iphone – 错误CGImageCreate：无效图像大小：0 x 0,带有(拾取器

我在通用项目中使用iOS 6得到此错误(“CG ImageCreate：无效图像大小：0 x 0”),仅适用于新的iPad模拟器(不适用于旧版本或iPhone),如果我加载带有UIPickerViewController的窗口splitViewController只在纵向(不在横向).

当我旋转iPad时,我得到了错误.

我不认为有可能产生错误的图像…为什么？

我用来加载选择器的代码：

- (void) pickerViewControllerDidFinish:(PickerViewController *)controller {
    if (UI_USER_INTERFACE_IDIOM()== UIUserInterfaceIdiomPad) {
        self.path = controller.path;             
        [self dismissViewControllerAnimated:YES completion:nil];
        FeedRootViewController *controllerF = [[FeedRootViewController alloc] initWithNibName:@"FeedRootViewController" bundle:nil];
        controllerF.path = self.path;
        controllerF.detailViewController = self.detailViewController;
        [self.navigationController pushViewController: controllerF animated:YES];
        [controllerF release];  
        NSString *urlAddress = [[NSBundle mainBundle] pathForResource:@"feeds" ofType:@"html"];
        NSURL *url = [NSURL fileURLWithPath:urlAddress];
        NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
        [detailViewController.webView loadRequest:requestObj];
        [detailViewController.webView setScalesPageToFit:YES];
        [path release];
    }
}

但是我不知道问题是否来自这个代码……