Any application that uses a framework is going to need to be notified when things happen. As you make your camera framework, you need to set up a delegate so that the application can be aware of events that the camera performs. The best part of this is that you likely already know how to do it.
- [Narrator] Now let's talk about how to handle…events that occur inside of your framework.…If you've worked with IOS Development to this point,…it's very likely that you've encountered…the use of a delegate,…which gives you the functionality…to call back to one object from another.…We're going to follow the same kind of logic here…by implementing a delegate that's inside…of your camera controller to call back…to the application using your framework.…Go to the line that says import AV Foundation.…Hit return, and underneath it type public protocol,…camera, controller, delegate.…
You'll notice that we specified it to be public…so that the application that uses this framework…has access to this protocol.…We're going to type one function…called func, cancel, button, tapped,…and the parameter will pass in is the controller…on which the cancel button was tapped.…Think about the use case here.…When we're dealing with a cancel button being tapped,…you need to make sure that that's a button occurs on the UI,…and you want to have custom logic…
Along the way, he explains the differences and nuances between writing code for an application and for a reusable framework, as well as some of the fundamentals of AVFoundation, one of the core camera frameworks in iOS. David also shows how to refactor your code, understand Swift access control, develop an interface, and handle memory leaks, so your framework is ready to share with other developers.
- Creating your first build
- Making the camera work
- Creating a framework delegate
- Adding media
- Capturing images
- Correcting orientation
- Versioning and tagging releases in Git
Skill Level Intermediate
Learning Server-Side Swift with Vaporwith Ron Buencamino1h 30m Intermediate
Swift 4: Protocol-Oriented Programmingwith Károly Nyisztor1h 44m Intermediate
1. Let's Make It Work
2. Let's Keep It Clean
3. Putting It All Together
4. Track It
Tagging releases in Git2m 36s
Next steps1m 47s
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