Join Scott Gardner for an in-depth discussion in this video Work with protocol types, part of Swift 3 Essential Training: Beyond the Basics.
- [Instructor] I'm starting out with a modified version…of the exercise file from the previous video.…I've modified the BluRay type…to adopt and conform to Purchasable and Ratable,…and added runtime and runtimeString properties,…along with another number formatter…to format the runtime as hours, minutes, and seconds.…I've also created a BluRay instance…and added some ratings to it and printed it out.…This is all very similar to what I did with book previously,…nothing really new here.…Oh, and I also moved the currency formatter…I defined in the book class to the global scope,…so that I can use it in the BluRay class too.…
What I do want to show you…is how you can work with the instances…of different concrete types…that conform to the same protocol…as if they were all concrete instances…of that protocol type.…I'll create a cart array of Purchasable,…holding both the book and bluRay instances.…A protocol type can be used as a collection type,…which allows for collecting multiple concrete types…that adopt the protocol's requirements.…
- Adding source files, resources, links, and literals
- Adding pages to a playground
- Using overflow operators and bitwise operators
- Using ranges with strings
- Creating complex sequences
- Chaining higher-order functions
- Defining lazy properties
- Using failable initializers
- Mutating methods
- Working with singletons
- Nesting function types
- Creating error types and recursive enumerations
- Extending concrete types
- Referencing selectors and key paths
- Working with protocol-oriented programming
- Defining class-only protocols and optional protocols
- Using option sets, type checking, and casting operators
Skill Level Intermediate
Core Data for iOS and macOS Enterprise Developerswith Jon Bott1h 46m Intermediate
Distributing Your iOS App for Testing with TestFlightwith Ron Buencamino35m 10s Intermediate
iOS App Development: Test-Driven Developmentwith Harrison Ferrone2h 14m Intermediate
3. Strings and Characters
4. Sequences and Collections
5. Control Flow
6. Value and Reference Types
9. Access Control
Understand access control3m 47s
Next steps1m 2s
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