Swift Learning-drip--2~storyboard new Viewcontroller

Problem:

Storyboard A new Viewcontroller, the first controller cannot be associated, a black screen is displayed, the console display

Failed to instantiate the default view controller for Uimainstoryboardfile ' Main '-perhaps the designated entry Not set?

Workaround:

In your stories board file select the Viewcontroller you want to assign as first controller and check on is initial View Con Troller Check the image.

The new viewcontroller needs to be associated and assigned to the first controller, and the view controller is initialized.

As shown in the following:

Swift Learning-drip--2~storyboard new Viewcontroller