SWIFTUI TextView with real-time, programmatically-appendable text - ios

Question

I'm looking for a way to create a simple textview (command line like) that will show the user what is going on inside the app. It should be able to append elements programmatically in real time so user can monitor and copy text from it. Im writing app for macOS.
So far i done this:
class OutputElementStruct: Identifiable
{
var HEX: String
var Balance: String
init(HEX: String, Balance: String)
{
self.HEX = HEX
self.Balance = Balance
}
}
class OutputElements: ObservableObject
{
#Published var OutputElement = [OutputElementStruct]()
init()
{
self.OutputElement =
[
OutputElementStruct(HEX: "sometext", Balance: "sometext")
]
}
}
Then it shows to user
struct OutputView: View
{
#StateObject var OutputArray = OutputElements()
var body: some View
{
GeometryReader
{ Geo in
ZStack
{
BoxView(width: 600, height: 700, Name: "")
VStack
{
List
{
ForEach($OutputArray.OutputElement)
{ item in
Text(verbatim: item.HEX.wrappedValue)
}
}
}
}
}
.frame(width: 600, height: 700, alignment: .center)
}
}
and here is data added.
#StateObject var OutputArray = OutputElements()
.onTapGesture
{
print("button tapped")
OutputArray.OutputElement.append(OutputElementStruct(HEX: "sometext", Balance: "sometext"))
}
It is working, but not in real time. While i tapped the button it is prints "button tapped" in Xcode, but text view does not displays anything except firstly added item in init(). So how to make it work?

Answer 1

While i tapped the button it is prints "button tapped" in Xcode, but text view does not displays anything except firstly added item in init(). So how to make it work?
It looks like you've got two separate arrays that are both named OutputArray, and the one you're appending objects to isn't the one that your view is displaying. That's why you don't see any new objects show up even though you know you're adding them.
You need a single array that's used in both places. I think you've got the right idea by using #StateObject, but instead of creating two #StateObject variables, create just one and add it to the environment as explained in the StateObject documentation.