentationSourceView {}
extension UIBarButtonItem : PopoverPresentationSourceView {}
extension UIView : PopoverPresentationSourceView {}

extension UIPopoverPresentationControllerDelegate where Self : UIViewController {
   func present(popover: UIViewController, 
        from sourceView: PopoverPresentationSourceView, 
        size: CGSize, arrowDirection: UIPopoverArrowDirection) {

      popover.modalPresentationStyle = .popover
      popover.preferredContentSize = size
      let popoverController = popover.popoverPresentationController
      popoverController?.delegate = self
      if let aView = sourceView as? UIView {
          popoverController?.sourceView = aView
          popoverController?.sourceRect = CGRect(x: aView.bounds.midX, y: aView.bounds.midY, width: 0, height: 0)
      } else if let barButtonItem = sourceView as? UIBarButtonItem {
          popoverController?.barButtonItem = barButtonItem
      }
      popoverController?.permittedArrowDirections = arrowDirection
      present(popover, animated: true, completion: nil)
   }
}

您现在可以从实现present(popover: from: size: arrowDirection: )的任何视图控制器中调用UIPopoverPresentationControllerDelegate。

class YourViewController : UIViewController {
    @IBAction func someButtonPressed(_ sender: UIButton) {
        let popover = SomeViewController()
        present(popover: popover, from: sender, size: CGSize(width: 280, height: 400), arrowDirection: .right)
    }
}

extension YourViewController : UIPopoverPresentationControllerDelegate {
    func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
        return .none
    }
}
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