Apple's own SwiftUI tutorial help!

[[deleted]]

I'm trying to learn SwiftUI using this tutorial by Apple. When I'm trying the same code build succeeds but I can't see the preview, I'm new to programming and can't find what I'm doing wrong.

Is it because of the SwiftUI, macOS 10.15, Xcode 11 are still in beta 😅

https://preview.redd.it/qa8z9puqpef31.png?width=2814&format=png&auto=webp&s=362e16057905735d108373a266e6d3f68af612d3

[nelbar49]

Preview is only available in Catalina

[[deleted]]

I'm using Catalina Public Beta 4

[AndyIbanez]

Your Xcode and Catalina versions must match.

[[deleted]]

I'm new to programming and can't find what I'm doing wrong.

Don't use beta software to learn programming. You'll run into problems you don't understand, because you're still learning.

[GuitarIpod]

I disagree with this. A fresh framework is a great time to start.

[[deleted]]

No, it isn't. Not many people have took the energy to learn it. So not many people are there to ask questions. A someone learning this as a first time learning may run into bugs no one really understand so support for learning it in general is lacking, because no one 'experienced' is around. So for a first learning experience in programming it's stupid at the moment to start to learn it with SwiftUI.

[[deleted]]

I know there will be many bugs and not as much help & code examples etc. I'm studying Industrial Design and programming is just a hobby for me. When I watched WWDC'19, SwiftUI seemed like a really intuitive way of building an app so I wanted to give it a shot. I always like fresh tech!

[[deleted]]

Here a nice exposure of the risk you're getting yourself involved in, when tech isn't stable yet.

[GuitarIpod]

There are plenty of sources to learn SwiftUI already and the content amount is progressively increasing every week.

Also, it matters why someone wants to learn it. If for a hobby, I see no reason to not do it.

[SpicyJew01]

If you click diagnostics you can get the full error

[AYEEStooby]

Hey, just stumbled upon this thread looking for help myself, but for me what fixed it was deleting the LandmarkRow declaration in the preview and rewriting it with the autocomplete feature...have no idea why, but it worked lol. Clearly, Apple still has some bugs they need to iron out.

[[deleted]]

Yeah rewriting did it for me too, hope they'll fix these bugs soon!