Obj-C，在UIActionSheet中显示UIPickerView，但是需要保存到NSUserDefaults并刷新表内容，但是在哪里？ [英] Obj-C, showing a UIPickerView in an UIActionSheet, but need to save to NSUserDefaults and refresh table contents, but where?

问题描述

我正在使用 pickerView didSelectRow 将所选值保存到NSUserDefaults并重新填充表视图。但是，此时操作表/选择器视图仍然可见，用户可以选择新值，并且将再次调用didSelectRow。

I was using pickerView didSelectRow to save the selected value to NSUserDefaults and re populate my table view. However, at the point the action sheet / picker view is still visible and the user can select new values and didSelectRow will be called again.

编辑：为了澄清，我不知道我不想在这一点上填充表格视图。

To clarify I don't want to populate my table view at this point.

我正在寻找一个事件，该事件可以保存值并在取消选择器视图后重新填充。

I'm looking for an event when I can save the value and re-populate after the picker view is dismissed.

我可以使用什么？

这是我的代码，用于显示操作表/选择器视图。

Here's my code to show the action sheet / picker view.

- (IBAction)btnClicked:(id)sender {
NSString *title = UIDeviceOrientationIsLandscape([UIDevice currentDevice].
   orientation) ? @"\n\n\n\n\n\n\n\n\n" : @"\n\n\n\n\n\n\n\n\n\n\n\n" ;
UIActionSheet *actionSheet = [[[[UIActionSheet alloc] init] 
  initWithTitle:[NSString stringWithFormat:@"%@%@", 
  title, NSLocalizedString(@"Select the recurrence", @"")] delegate:self 
  cancelButtonTitle:nil destructiveButtonTitle:nil 
  otherButtonTitles:@"OK", nil] autorelease];

[actionSheet showInView:self.view];

UIPickerView *pickerView = [[[UIPickerView alloc] init] autorelease];

pickerView.showsSelectionIndicator = YES;
pickerView.dataSource = self;
pickerView.delegate = self;
[actionSheet addSubview:pickerView];
}

推荐答案

如果您要取消该操作使用上面定义的确定按钮创建工作表，然后可以使用操作表委托方法 actionSheet：willDismissWithButtonIndex：方法。如果将选择器的选择存储在选择器视图委托方法中，然后在取消操作表时将选择器的选择内容写入默认值，这样就可以覆盖您。

If you are dismissing the action sheet using the OK button defined above then you can use the action sheet delegate method actionSheet:willDismissWithButtonIndex: method. If you store the picker's selection in the picker view delegate methods, then write it to defaults when the action sheet is dismissed, this should cover you.

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