ios - 展开 2 个 View Controller 的转场

Question

我在 View Controller 上有一个按钮(后退按钮)。到目前为止很简单。
我有 2 个 View Controller ，每个 Controller 都有一个表。
如果用户从任一表中选择一行，它将转到 View Controller 并打开后退按钮。
后退按钮需要返回到用户选择行时所在的原始 View Controller 。

我正在考虑为此展开转场，这很好，但我不能在一个按钮上添加两个转场。一个用于返回一个 TableView ，一个用于返回另一个 TableView ，具体取决于它们用于访问 View Controller 的 TableView 。

有任何想法吗 ？

Answer 1

正如沃尔克解释的那样，

-(IBAction)devDismiss
    {
    NSLog(@" ------- dev dismiss .....");

    // for a custom segue unwind, you must do this...
    [self performSegueWithIdentifier:@"specialWord" sender:self];

    // "specialWord" is the identifier set on storyboard for the
    // custom unwind segue

    /* for a "default" unwind segue, do this...
    [self dismissViewControllerAnimated:YES completion:nil];
    Note, if you used a push segue, you should use
      [self.navigationController popViewControllerAnimated:YES]
    If you used a modal segue, you should use
      [self dismissViewControllerAnimated:YES completion:nil] "
    */
    }

请注意，确实，您还必须在 segueForUnwindingToViewController: 覆盖中使用“specialWord”，这将位于 DESTINATION(即 ORIGINAL) View Controller 中，即位于下方的 View Controller 中。

-(UIStoryboardSegue *)segueForUnwindingToViewController:
                          (UIViewController *)toViewController 
              fromViewController:(UIViewController *)fromViewController 
              identifier:(NSString *)identifier
    {
    NSLog(@"we're in _your class name_, segueForUnwindingToViewController %@",
      identifier);

    // for some unwinds, we have a custom unwind we want to use.
    // so, check the identifier:
    if ([identifier isEqualToString:@"specialWord"])
        {
        YourCustomUnwindSegue *sg = [[YourCustomUnwindSegue alloc] 
                           initWithIdentifier:identifier 
                           source:fromViewController 
                           destination:toViewController];
        return sg;
        }

    // don't forget the break-away "return" inside any macthes.

    // NSLog(@"note, if this message appears, it's likely you have a typo
    //  somewhere for 'specialWord' - unless you genuinely have a situation
    //  where it will also fall through to the 'default' unwind segue :O ");

    // BE SURE TO return the default unwind segue otherwise
    return [super segueForUnwindingToViewController:toViewController 
                                 fromViewController:fromViewController
                                         identifier:identifier];
    }