Developer environment: Xcode 9.0
problem:
When I release the left mouse button, the selected state of the code will be canceled.
I upgraded my Xcode to version 9.1, not solve.
Developer environment: Xcode 9.0
problem:
When I release the left mouse button, the selected state of the code will be canceled.
I upgraded my Xcode to version 9.1, not solve.
It seems that a specific version of Appstore's history is not compatible with Mac OS. I upgrade macos version ,then everything is ok.