iOS - 使用 StoryBoard 创建弹出视图 [英] iOS - Create an Popover View using StoryBoard

问题描述

您好，现在我正在尝试使用 Xcode 创建一个 Pop-OverView故事板.首先，我有

Hi there, Now I'm trying to create a Pop-OverView using an Xcode storyboard. Firstly, I have

rootViewController, UIViewController, and UITableViewController

我希望 UIView 充当翻页，UITableView 将在 navigationBar 项目控制器下显示 popOver.

I want the UIView to act as a page flip and the UITableView will show popOver under the navigationBar item controller.

对于 UITableView，我想在 NavigationBar 控制器下制作一个 Pop-Over.问题是，当我触摸 Navigation 项以显示 UITableViewController 时，它显示正确，但是当我尝试关闭 Pop-Over View 时，它不会关闭.然后，导航项不能正常工作.当我多次触摸它时，它会显示多个 popOverView 实例.

For the UITableView, I want to make a Pop-Over under NavigationBar controller. The problem is, when I touch the Navigation item to show the UITableViewController, it shows correctly, but when I try to close the Pop-Over View, it won't close. And then, the navigation item doesn't work well. It shows multiple instances of popOverView when I touch it multiple times.

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?

This doesn't seem to make sense to me. Can anyone help me out or tell me where to find documentation / tutorials on this?

更新:

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

For the UIPopOverController, it seems to work well now, but it is still bugging me when I touch a Navigation Item multiple times. It will show multiple instances of PopOver. How can I handle it, so it will show only one instance?

推荐答案

我遇到了同样的问题，大部分都找到了解决方案 这里.基本上，每次按下按钮以显示或关闭弹出框时，您都会更改按钮的操作.这是我最终得到的代码:

I had the same problem and mostly found the solution here. Basically you change the action of the button each time it's pressed to either display or dismiss the popover. Here's the code I ended up with:

@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];
}

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