iphone - 查找父 UIActionSheet

Question

我有一个 UIActionSheet 来选择在我的应用程序中使用的时间。选择时间可以正常工作，但是当单击“完成”按钮时，我找不到隐藏操作表的方法。

我的代码是:

-(void) showTimespanPicker{
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:NSLocalizedString(@"Preparation Time", "Preparation Time")
    delegate:self                                    cancelButtonTitle:nil//@"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:nil];

    [actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
    actionSheet.tag = PREPTIME_PICKER;

    CGRect pickerFrame = CGRectMake(0, 40, 0, 0);
    prepTimePicker = [[UIDatePicker alloc] initWithFrame:pickerFrame];
    prepTimePicker.datePickerMode = UIDatePickerModeCountDownTimer;
    prepTimePicker.countDownDuration = (NSTimeInterval )[recipe.prepTime doubleValue];

    [actionSheet addSubview:prepTimePicker];
    [prepTimePicker release];

    // create toolbar with "Done" button
    UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
    UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleBordered target:self action:@selector(prepTimeSelected)];
    NSArray *barButtons = [NSArray arrayWithObject:barButtonItem];
    [toolbar setItems:barButtons];
    [actionSheet addSubview:toolbar];

    MyAppAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
    [actionSheet showInView:delegate.window];
    [actionSheet setBounds:CGRectMake(0, 0, 320, 485)];
}
// fires when the done button is clicked
-(void)prepTimeSelected {
    recipe.prepTime = (NSInteger)prepTimePicker.countDownDuration;
    [self updatePickerValues];
    [[prepTimePicker.superview].setHidden:YES];
}

prepTimeSelected 中的最后一行隐藏了 UIDatePicker，但不隐藏操作表。我认为我需要某种递归方式来查找按钮的父级，或者为 ActionSheet 创建一个类变量/属性，但这种方式感觉不对。

Answer 1

UIActionSheet *menuProperty;    

@property(nonatomic,retain) UIActionSheet *menuArea;  

然后您需要在 .m 文件中进行以下更改

menuArea = [[UIActionSheet alloc] initWithTitle:nil  delegate:self
                                        cancelButtonTitle:@"Done"  
                                    destructiveButtonTitle:nil
                                         otherButtonTitles:nil];  


// Add the picker  
pickerArea = [[UIPickerView alloc] initWithFrame:CGRectMake(0,185,0,0)];  

pickerArea.delegate = self;  
pickerArea.showsSelectionIndicator = YES;    // note this is default to NO  

[menuArea addSubview:pickerArea];  
[menuArea showInView:self.view];  
[menuArea setBounds:CGRectMake(0,0,320, 600)];