在Xcode Storyboard中使用Unwind Segue关闭Popover(Dismiss Popover using Unwind Segue in Xcode Storyboard)

 我正在使用Xcode 4.5和新的iOS 6功能来展开segues。 我在弹出窗口中呈现导航视图控制器，该控制器以编程方式从条形按钮项目呈现： 
 
- (IBAction)configChartTapped:(id)sender
{
    if (self.popover.isPopoverVisible) {

        [self.popover dismissPopoverAnimated:YES];

    } else {
        UINavigationController *chartConfigNavigationController = [self.storyboard instantiateViewControllerWithIdentifier:@"GrowthChartNavigationController"];

        ConfigChartTypeViewController *configChartTypeViewController = (ConfigChartTypeViewController*) chartConfigNavigationController.topViewController;

        self.popover = [[UIPopoverController alloc]initWithContentViewController:chartConfigNavigationController];
        self.popover.popoverContentSize = CGSizeMake(320, 500);
        self.popover.delegate = self;

        [self.popover presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }
}
 
 在这个方法旁边，我已经定义了一个目标来展开segue（即解雇popover）...... 
 
- (IBAction)cancelConfig:(UIStoryboardSegue *)segue
{
    //
}
 
 ...并将其连接到导航视图控制器导航栏中的取消按钮。 
 
 将取消栏按钮连接到cancelConfig按钮在Xcode中正常工作。 
 
 但是，在运行代码时，单击“取消”按钮时没有任何反应，尽管Xcode 4.5应该支持在展开segues时解除弹出窗口（根据发布文档）。 
 
 我错过了什么？ 
 
 谢谢！ 

I am using Xcode 4.5 and the new iOS 6 feature to unwind segues. I am presenting a navigation view controller inside a popover which is presented programmatically from a bar button item:
 
- (IBAction)configChartTapped:(id)sender
{
    if (self.popover.isPopoverVisible) {

        [self.popover dismissPopoverAnimated:YES];

    } else {
        UINavigationController *chartConfigNavigationController = [self.storyboard instantiateViewControllerWithIdentifier:@"GrowthChartNavigationController"];

        ConfigChartTypeViewController *configChartTypeViewController = (ConfigChartTypeViewController*) chartConfigNavigationController.topViewController;

        self.popover = [[UIPopoverController alloc]initWithContentViewController:chartConfigNavigationController];
        self.popover.popoverContentSize = CGSizeMake(320, 500);
        self.popover.delegate = self;

        [self.popover presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }
}
 
Next to this method I have defined a target to unwind the segue (i.e. dismissing the popover)...
 
- (IBAction)cancelConfig:(UIStoryboardSegue *)segue
{
    //
}
 
... and connected it to a cancel button in the navigation view controllers's navigation bar.
 
Connecting the cancel bar button to the cancelConfig button worked fine in Xcode. 
 
However, when running the code, nothing happens when clicking on the Cancel button despite Xcode 4.5 should be supporting dismissing popovers when unwinding segues (according to the release docs).
 
What did I miss? 
 
Thank you!

原文：https://stackoverflow.com/questions/13457296