Both your JSON and code are not valid, you should better show the right things for readers not to be confused. Have you tried to make it a computed property? struct ProductModel: Identifiable, Codable, Hashable { var id: Int {productId} var productId: Int var name: String }

CATransaction.begin() and CATransaction.commit() should be paired. Have you tried using 4 pairs of CATransaction.begin() and CATransaction.commit() for each stroke? By the way, Vision does not seem to be the right tag for your question. You are not using Vision framework, are you?

I am not sure if this is sort of a bug or not, but you can send a bug report when you find some code once was working does not run in the latest beta.

Missing argument for parameter 'from' in call That happens when a proper initializer is not defined in ProductModel. If you cannot solve it by yourself, please show the definition of ProductModel.

Where is the definition of SecondView? When you show your code, you should better show whole code together. Whether your code works or not depends on other parts of your code.

Sometimes, Xcode might pick us some old errors and show them. Please try Clean Build Folder or restarting Xcode or restarting your mac and see what happens.

Apple's platforms do not support such looping picker. You can find some articles or repositories implementing pseudo infinite picker searching with "ios infinite picker".

I have downloaded your GitHub project and tried to build it, and showed Succeeded. Some classes (not structs) representing Core Data entity are generated dynamically. So, some errors might be shown until the classes are acknowledged by the editing support. You can try Building the project (Cmd+B) even when some errors are still shown.

As far as I tried, it compiles without any problems with Xcode 12.5.1 on Intel Mac mini (2018). So, it might be the M1 Mac only issue and you should better send a bug report soon. The official documentation of systemThickMaterial does not have any descriptions about unavailability on M1 Mac.

One possible interpretation is that the device is showing a different value only when connected to iOS device. What does that characteristic mean?

What do you mean by like this? As far as I see the code-like things in your post, Swift would never be like this, in my opinion.

want to try for next year swift student challenge The details of Swift Student Challenge would change the next year. You can check the details of this year and keep an eye on the coming announcements for WWDC 22. News and Updates would be one place you should better watch. And if you have not yet enabled emails from Apple on your Developer Account, you should better enable it. Installing Developer app will bring you many news as fast as many other sources.

Your code causes bunch of errors -- Cannot find type 'Villager' in scope, Expected '}' in struct or Failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project. And if I fix one error, many other errors generated. Please show enough code which can reproduce the error Initializer 'init(_:)' requires that 'Villager' conform to 'StringProtocol'. Please do not forget to use Code Block when you show some code.

Seems the value generated by next() needs to be large enough in the current implementation of random(in:using:). (randomElement(using:) may very probably be using the similar method internally.) class MockRandomNumberGenerator: RandomNumberGenerator { var current: UInt64 = 0 func next() -> UInt64 { defer { current += 1 } return current &* (UInt64.max/10) } } The header doc says Each call to next() must produce a uniform and independent random value. You may need to generate seemingly uniform values to make future algorithms of random(in:using:) work as you expect.

Can you clarify what you mean by even if the application is closed? When the application is closed, no collection view is shown so scroll automatically does not make sense.