Adopt and interoperate with Cocoa design patterns in your Swift apps.
Cocoa Design Patterns
Topics
Common Patterns
Using Key-Value Observing in Swift
Notify objects about changes to the properties of other objects.
Using Delegates to Customize Object Behavior
Respond to events on behalf of a delegator.
Managing a Shared Resource Using a Singleton
Provide access to a shared resource using a single, shared class instance.
About Imported Cocoa Error Parameters
Learn how Cocoa error parameters are converted to Swift throwing methods.
Handling Cocoa Errors in Swift
Throw and catch errors that use Cocoa's error types.
See Also
Language Interoperability
Objective-C and C Code Customization
Apply macros to your Objective-C APIs to customize how they're imported into Swift.
Migrating Your Objective-C Code to Swift
Learn the recommended steps to migrate your code.
Handling Dynamically Typed Methods and Objects in Swift
Cast instances of the Objective-C id type to a specific Swift type.
Using Objective-C Runtime Features in Swift
Use selectors and key paths to interact with dynamic Objective-C APIs.
Imported C and Objective-C APIs
Use native Swift syntax to interoperate with types and functions in C and Objective-C.