In the same module

Inside a module named “MyModule”, Xcode generates a header named MyModule-Swift.h which exposes public Swift classes to Objective-C. Import this header in order to use the Swift classes:

public

#import "MyApp-Swift.h"
#import <MyFramework/MyFramework-Swift.h>

Relevant build settings:

• Objective-C Generated Interface Header Name: controls the name of the generated Obj-C header.
• Install Objective-C Compatibility Header: whether the -Swift.h header should be a public header (for framework targets).

In another module

Using @import MyFramework; imports the whole module, including Obj-C interfaces to Swift classes (if the aforementioned build setting is enabled).