Ios PopOverController在情节提要中工作不正常

我的story board splitview应用程序有问题。我有这个popover控制器，但当我按下bar按钮项而不是弹出屏幕顶部时，它会从侧面被按下。有什么想法吗

    - (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{    
    barButtonItem.title = NSLocalizedString(@"Master", @"Master");
    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
    self.masterPopoverController = popoverController;
}

- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    // Called when the view is shown again in the split view, invalidating the button and popover controller.
    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
    self.popoverController =nil;
    // self.masterPopoverController = ;
}

---

你能试试这个吗：

- (void)splitViewController: (UISplitViewController*)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem*)barButtonItem forPopoverController:(UIPopoverController*)popoverController {
barButtonItem.title = NSLocalizedString(@"Master", @"Master");
NSMutableArray *items = [[_toolbar items] mutableCopy];
[items insertObject:barButtonItem atIndex:0];
[_toolbar setItems:items animated:YES];
[items release];
self.popover = popoverController;

}

---

}

这不起作用=[，我添加了一个工具栏，然后按钮出现了，但按下时没有显示。您是否已将按钮的连接设置为该方法？我不知道它是否是iOS sim卡，但当我使用iOS 5.0时，它可以正常工作，看起来也不错，但当我使用5.1时，箭头消失了

- (void)splitViewController: (UISplitViewController*)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem {    
NSMutableArray *items = [[_toolbar items] mutableCopy];
[items removeObjectAtIndex:0];
[_toolbar setItems:items animated:YES];
[items release];
self.popover = nil;