iPhone 上的 UIPopoverPresentationController 不产生弹出框

Question

我正在尝试在我的 iPhone 应用程序中实施新的 UIPopoverPresentationController（使用 Objective C）。我想要的是一个简单的弹出窗口，带有一个从启动按钮发出的表格视图。

--编辑--

这是我的 REVISED 代码，改编自文档中的研究，SO，以及以下评论中的输入：

- (IBAction)selectCategoryBtn:(UIButton *)sender
{
    [self performSegueWithIdentifier:@"CatSelectSegue" sender:self.selCatButton];
}

-(void) prepareForSegue:(UIStoryboardSegue *) segue Sender:(id) sender
{
    if (sender == self.selCatButton)
    {
        if ([segue.identifier isEqualToString:@"CatSelectSegue"])
        {
            UIPopoverPresentationController *controller = segue.destinationViewController;
            controller.delegate = self;
            controller.sourceView = self.selCatButton;
            controller.sourceRect = self.selCatButton.frame;
        }
    }
}


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

这是我的故事板联播：

然而，这只是以模态方式呈现一个表格视图，从底部上升并占用整个屏幕。

我已经在谷歌上搜索过，并仔细查看了 SO，但看来我并不是唯一一个对我希望解决 iPhone 的棘手问题感到困惑的人。

任何人都可以看到我的代码中的错误或指导我查看清晰的教程吗？我看过了，但也许 API 太新了，还没有人了解它。

谢谢！

第二次编辑：

以下是上述代码的结果。我减小了 View Controller 中 tableview 的大小，我希望它以弹出窗口的形式呈现。我将背景涂成灰色，只是为了阐明显示的内容而不是弹出框。

Answer 1

步骤：

A) Link 使用 Present As Popover segue 类型将您的 UIButton 连接到弹出窗口的视图控制器。实际上，我必须创建一个新项目才能显示它，但这可能与基本 SDK 有关。

B) 使包含 UIButton 的视图控制器符合 <UIPopoverPresentationControllerDelegate>。例如。在您的 MyViewController.m 文件中添加：

@interface MyViewController () <UIPopoverPresentationControllerDelegate>

C) 将下面的方法添加到包含 UIButton:

的视图控制器

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {

    return UIModalPresentationNone;
}

D) 将以下内容添加到您的 prepareForSegue:sender: 中替换您的 segue.identifier 检查：

if ([segue.identifier isEqualToString:@"CatSelectSegue"]) {
    UIViewController *dvc = segue.destinationViewController;
    UIPopoverPresentationController *controller = dvc.popoverPresentationController;
    if (controller) {
        controller.delegate = self;
    }
}

代码测试并证明其有效：

编辑：我的测试应用程序 TPOPViewController.m 魔法发生的文件：

#import "TPOPViewController.h"

@interface TPOPViewController () <UIPopoverPresentationControllerDelegate>//, UIAdaptivePresentationControllerDelegate>

@end

@implementation TPOPViewController

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

    NSString *identifier = segue.identifier;
    if ([identifier isEqualToString:@"popover"]) {
        UIViewController *dvc = segue.destinationViewController;
        UIPopoverPresentationController *ppc = dvc.popoverPresentationController;
        if (ppc) {
            if ([sender isKindOfClass:[UIButton class]]) { // Assumes the popover is being triggered by a UIButton
                ppc.sourceView = (UIButton *)sender;
                ppc.sourceRect = [(UIButton *)sender bounds];
            }
            ppc.delegate = self;
        }
    }
}

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {

    return UIModalPresentationNone;
}

@end

我的测试故事板也是：

Answer 2

显然上述方法不再适用于 iOS9/Xcode7。这是因为如果您使用 Interface Builder 将 segue 样式设置为 "Popover"，Xcode 在编译您的应用程序时会忽略它。此外，它会在您下次打开项目时自动将 segue 设置回 "Push"。如果您有像 Git 这样的版本控制软件，您将能够观察到正在进行的这种不需要的更改。

但是，如果您手动显示您想要显示为弹出窗口。示例 Swift 代码：

//  ViewController.swift
//  PopoverDemo
//
//  Created by bhnascar on 12/2/15.
//  Copyright © 2015 bhnascar. All rights reserved.
//

import UIKit

class ViewController: UIViewController, UIPopoverPresentationControllerDelegate {

    /* The bar button item that will present the popover. */
    var popoverButton: UIBarButtonItem?

