获取 UIBarButtonItem 的框架

Question

我在导航栏中创建了一个UIBarButtonItem：

UIBarButtonItem *filtroFecha = [[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(filtrarFecha:)]autorelease];

    self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects: addActivity, filtroFecha, nil];

现在我想从这个按钮打开一个弹出窗口，但我无法获取UIBarButtonItem的框架。

if (_filtroActividadesView == nil) {
        self.filtroActividadesView = [[CRMFiltroActividadViewController alloc] init];
        _filtroActividadesView.delegate = self;
        self.filtroPopover = [[UIPopoverController alloc] 
                                  initWithContentViewController:_filtroActividadesView];               
    }
    [self.filtroPopover presentPopoverFromRect:CGRectMake(0, 0, 1400, 44) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];

谢谢！！

Answer 1

使用 presentPopoverFromBarButtonItem:permittedArrowDirections:animated: 。

[self.filtroPopover presentPopoverFromBarButtonItem:filtroFecha
                    permittedArrowDirections:UIPopoverArrowDirectionUp
                    animated:YES];