iOS - 使用 StoryBoard 创建 Popover 视图

Question

您好，现在我正在尝试使用 Xcode 创建 Pop-OverView 故事板。首先，我希望

rootViewController, UIViewController, and UITableViewController

UIView 充当翻页功能，并且 UITableView 将在 navigationBar 项目控制器下显示 popOver。

对于 UITableView，我想在 NavigationBar 控制器下制作一个 Pop-Over。问题是，当我触摸导航项以显示 UITableViewController 时，它显示正确，但是当我尝试关闭弹出视图时，它不会关闭。然后，导航项就不能很好地工作。当我多次触摸它时，它会显示 popOverView 的多个实例。

这对我来说似乎没有意义。谁能帮助我或告诉我在哪里可以找到这方面的文档/教程？

更新：

对于 UIPopOverController，它现在似乎运行良好，但当我多次触摸导航项时它仍然困扰着我。它将显示 PopOver 的多个实例。我该如何处理它，所以它只会显示一个实例？

Answer 1

我遇到了同样的问题，并且主要在此处找到了解决方案。基本上，每次按下按钮时，您都会更改按钮的操作以显示或关闭弹出窗口。这是我最终得到的代码：

@interface FilterTableViewController : UITableViewController {
    UIPopoverController *editPopover;
    id saveEditSender;
    id saveEditTarget;
    SEL saveEditAction;
}

-(void)prepareForSegue:(UIStoryboardPopoverSegue *)segue sender:(id)sender{
    if([[segue identifier] isEqualToString:@"EditFilterSegue"]){
        // Save the edit button's info so we can restore it
        saveEditAction = [sender action];
        saveEditTarget = [sender target];
        saveEditSender = sender;

        // Change the edit button's target to us, and its action to dismiss the popover
        [sender setAction:@selector(dismissPopover:)];
        [sender setTarget:self];

        // Save the popover controller and set ourselves as the its delegate so we can
        // restore the button action when this popover is dismissed (this happens when the popover
        // is dismissed by tapping outside the view, not by tapping the edit button again)
        editPopover = [(UIStoryboardPopoverSegue *)segue popoverController];
        editPopover.delegate = (id <UIPopoverControllerDelegate>)self;
    }
}

-(void)dismissPopover:(id)sender
{
    // Restore the buttons actions before we dismiss the popover
    [saveEditSender setAction:saveEditAction];
    [saveEditSender setTarget:saveEditTarget];
    [editPopover dismissPopoverAnimated:YES];
}

-(BOOL)popoverControllerShouldDismissPopover:(UIPopoverController *)popoverController
{
    // A tap occurred outside of the popover.
    // Restore the button actions before its dismissed.
    [saveEditSender setAction:saveEditAction];
    [saveEditSender setTarget:saveEditTarget];

    return YES;
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];

    // Before we navigate away from this view (the back button was pressed)
    // remove the edit popover (if it exists).
    [self dismissPopover:saveEditSender];
}