Release Notes for SwiftUI Tutorials

Question

OP

Apple

Created Jun ’19

Replies 5

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Participants 2

When browsing the new SwiftUI Tutorials in Xcode, please take note of the following items mentioned in the Xcode 11 Beta Release notes:

1. After following Section 7, Step 7 in the Building Lists and Navigation tutorial, you might encounter an error in your project’s

SceneDelegate.swift

file.

Workaround: Update line 14 of

SceneDelegate.swift

to use

LandmarkList

instead of

LandmarkDetail

:

window.rootViewController = UIHostingController(rootView: LandmarkList())

2. After following Section 5, Step 3 in the Handling User Input tutorial, you might encounter an error in the preview provider.

Workaround: Undo the change to the

LandmarkDetail

initializer, so that you only add the

environmentObject(_:)

modifier:

struct LandmarkDetail_Preview: PreviewProvider {
  static var previews: some View {
  LandmarkDetail(landmark: landmarkData[0])
  .environmentObject(UserData())
  }
}

The web version of the SwiftUI Tutorials has the correct steps.

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Answer 1

trafnar OP

Jun ’19

Just a small note: On section 7 step 2, I'm running into a problem. The tutorial says to write

Image(name: "turtlerock")

but Xcode tells me it should be

Image(systemName: "turtlerock")

0

Answer 2

trafnar OP

Jun ’19

I think I found a mistake in the project files for Handling User Input. The "Starting Point" files have the first step already completed. The tutorial says "add a star image inside an if statement..." but the star image in the if statement already exists in the file LandmarkRow.swift

0

Answer 3

trafnar OP

Jun ’19

While I'm providing feedback, I'd like to mention that if you have the tutorial open in a narrow browser window (where the layout changes to a single column) its very difficult to tell if the code sample has more changes than are visible in the first 5 lines. If changes happen throughout the file, its necessary to click the name of the file to see a full view of it. I found myself wondering where I went wrong before realizing I had to expand the code. This is noticable in "Responding to User Input" section 3 step 1.

0

Answer 4

trafnar OP

Jun ’19

There's a typo in "Handling User Input", "Create a Favorite Button for Each Landmark" step 3. It says "In LandmarList.swift, and turn on the live preview". I believe "and" wasn't meant to be there.

The video for this step isn't visible when the browser is narrow and the page goes into single column view.

0

Answer 5

trafnar OP

Jun ’19

The animating views and transitions tutorial “animate the effects of state changes” step 2 code has a missing { after “extension AnyTransition”

0