无法关闭 2 个 UIActionSheets

Question

我在 UIToolbar 中有 2 个 UIBarButoon 。每个都有一个 IBAction 来启动自己的 UIActionSheets。

现在，如果我呈现一个，然后单击另一个 UIBarButton，另一个 ActionSheet 也会呈现，所以我在屏幕上有两个，并且它们是重叠的。我希望当另一个出现时将其驳回，等等。

我现在有以下代码：

- (IBAction)showFirstActionSheet:(id)sender
{
    if (!self.eRXActionSheet)
    {
        UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"eRX Menu" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"New eRX", @"eRX Refills", nil];
        sheet.actionSheetStyle = UIActionSheetStyleBlackOpaque;
        self.eRXActionSheet = sheet;
        [sheet release];

        [self.eRXActionSheet showFromBarButtonItem:sender animated:YES];

        return;
    }

    [self.eRXActionSheet dismissWithClickedButtonIndex:self.eRXActionSheet.cancelButtonIndex animated:YES];
    self.eRXActionSheet = nil;
}

- (IBAction)showSecondActionSheet:(id)sender
{
    if (!self.actionSheet)
    {
        UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"Action Menu" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Help", @"Lock", @"Log Out", nil];
        sheet.actionSheetStyle = UIActionSheetStyleBlackOpaque;
        self.actionSheet = sheet;
        [sheet release];

        [self.actionSheet showFromBarButtonItem:sender animated:YES];

        return;
    }

    [self.actionSheet dismissWithClickedButtonIndex:self.actionSheet.cancelButtonIndex animated:YES];
    self.actionSheet = nil;
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (actionSheet == self.eRXActionSheet)
    {
        if (buttonIndex == 0)
        {
            [self erxButtonClicked];
        }
        else if (buttonIndex == 1)
        {
            [self erxRefillButtonClicked];
        }
    }
    else
    {
        if (buttonIndex == 0)
        {
            [self helpButtonClicked];
        }
        else if (buttonIndex == 1)
        {
            [self lockButtonClicked];
        }
        else if (buttonIndex == 2)
        {
            [self logOut];
        }
    }
}

Answer 1

在您的代码中，在创建操作表之前，您将检查要显示的操作表是否不为零。从逻辑上讲，这将始终评估为 true。

相反，您应该检查其他操作表是否不为零。如果是这样，请忽略它并创建新的。

-(void)buttonForActionSheet1Clicked {
    if (actionSheet2 != nil) {
        // dismiss it
    }
    // show actionSheet1
}

-(void)buttonForActionSheet2Clicked {
    if (actionSheet1 != nil) {
        // dismiss it
    }
    // show actionSheet2
}

或者，您可以先禁用工具栏中的其他按钮，强制用户使用取消按钮关闭当前操作表。

Answer 2

在要关闭的操作表上调用 dismissWithClickedButtonIndex:animated: 。

例如，在 showFirstActionSheet 中添加此行以忽略另一行：

if(self.actionSheet) [self.actionSheet dismissWithClickedButtonIndex:<indexofCancelButton> animated:YES];