键盘滑回后 UIPopoverController 未移至原始位置

发布于 2024-09-15 13:38:43 字数 171 浏览 5 评论 0原文

我正在 iPad 中显示带有 UINavigation 栏的弹出框。在第二个视图中，我有一个可以显示键盘的 UISearchController。键盘将弹出窗口向上推，这很好，但是如果我现在按下 UINavigation 栏上的“后退”按钮，它会关闭键盘，这很好，但弹出窗口不会滑回其原始位置。有人知道如何解决这个问题吗？谢谢！

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讽刺将军 2024-09-22 13:38:43

好吧，所以我实际上弄清楚了（我相信）你的问题在问什么……以防万一有人从谷歌上偶然发现这个问题，我想我会回答我是如何做到的。这感觉像是一项黑客工作，但我找不到任何其他方法来做到这一点。

在调出键盘的控制器中，我让它在键盘关闭时发布通知：

    [aTextField resignFirstResponder];
[[NSNotificationCenter defaultCenter] postNotificationName:@"movePopups" object:nil];

然后回到控制 UIPopover 的主屏幕控制器，我添加了一个侦听器：

    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(movePopUpToRightLocation)
                                             name:@"movePopups"
                                           object:nil];

在 init 内部。请务必记住删除 dealloc 中的侦听器，以实现良好的编程实践：

[[NSNotificationCenter defaultCenter] removeObserver:self];

因此，每当我收到键盘消失的通知时，我都会获得对弹出窗口显示的按钮的引用，然后直接将其重新显示it:

-(void)movePopUpToRightLocation {
NSLog(@"move pop up to right location");
if (morePopUp) {
    UIBarButtonItem *barButtonItem = (UIBarButtonItem *)[[bottomToolBar items] objectAtIndex:0];
    [morePopUp presentPopoverFromBarButtonItem:barButtonItem
                      permittedArrowDirections:UIPopoverArrowDirectionDown
                                      animated:YES];            
}

}

我没有添加任何检查它是哪个弹出窗口，但如果我有超过 1 种类型的弹出窗口/按钮，我可以轻松地做到这一点。但这是你可以遵循的基本前提。

希望有帮助！

Ok so I actually figured out (I believe) what your question was asking...and just in case anyone stumbles upon this from google, I figured I'd answer how I did it. It feels like a hack job but I haven't been able to find any other way to do it.

In the controller that brings up the keyboard,I had it post a notification whenever the keyboard dismisses:

    [aTextField resignFirstResponder];
[[NSNotificationCenter defaultCenter] postNotificationName:@"movePopups" object:nil];

Then back on my home screen controller, that controls the UIPopover, I added a listener:

    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(movePopUpToRightLocation)
                                             name:@"movePopups"
                                           object:nil];

inside the init. Be sure to remember to remove the listener in your dealloc for good programming practice:

[[NSNotificationCenter defaultCenter] removeObserver:self];

So then whenever I get notification that the keyboard disappears, I get a reference to the button that the popover shows up from, and just have it re-appear directly from it:

-(void)movePopUpToRightLocation {
NSLog(@"move pop up to right location");
if (morePopUp) {
    UIBarButtonItem *barButtonItem = (UIBarButtonItem *)[[bottomToolBar items] objectAtIndex:0];
    [morePopUp presentPopoverFromBarButtonItem:barButtonItem
                      permittedArrowDirections:UIPopoverArrowDirectionDown
                                      animated:YES];            
}

}

I haven't added any checks for which popup it is, but I can easily do that if I have more than 1 type of popover / button that it would appear from. But that's the basic premise that you can go from.

Hope it helps!

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居里长安 2024-09-22 13:38:43

您还可以在初始化程序中的某个位置注册 UIKeyboardDidHideNotification。

[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movePopoverBack:) name:UIKeyboardDidHideNotification object:nil];

这段代码将弹出窗口向后移动：

- (void)movePopoverBack:(id)sender {
    if ([self.settingsPopoverController isPopoverVisible]) {
        [self performSelector:@selector(hidePopover) withObject:nil afterDelay:0.1];
        [self performSelector:@selector(movePopoverBack) withObject:nil afterDelay:0.5];
    }
}

- (void)hidePopover {
    [self.settingsPopoverController dismissPopoverAnimated:YES];
}

- (void)movePopoverBack {
    [self.settingsPopoverController
     presentPopoverFromBarButtonItem:self.bottomToolbar.settingsButton
     permittedArrowDirections:UIPopoverArrowDirectionDown
     animated:YES];  
}

我没有让它在没有延迟的情况下工作，但这对于我当前的项目来说似乎是可以接受的。希望它能帮助某人。

You could also register for the UIKeyboardDidHideNotification somewhere in the initializer.

[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(movePopoverBack:) name:UIKeyboardDidHideNotification object:nil];

This code moves the popover back:

- (void)movePopoverBack:(id)sender {
    if ([self.settingsPopoverController isPopoverVisible]) {
        [self performSelector:@selector(hidePopover) withObject:nil afterDelay:0.1];
        [self performSelector:@selector(movePopoverBack) withObject:nil afterDelay:0.5];
    }
}

- (void)hidePopover {
    [self.settingsPopoverController dismissPopoverAnimated:YES];
}

- (void)movePopoverBack {
    [self.settingsPopoverController
     presentPopoverFromBarButtonItem:self.bottomToolbar.settingsButton
     permittedArrowDirections:UIPopoverArrowDirectionDown
     animated:YES];  
}

I didn't get it working without the delays, but this seems to be acceptable for my current project. Hope it helps someone.

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