If MyFramework contains Objective-C classes in its public headers (and the umbrella header), then
import MyFramework is all that's necessary to use them from Swift.
A bridging header makes additional Objective-C and C declarations visible to Swift code. When adding project files, Xcode may offer to create a bridging header automatically:
To create one manually, modify the Objective-C Bridging Header build setting:
Inside the bridging header, import whichever files are necessary to use from code:
// MyApp-Bridging-Header.h #import "MyClass.h" // allows code in this module to use MyClass
Click the Related Items button (or press ⌃1), then select Generated Interface to see the Swift interface that will be generated from an Objective-C header.