Ios UIPopoverPresentationController始终显示全屏模式弹出窗口

我试图将视图控制器显示为按钮下方或窗口中心的UIPopoverPresentationController。但它总是显示为全窗口模式弹出窗口

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    MySecondViewController *controller = [storyboard instantiateViewControllerWithIdentifier:@"Pop"];

    // present the controller
    // on iPad, this will be a Popover
    // on iPhone, this will be an action sheet
    controller.modalPresentationStyle = UINavigationControllerOperationPop;
    [self presentViewController:controller animated:YES completion:nil];
    controller.preferredContentSize = CGSizeMake(280, 230);
    // configure the Popover presentation controller
    UIPopoverPresentationController *popController = [controller popoverPresentationController];
    popController.permittedArrowDirections = UIPopoverArrowDirectionUp;
    popController.delegate = self;

    // in case we don't have a bar button as reference
    popController.sourceView = self.showPop;
    popController.sourceRect = CGRectMake(384, -120, 280, 230);


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

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试试这个代码，它正在工作

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
SecondViewController *controller = [storyboard instantiateViewControllerWithIdentifier:@"pop"];

controller.modalPresentationStyle = UIModalPresentationPopover;
controller.preferredContentSize = CGSizeMake(280, 230);
// configure the Popover presentation controller

controller.popoverPresentationController.delegate = self;
controller.popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirectionUp;


// in case we don't have a bar button as reference
controller.popoverPresentationController.sourceView = self.view;
controller.popoverPresentationController.sourceRect = CGRectMake(384, -120, 280, 230);
//    controller.presentationController.delegate = self;
[self presentViewController:controller animated:YES completion:nil];

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我已经为同一个问题发布了另一个问题，我已经解决了我的问题。以下是问题的链接：

在ViewController.h中，首先创建UIPopOverpresationController的属性

@property(nonatomic,retain)UIPopoverPresentationController *dateTimePopover8;

然后显示PopOverPresentationcontroller

    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.modalPresentationStyle = UIModalPresentationPopover;
                destNav.navigationBarHidden = YES;
                [self presentViewController:destNav animated:YES completion:nil];

你们一定注意到了，我们展示的是视图控制器，而不是popOver。所以我们也必须以新的方式隐藏它。当我们点击屏幕时，它会自动隐藏

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

我们必须在实现文件中实现UIPopOverpresationController的委托。请在实现文件中写下委托方法

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

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在故事板中，这很容易。只需将控件从触发操作的控件（例如UIBarButton或普通按钮）拖动到情节提要视图控制器（如果是导航控制器的根视图，则拖动到导航控制器）。 选择segue并将属性检查器中的种类更改为“以模式显示”，presentation:Form sheet（如果希望它显示在中间），选择所需的转换类型（默认为cool）

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正如上面提到的@Lukas1，您应该遵循UIPopoverPresentationControllerDelegate并实现adaptivePresentationStyle方法（该方法实际上是在

UIAdaptivePresentationControllerDelegate

协议，

UIPopoverPresentationControllerDelegate

父类中定义的）并返回

以下是Swift5中的实现：

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


“我将使用bar按钮…它会在全屏上显示tablewiew…我该怎么做…”哈桑Aftab@SurajSukale，这对你来说可能太晚了，但也许其他人可以从这个评论中受益。您应该将一个委托分配给controller.popoverPresentationController，并在委托实现方法中
adaptivePresentationStyle（for:UIPresentationController）
，返回值
UIModalPresentationStyleNone