iOS Swift Basics Tutorial: Protocols and Delegates

In this tutorial you are going to learn how to use the Delegation design pattern in your apps. A common usecase is transferring data from one ViewController to another.

***COMMENTS****
If you have questions about the video or Cocoa programming. Please comment below.

[alecsaunders]

Brian, I have read, and seen heaps of tutorials about custom protocols/delegates, and this is the first one that actually makes sense. The syntax is a little out of date, but it was still super easy to follow along and understand! Thank you!

[nactd]

Hey man great tutorial, straight to the point, no garbage. I have been trying to find a simple tutorial on how to use delegation and almost everyone fails at it.

[AAKhanivore]

I have been going round in circles trying to get this right. You just helped me greatly! Thanks :) Keep up the good work.

[marcellygodinho]

Thank you so much, Brian! I've spent all day trying to share data between my controllers and now finally worked like a charm. I really appreciate that!! Awesome tutorial! Best from Brazil. :)

[BenWinters]

This was super helpful. I had been missing secondViewController.delegate = self in my project, but all is well now. Thanks!

[marting]

Though I'm learning Swift5, I find your explanation highly relevant. Thank you for the video.

[sreekanthp]

Thanks Brian . Simple and understandable tutorial, thanks for the video.

[commentguy]

Brian. You've got great tutorials but I really wish you would refrain from using so much Objective C syntax in your code (e.g. Use of NSString instead of String and NSMutable Arrays etc.). I'm really trying to clear my head of Objective C and you keep bringing it back. Can you keep these tutorials as pure to Swift as possible? That make for a really fantastic course.

[bennychewDev]

Thanks a lot for this video! I was struggling to understand the concept of delegation and this video really helped.

[sminkly]

Hi. Thanks for tutorials Brian. A question though. Why use a delegate instead of just unwinding the segue ?

[robertmcginn]

Great video, I've been trying to figure protocols and delegates out and this helped a bunch! Keep it up!!

[mariodiaz]

Thanks Brian Advent your videos are great. Keep them coming!

[Pedruchito]

Thank you for the video, I'm really stupid and you explain it slowly with indications 👍

[drfalcoew]

Wow, only if I new this so long ago.. thanks a lot for the video

[doanntuann]

Thank Brian Advent so so much !
But you can help me know that I should watch your videos first and next. A basically for beginners like me

[yevheniitechnologic]

Thank you a lot for clear explanation!

[marcospeziali]

First of all: great tutorial! :)
I have a question, probably is more a tutorial request..
In Objective C I used to create blocks in parallel with delegates.
But now in Swift I don't know how to do that. May you do a tutorial about blocks (closures) in Swift?

P.S. With blocks parallel to delegates I mean this:
[myObject setCompletionBlock:]

Thank you in advance!

[TheBinary]

Thank you so much ... you the man. Keep it up. Very much helpful..!!

[Twiggen]

Great tutorial - Bang on the money!
Cheers!

[cupham]

Thank you for great tutorial, I help me so much!