如何在 PopOver 中选择按钮？

Question

- (IBAction)openImagePicker:(id)sender //Makes UIImagePicker roll up from the bottom.
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
    {
        // We are using an iPhone
        UIActionSheet *alertSheet = [[UIActionSheet alloc] initWithTitle:@"Where do you want to get your daily image?" delegate:(self) cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Camera", @"Library", nil];
        [alertSheet setTag:0];
        [alertSheet setDelegate:self];
        [alertSheet showFromTabBar:[[self tabBarController] tabBar]];
        [alertSheet release];
    }
    else
    {
        // We are using an iPad
        UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
        imagePickerController.delegate = self;
        UIPopoverController *popoverController=[[UIPopoverController alloc] initWithContentViewController:imagePickerController];
        popoverController.delegate=self;
        [popoverController presentPopoverFromRect:((UIButton *)sender).bounds inView:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
    }
}

所以它在 iPad 部分的位置，我想要它做的是让你在拍摄一张新照片和使用你已有的照片之间做出选择，就像它在 iPhone 上一样。现在所有它都可以让你选择一个你已经拿过的。

Answer 1

UIActionSheet 有一个名为showFromBarButtonItem: animated: 的方法。如果您指定一个条形按钮项，则操作表将显示在 iPad 上的弹出窗口中。