ios - PerformSegueWithIdentifier does not work -

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I am trying to use self.performSegueWithIdentifier to change the view on the storyboard A JSON file is loaded remotely, for that I am using Swift class "agent" so that an HTTP request can be done. When I type "done" out of the variable 

  self.performSegueWithIdentifier ("toView2", sender: self)

then everything is working is. Why is not this working? I think there is something to do with "sender: myself" but I do not know how to solve it. I have not received any error on Xcode, it just loads data from my server and then nothing happens ...

In fact, the problem is that you have entered the queue on one side

and just to get the main line and putting the Seg in it, it will work very well.


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