iphone - 按取消按钮不会缩回

Question

我正在实现一份行动表。当我按“确定”按钮时，执行这些操作，按“取消”返回。 “确定”按钮工作正常，但是当我按下“取消”按钮时，没有任何反应，它不会缩回或执行任何操作，只是卡在操作 TableView 上。

下面是我的代码:

在导航栏上创建按钮:

UIBarButtonItem *clearButton = [[[UIBarButtonItem alloc] initWithTitle:@"Clear     History"
                                                                      style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(ClearHistoryAction:)] autorelease];
self.navigationItem.leftBarButtonItem = clearButton;

当我单击并启动操作表时:

   - (IBAction)ClearHistoryAction:(id)sender
  {
UIActionSheet *actionSheet = [[UIActionSheet alloc]
                              initWithTitle:@"Clear History?"
                              delegate:self
                              cancelButtonTitle:@"Cancel"
                              destructiveButtonTitle:@"OK"
                              otherButtonTitles:nil];


// use the same style as the nav bar
actionSheet.actionSheetStyle = self.navigationController.navigationBar.barStyle;    

[actionSheet showInView:self.view];
    [actionSheet release];


    }

如果选择“确定”，请执行以下操作:

  - (void)actionSheet:(UIActionSheet *)actionSheet

 didDismissWithButtonIndex:(NSInteger) buttonIndex
  {
if (!buttonIndex == [actionSheet cancelButtonIndex])
{

    //do what i want here!
}
  }

在头文件中，UIActionSheetDelegate包含在@interface中。

Answer 1

迟到了，但可能的解释是:

Seems to be an issue with the tabbar. If you call UIActionSheet's

[sheet showInView:self.view]

from a view controller that is a child of a UITabViewController, then the hit testing on the cancel button fails in that portion of the UIActionSheet that lies above the tabbar's view.

如果您改为传入 UITabBarController 的 View ，则 UIActionSheet 将按预期运行。

[sheet showInView:self.parentViewController.tabBarController.view];

这里有更详细的解释: UIActionSheet cancel button strange behaviour