Here is how to set up a segue so that it can be called programmatically.
- Control drag from the ViewController icon in the first view controller to the second view controller.
- Click on the segue arrow between the two view controllers, and in the Attributes Inspector on the right, give the segue an Identifier (tableau in your case).
- Then you can trigger the segue with performSegueWithIdentifier in your code.
You can read more about setting up and using segues here.