Target Integrity issue when building in new XCode (12.3)

[quangctkm9207]

In the recent XCode version(12.3),
when you added the framework, and click Build or Run, the following issue might appear.
"Target Integrity: Building for iOS Simulator but the linked and embedded framework .... was built for iOS + iOS Simulator".

[quangctkm9207]

It looks like that Apple restricts the use of a "fat" framework, and forces to build an XCFramework instead.
You can solve this problem by simply setting Validate Workspace to Yes in the Build Settings tab.

References
https://stackoverflow.com/a/65306886/3415319