Why app archive failed with custom frameworks in iOS, swift, xcode 9.2

I'm creating an iOS app which use my own custom framework. Can build, run with real iOS devices & with simulators.

But if I try to Archive the project for App Store it gives me Error says :

the functions & classes are unresolved identifier

I have used so many third party frameworks (not the cocoa pods) (ex: facebook or any) and can user properly from build, run to archive. But why can't we use our own framework for archive.

NOTE: just drag and drop my custom framework to my iOS project and selected copy items if needed.

Any reason for this and how can I overcome this problem.

I found a way to do this. but there may be other ways as well. this is open to any answer.

I followed below steps :

• In your custom framework project ( cocoa touch framework project ) , select your Project in Targets.
• Then search for Skip install.
• Change it into NO.
• Then archive your custom framework. ( make sure to select Generic iOS Device ) as target device.
• Export it to where you want.
• Then use it with your project.

Hope this will help to you