UIPopoverPresentationController在iPhone上显示全屏模式

Question

在iPad上，UIPopoverPresentationController可以正常工作，但在iPhone上，它始终显示全窗口模式弹出窗口。我正在使用以下代码：

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
MySecondViewController *contentVC = [storyboard instantiateViewControllerWithIdentifier:@"Pop"];
contentVC.modalPresentationStyle = UINavigationControllerOperationPop; // 13
UIPopoverPresentationController *popPC = contentVC.popoverPresentationController; // 14
contentVC.popoverPresentationController.sourceRect =CGRectMake(100, 130, 280, 230);
self.navigationController.preferredContentSize = CGSizeMake(200, self.parentViewController.childViewControllers.lastObject.preferredContentSize.height-100);
//self.showPop.frame; // 15
contentVC.popoverPresentationController.sourceView =
self.showPop; // 16
popPC.permittedArrowDirections = UIPopoverArrowDirectionAny; // 17
popPC.delegate = self; //18
[self presentViewController:contentVC animated:YES completion:nil];

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

Answer 1

在ViewController.h中，首先创建UIPopoverPresenatationController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];

您一定已经注意到，我们展示的是View Controller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UIPopoverPresenatationController的委托，在实现文件中的委托方法下面编写。

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