iOS 6 - 我可以在解开segue时返回数据吗？ [英] iOS 6 - can i return data when i unwind a segue?

问题描述

我使用故事板工具创建了一个简单的展开segue。我已创建在我想放松到视图以下事件处理程序：

I have created a simple unwind segue using the storyboard tools. I have created the following event handler in the view I want to unwind to:

-(IBAction)quitQuiz:(UIStoryboardSegue *)segue {
    NSLog(@"SEGUE unwind");
}

这会正确触发并解开segue（消息会被记录）。

This fires correctly and unwinds the segue (the message gets logged).

当用户退出测验时，我想传回一些数据并且一直在努力解决这个问题。任何人都可以建议吗？

When the user quits the quiz I would like to pass some data back and have been struggling with how to achieve this. Can anyone advise?

推荐答案

谢谢杰夫。观看了 WWDC视频407 后，我有一个明确的解决方案。

Thanks Jeff. After watching WWDC video 407 I have a clear solution.

在作为展开目标的视图控制器中，你应该创建一个方法，获取单个UIStoryboardSegue参数并返回IBAction。 UIStoryboardSegue有一个返回源视图控制器的方法！这里是从视频（信用苹果）所采取的例子

In the view controller that is the target of the unwind you should create a method that takes a single UIStoryboardSegue parameter and returns an IBAction. The UIStoryboardSegue has a method to return the source view controller! Here is the example taken from the video (credit to Apple).

- (IBAction)done:(UIStoryboardSegue *)segue {
    ConfirmationViewController *cc = [segue sourceViewController];
    [self setAccountInfo:[cc accountInfo]];
    [self setShowingSuccessView:YES];
}

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