iPhone：使用FPPopover类与UIBarButtonItem一起使用时出错 [英] iPhone: Error when using the FPPopover class when using it with a UIBarButtonItem

问题描述

我正在使用 FPPopover 类为iPhone创建弹出窗口。
我遵循自述文件中的确切步骤，但我没有使用xib文件中的UI按钮，而是使用以编程方式创建的UIBarButtonItem。但是，我收到以下错误：

I am using the FPPopover class which creates popups for iPhones. I followed the exact steps that are in the readme file but instead of using a UIbutton from a xib file, I am using a UIBarButtonItem created programmatically. But, I get the following error:

由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：' - [UIBarButtonItem superview]：无法识别选择器发送到实例0x6a3e420'

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIBarButtonItem superview]: unrecognized selector sent to instance 0x6a3e420'

我复制粘贴了与自述文件中相同的代码，但我刚刚更改了（UIButton *）okButton with（id）sender（id这里是UIBarButtonItem *）

I copy pasted the same code as in the readme file but I just changed the (UIButton*)okButton with (id)sender (id here is UIBarButtonItem*)

-(void)popover:(id)sender
{
    //the view controller you want to present as popover
    TestClass *controller = [[TestClass alloc] init];
    //our popover
    FPPopoverController *popover = [[FPPopoverController alloc] initWithViewController:controller];
    //the popover will be presented from the okButton view
    [popover presentPopoverFromView:sender];
    //release
    [controller release];
}

我想也许它与UIButButtonItem有关，而UIButButtonItem不是UIButton ？还是别的什么？我尝试将UIBarButtonItem转换为UIButton，但仍然给了我同样的错误。它的任何解决方案？

I was thinking maybe it has to do with the UIBarButtonItem which is not a UIButton? Or is it anything else? I tried converting the UIBarButtonItem into UIButton but still gave me the same error. Any solutions to it?

以下是另外一个注意事项：这是我以编程方式创建导航栏和条形按钮的方式：

One more note just in case: This is how I programmatically created the navigation bar along with the bar button:

UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(320, 0, 320, 44)];
UINavigationItem *navItem = [[UINavigationItem alloc] initWithTitle:@"By Clubs"];
[navBar pushNavigationItem:navItem animated:NO];
UIBarButtonItem *editButton = [[UIBarButtonItem alloc] initWithTitle:@"Filter"
                                               style:UIBarButtonItemStyleBordered
                                              target:self
                                              action:@selector(popover:)];


navItem.rightBarButtonItem = editButton;

推荐答案

presentPopoverFromView只接受UIView子类。 UIBarButtonItem不是UIView的子类，因此您需要找到与该按钮项相关的视图。这是我与FPPopoverController一起使用的解决方案

the presentPopoverFromView is only accepting a UIView subclass. UIBarButtonItem is not a subclass of UIView, so you need to find the view related to that button item. This is the solution I'm using with FPPopoverController

    UIBarButtonItem *buttonItem = sender;
    UIView* btnView = [buttonItem valueForKey:@"view"];
    //On these cases is better to specify the arrow direction
    [popover setArrowDirection:FPPopoverArrowDirectionUp];
    [popover presentPopoverFromView:btnView];

这应该有效！让我知道！

This should work! Let me know!

这篇关于iPhone：使用FPPopover类与UIBarButtonItem一起使用时出错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！