The document “Main.Storyboard” could not be opened. Unrecognized file content

问题

I cannot open my Storyboard after updating from Xcode 7 to Xcode 8. Can anyone help? Inside it did not show any error.

回答1:

For me opening the storyboard as "Source code", fixing merge conflicts and then also restarting Xcode did the job.

回答2:

I just find a solution as below:

Make sure the storyboard extension should start from lower case s. Ex: it should be "Test.storyboard" not "Test.Storyboard"

来源：https://stackoverflow.com/questions/39760818/the-document-main-storyboard-could-not-be-opened-unrecognized-file-content