Xcode9 xib only supports iOS7.0 and later versions, xcode9xibios7.0

Xcode9 xib only supports iOS7.0 and later versions, xcode9xibios7.0

After Xcode is upgraded to version 9, the minimum version of xib is restricted. If no version is specified before, an error is returned, as shown below:

In this case, according to the error message, it is obvious that the lowest version supported by the ib file is iOS7, so I set the version of the xib file to iOS7.0, as shown below:

If the version is not specified, select the corresponding iOS version as needed.

 

Note: Make sure to change all the xib files in the project. I still reported this error after the change was completed, and did not take it seriously, later, I turned around to find another xib.