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如何使 UIsplitview 的弹出窗口在纵向模式 iPad 中可见

发布于 2024-09-17 05:42:48 字数 96 浏览 2 评论 0原文

我希望每当用户在 iPad 的 UIsplitView 中从横向视图切换到纵向视图时，弹出窗口视图就可见。虽然用户可以通过单击栏按钮使其可见，但我希望在纵向模式下自动执行此操作。

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俯瞰星空 2024-09-24 05:42:48

在“-(BOOL) shouldAutorotateToInterfaceOrientation”方法中，检查设备方向。如果是纵向，则像用户单击栏按钮时使其可见一样呈现弹出框。

一切顺利。

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我喜欢麦丽素 2024-09-24 05:42:48

UISplitViewController 向他的委托 (UISplitViewControllerDelegate) 发送消息。您可以实现此委托方法来显示弹出窗口。您可以在“详细控制器”代码中执行类似的操作：

#pragma mark -
#pragma mark UISplitViewControllerDelegate implementation
- (void)splitViewController:(UISplitViewController*)svc 
     willHideViewController:(UIViewController *)aViewController 
          withBarButtonItem:(UIBarButtonItem*)barButtonItem 
       forPopoverController:(UIPopoverController*)pc
{  
    [barButtonItem setTitle:@"Your 'popover button' title"];
    self.navigationItem.leftBarButtonItem = barButtonItem;
}


- (void)splitViewController:(UISplitViewController*)svc 
     willShowViewController:(UIViewController *)aViewController 
  invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    self.navigationItem.leftBarButtonItem = nil;
}

UISplitViewController sends messages to his delegate (UISplitViewControllerDelegate). You can implement this delegate methods to show the popover. You can do something like this in your "detail controller" code:

#pragma mark -
#pragma mark UISplitViewControllerDelegate implementation
- (void)splitViewController:(UISplitViewController*)svc 
     willHideViewController:(UIViewController *)aViewController 
          withBarButtonItem:(UIBarButtonItem*)barButtonItem 
       forPopoverController:(UIPopoverController*)pc
{  
    [barButtonItem setTitle:@"Your 'popover button' title"];
    self.navigationItem.leftBarButtonItem = barButtonItem;
}


- (void)splitViewController:(UISplitViewController*)svc 
     willShowViewController:(UIViewController *)aViewController 
  invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    self.navigationItem.leftBarButtonItem = nil;
}

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帅气称霸 2024-09-24 05:42:48

接受的答案（使用shouldAutorotateToInterfaceOrientation）对我不起作用。它要么有旋转伪影（在 4.2 和 5.0 iPad 模拟器中），要么仅在启动时显示，而在后续旋转中不再显示（4.3 模拟器）。我所做的是创建一个小辅助函数：

- (void)showPopoverInPortrait {
    if ([[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationPortrait) {
        [self.masterPopoverController presentPopoverFromBarButtonItem:self.navigationItem.leftBarButtonItem
                                             permittedArrowDirections:UIPopoverArrowDirectionAny 
                                                             animated:YES];
    }
}

并在 - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation 和 - (void)viewDidLoad 中调用它来处理启动。

The accepted answer (using shouldAutorotateToInterfaceOrientation) doesn't work for me. It either has rotation artifacts (in the 4.2 and 5.0 iPad simulators) or only shows at startup and never again in subsequent rotations (the 4.3 simulator). What I did instead was to create a little helper function:

- (void)showPopoverInPortrait {
    if ([[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationPortrait) {
        [self.masterPopoverController presentPopoverFromBarButtonItem:self.navigationItem.leftBarButtonItem
                                             permittedArrowDirections:UIPopoverArrowDirectionAny 
                                                             animated:YES];
    }
}

and call this within - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation and - (void)viewDidLoad to also handle on startup.

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