    override func viewDidLoad() {
        super.viewDidLoad()
        popoverButton = UIBarButtonItem(title: "Pop!", style: UIBarButtonItemStyle.Plain, target: self, action: "presentPopover")
        self.navigationItem.rightBarButtonItem = popoverButton
    }

    // Mark: - UIPopoverPresentationControllerDelegate

    func prepareForPopoverPresentation(popoverPresentationController: UIPopoverPresentationController) {
        popoverPresentationController.permittedArrowDirections = .any
        popoverPresentationController.barButtonItem = popoverButton
    }

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

    // Mark: - Callback function for popover button.

    func presentPopover() {
        let popoverContentController = UIViewController()
        popoverContentController.view.backgroundColor = .blue

        // Set your popover size.
        popoverContentController.preferredContentSize = CGSize(width: 300, height: 300)

        // Set the presentation style to modal so that the above methods get called.
        popoverContentController.modalPresentationStyle = .popover

        // Set the popover presentation controller delegate so that the above methods get called.
        popoverContentController.popoverPresentationController!.delegate = self

        // Present the popover.
        self.present(popoverContentController, animated: true, completion: nil)
    }

}

Answer 3

显示来自 iPhone/iPad 的 UIModalPresentationStyle 弹出窗口：

-(void)menuButtonPressed:(UIButton *)sender {

    self.menuPopoverController = [[DownloadMenuPopoverController alloc] initWithStyle:UITableViewStylePlain];
    self.menuPopoverController.delegate = self;

    self.menuPopoverController.modalPresentationStyle = UIModalPresentationPopover;
    self.menuPopoverController.popoverPresentationController.delegate = self;
    self.menuPopoverController.preferredContentSize = CGSizeMake(250,80);
    self.menuPopoverController.popoverPresentationController.sourceRect = sender.frame;// rect to show view
    self.menuPopoverController.popoverPresentationController.sourceView = self.view;

    UIPopoverPresentationController *popPC = self.menuPopoverController.popoverPresentationController;
    popPC.permittedArrowDirections = UIPopoverArrowDirectionAny;
    popPC.delegate = self;
    [self presentViewController:self.menuPopoverController animated:YES completion:nil];

}

#pragma mark - UIPresentationController Delegate methods

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

- (UIViewController *)presentationController:(UIPresentationController *)controller viewControllerForAdaptivePresentationStyle:(UIModalPresentationStyle)style {
    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:controller.presentedViewController];
    return navController;
}

Answer 4

SWIFT 3.X

这将在屏幕中央显示弹出窗口

class CommonViewController: UIViewController, UIPopoverPresentationControllerDelegate{

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

    func showPopover() {
        let myViewController = UIViewController()
        myViewController.preferredContentSize = CGSize(width: 320, height: 200)
        myViewController.modalPresentationStyle = .popover

        let popOver = myViewController.popoverPresentationController
        popOver?.delegate = self

        self.present(myViewController, animated: true, completion: nil)
        popOver?.permittedArrowDirections = .up
        popOver?.sourceView = self.view

        let rect = CGRect(
            origin: CGPoint(x: self.view.frame.width/2,
                            y: self.view.frame.height/2),
            size: CGSize(width: 1, height: 1)
        )
        popOver?.sourceRect = rect
    }
}

Answer 5

**Made a barbutton item like this** -

let dotImage = UIImage(named: "dot")?.withRenderingMode(.alwaysOriginal) let searchImage = UIImage(named: "search")?.withRenderingMode(.alwaysOriginal) // let shareImageButton = UIBarButtonItem(image: shareImage, style: .plain, target: self, action: #selector(didTapshareImageButton(sender:))) let dotImageButton = UIBarButtonItem(image: dotImage, style: .plain, target: self, action: #selector(didTapdotImageButton(sender:))) let searchButton = UIBarButtonItem(image: searchImage, style: .plain, target: self, action: #selector(didTapSearchButton(sender:)))

**Added popover on this -**

@objc func didTapdotImageButton(sender: UIBarButtonItem){
    
    let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewController(withIdentifier: "ShareVC")
        vc.modalPresentationStyle = .popover
        let popover: UIPopoverPresentationController = vc.popoverPresentationController!
        popover.barButtonItem = sender
        popover.delegate = self
        sender.image = UIImage(named: "close")?.withRenderingMode(.alwaysOriginal)
        present(vc, animated: true, completion:nil)
    }

iPhone 上的 UIPopoverPresentationController 不产生弹出框

UIPopoverPresentationController on iPhone doesn't produce popover

ios

objective-c

iphone

popover