Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS

Posted by Josh Reynolds
Josh Reynolds
10,734 Points

Typecasting/ Downcasting help

Hi there,

I've been looking around and seeing some notes on Typecasting and Downcasting involving different classes. I'm completely new to programming and iOS dev and cannot get my head around these ideas.

How and where would this be used? Could anybody display some simple examples?

Thanks!

2 Answers

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Josh, if you haven't read through the Apple documentation on typecasting and downcasting you might give it a try:

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/TypeCasting.html

They have some good examples.

Josh Reynolds
Josh Reynolds
10,734 Points
Josh Reynolds
Josh Reynolds
10,734 Points

jcorum thanks, I did have a good look over this, I think I'm just struggling to see how it would be implemented in a real world example - due to only just learning the concept.