Storyboard iOS5 - 如何防止按 Segue 按钮时改变 Storyboard
我使用新的 iOS 5 实用程序应用程序模板创建了一个应用程序。自从以前的 SDK 以来，我们现在必须使用 GUI 的故事板（我确实喜欢使用），但我想知道如何防止“Segue”将视图翻转到故事板上的下一个视图。
默认情况下，有一个按钮，按下后会翻转到“FlipsideViewController”，我想使用此按钮作为登录表单的一部分，但我需要停止故事板进入 Segue，除非凭据正确。我已经写好了所有的登录代码，但无法阻止页面翻转。我认为可以做到这一点的方法实际上可以防止用户通过单击“FlipsideViewController”上的默认“完成”按钮返回。
有人可以帮忙吗？
I've created an app using the new iOS 5 Utility app template. Since the previous SDK, we now have to use storyboards for the GUI (which I do like using) but I am wondering how to prevent the "Segue" from flipping the view to the next view on the storyboard.
By default there is a button which when pressed flips to the "FlipsideViewController" and I would like to use this button as part of a login form but I need to stop the storyboard going to the Segue unless the credentials are correct. I have all my login code written but cannot prevent the page from flipping. The method I thought would do this actually prevents the user from going back by clicking the default "Done" button on the "FlipsideViewController".
Can anyone help?
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您必须将按钮连接到 IBAction 而不是 segue。在操作中，检查凭据是否正确，然后调用
performSegue:来执行它。您必须将 Segue 直接从视图控制器连接到下一个场景，而不是从按钮连接。
You have to connect the button to an IBAction instead of a segue. In the action, check if the credentials are correct, then call
performSegue:to perform it.You will have to connect the segue directly from the view controller to the next scene instead of from the button.