如何使用关闭按钮关闭 UIActionSheet 并避免崩溃？

Question

我读过另一篇文章（如何解除操作表），我可以用

[actionSheet dismissWithClickedButtonIndex:0 animated:YES];

它来使用关闭按钮关闭 uiactionsheet，如以下定义：

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil 
                                                         delegate:nil
                                                cancelButtonTitle:nil
                                           destructiveButtonTitle:nil
                                                otherButtonTitles:nil];

[actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];

CGRect pickerFrame = CGRectMake(0, 40, 0, 0);

UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:pickerFrame];
pickerView.showsSelectionIndicator = YES;
pickerView.dataSource = self;
pickerView.delegate = self;


[actionSheet addSubview:pickerView];
[pickerView release];

UISegmentedControl *closeButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:@"Close"]];
closeButton.momentary = YES; 
closeButton.frame = CGRectMake(260, 7.0f, 50.0f, 30.0f);
closeButton.segmentedControlStyle = UISegmentedControlStyleBar;
closeButton.tintColor = [UIColor blackColor];
[closeButton addTarget:self action:@selector(dismissActionSheet:) forControlEvents:UIControlEventValueChanged];
[actionSheet addSubview:closeButton];


[actionSheet dismissWithClickedButtonIndex:0 animated:YES];


[closeButton release];


[actionSheet showInView:[[UIApplication sharedApplication] keyWindow]];

[actionSheet setBounds:CGRectMake(0, 0, 320, 485)];

---

但是，我不确定在哪里放置此行，假设这将解决我的问题：

[actionSheet dismissWithClickedButtonIndex:0 animated:YES]; 

此外，当我单击关闭按钮时，应用程序崩溃，并显示错误消息“程序收到错误”消息 SIGBRT”。我认为我的两个问题是相关的。有什么帮助吗？

Answer 1

只需实现 dismissActionSheet 并将您的解雇消息放在那里即可。

dismissActionSheet 方法看起来像这样：

-(void)dismissActionSheet {
   [sheet dismissWithClickedButtonIndex:0 animated:YES];
}