Question

我正在关注当iPad处于纵向时隐藏分割视图左侧的演示，然后按下放置在工具栏中的按钮时将其显示为弹出窗口。我一步一步地按照所有步骤进行操作（除此之外）当我按下按钮时，而不是在弹出窗口中，视图显示从左向右滑动。我还注意到，我可以通过从左向右滑动手指而不是按下按钮来获得相同的结果。这是我使用的代码（相同的代码在演示中正常工作）。

应该在Popover中显示的视图的View Controller中的

：

-(BOOL)splitViewController:(UISplitViewController*)svc
  shouldHideViewController:(UIViewController*)vc
             inOrientation:(UIInterfaceOrientation)orientation
{
    return [self splitViewBarButtonItemPresenter] ? UIInterfaceOrientationIsPortrait(orientation) : NO;
}

-(void)splitViewController:(UISplitViewController *)svc
    willHideViewController:(UIViewController *)aViewController
         withBarButtonItem:(UIBarButtonItem *)barButtonItem
      forPopoverController:(UIPopoverController *)pc
{
    barButtonItem.title = self.title;
    [self splitViewBarButtonItemPresenter].splitViewBarButtonItem = barButtonItem;
}

-(void)splitViewController:(UISplitViewController *)svc
    willShowViewController:(UIViewController *)aViewController
 invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    [self splitViewBarButtonItemPresenter].splitViewBarButtonItem = nil;
}

在应显示Popover的视图中：

-(void)setSplitViewBarButtonItem:(UIBarButtonItem *)splitViewBarButtonItem
{
    if (_splitViewBarButtonItem != splitViewBarButtonItem){
        NSMutableArray *toolbarItems = [self.toolbar.items mutableCopy];
        if (_splitViewBarButtonItem) [toolbarItems removeObject:_splitViewBarButtonItem];
        if (splitViewBarButtonItem) [toolbarItems insertObject:splitViewBarButtonItem atIndex:0];
        self.toolbar.items = toolbarItems;
        _splitViewBarButtonItem = splitViewBarButtonItem;
    }
}

SplitViewBarButtonItemPresenter只是一个协议，用于委托谁应该显示（你猜对了！）弹出框的按钮。

弹出窗口无法正确显示

0 个答案: