You need to add the bridge title to your project. In this header, you import what you need in Swift, and then you do not need to import it anywhere. IBook using Swift and Obj-C has a very good explanation.
Actually, the Apple Swift blog has an explanation:
To be safe, all components of your application must be built with the same version of Xcode and the Swift compiler to ensure they work together.
You can find more information here .
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