Initialising array of array

[johnny1]

There's two problems here - one Swift and one SwiftUI.

Your SwiftUI problem is that your @State's initalValue should be a constant:

Default init internal needs a workaround. Enough is enough

Any consistent behavior you see is an accident. @State's initial value must be independent of any instance of the view. Chances are good this will be enforced at compile time when the necessary property wrapper functionality exists to do so.

The Swift problem (the reason it won't compile) is this line:

_selectedSoilTypes[bore] = State(initialValue: ...)

Before you assign a value to the _selectedSoilTypes array at an index, you need to initialize the _selectedSoilTypes array.

So you’d need a line like this to satisfy the compiler:

// This will compile but still has the SwiftUI problem

_selectedSoilTypes = State(initalValue: ...)

Only after you give the array a value can you assign to the indices. But again, even it you get it to compile with this method the UI will not work correctly - you shouldn't assign the @State's initialValue in your init. I'm not sure exactly what you're trying to do here without more context so I'm not sure what to suggest instead.