UIPopoverController放置 [英] UIPopoverController placement

问题描述

我正在开发一款应该是通用的应用，一款适用于iPad和iPhone的应用。我想保持他们的接口尽可能相似。在iPhone应用程序中，我使用的是Tab栏控制器，其中一个选项卡转到图像选择器控制器。显然我不能在iPad上做到这一点。所以我劫持了对该按钮的控制，带来了一个带有图像选择器的popupcontroller。这一切都运行得很好，除非我弹出弹出窗口，它不在正确的位置。当我旋转模拟器时，弹出窗口会转到正确的位置，并在我向后旋转时停留。

I'm working on an app that is supposed to be universal, one app for both iPad and iPhone. I would like to keep their interfaces as similar as possible. In the iPhone app I am using a Tab bar controller, and one of those tabs goes to an image picker controller. Obviously I cannot do that in iPad. So I have hijacked control of that button to bring a popupcontroller that has the image picker in it. This all works well enough, except when I bring up the popup, it is not in the correct place. When I rotate the simulator, the popup goes to the correct place, and stays when I rotate back even.

我的代码基于这个问题中的代码：
Ipad UIImagePickerController和UIPopoverController错误

My code is based on the code in this question: Ipad UIImagePickerController and UIPopoverController error

为什么我的弹出窗口不在正确的位置？

Why would my popup not be in the correct location?

推荐答案

如果您的代码基于您引用的问题，您似乎使用以下代码来显示popover：

If your code is based on the question you referenced, it would appear you are using the following code to show the popover:

[popoverController presentPopoverFromBarButtonItem:sender
                          permittedArrowDirections:UIPopoverArrowDirectionUp 
                                          animated:YES]

UIPopoverController：presentPopoverFromBarButtonItem：allowedArrowDirections：animated接受UITabBar没有的发件人的UIBarButtonItem *。 UITabBar使用UITabBarItem，它具有UIBarItem的基础。 UIBarButtonItem也有这个基础（UIBarItem）。

UIPopoverController:presentPopoverFromBarButtonItem:permittedArrowDirections:animated accepts a UIBarButtonItem* for the sender which your UITabBar does not have. UITabBar uses UITabBarItem which has a base of UIBarItem. UIBarButtonItem also has that base (UIBarItem).

无论如何......我还需要从tabbaritem显示一个uipopovercontroller，我使用了以下代码：

Anyhow... I also needed to show a uipopovercontroller from a tabbaritem, I used the following code:

MyViewController *myVC = [[MyViewController alloc] initWithNibName:@"MyViewController" bundle:[NSBundle mainBundle]];
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:myVC];
[myVC release];
popover.popoverContentSize = myVC.view.frame.size;
popover.delegate = self;
int tabBarItemWidth = self.tabBar.frame.size.width / [self.tabBar.items count];
int x = tabBarItemWidth * 6;
CGRect rect = CGRectMake(x, 0, tabBarItemWidth, self.tabBar.frame.size.height);
[popover presentPopoverFromRect:rect
                         inView:self.tabBar 
       permittedArrowDirections:UIPopoverArrowDirectionUp 
                       animated:YES];

注意：你的x计算会有所不同。为我选择的标签栏项目是第6个。
基本上

Note: your x calculation will be different. The tab bar item selected for me was the 6th one. Basically

x = tabBarItemWidth * currentTabBarItemIndex;

这篇关于UIPopoverController放置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！