Unable to run the story board: Failed to instantiate the default view controller for UIMainStoryboardFile & #39; Main & #39;, instantiate

Unable to run the story board: Failed to instantiate the default view controller for UIMainStoryboardFile 'main', instantiate

Failed to instantiate the default view controller for UIMainStoryboardFile 'main'-perhaps the designated entry point is not set?

When you drag the storyboards of other projects, the error occurs after xcode6 runs. This means that the view controller is not set Initial Scene in StoryBoard.

Solution:

Select the problematic storyboard

Then modify

 

Check is initial view controller to solve this problem. In fact, after careful observation, it is found that there is no arrow in the previous storyboard. After the selection, it is like this:

It indicates that the storyboard is normal.