Passing an array to another view SwiftUI

Question

I am trying to pass an array to another view. I want to pass the array simulation to operating conditions view.

@State var simulation = [Any]()

I know you can not see all the code but below is where if a button is pressed to show the operating conditions view and pass in an array after the array is loaded with data I have checked to make sure Simulation array does have values in it before passing and it does.

.sheet(isPresented: $showingOperatingConditions) {
            OperatingConditionsView(threats: simulation)
        }

Here is the operating conditions view where threats is declared. For some reason, the array is empty every time I load the view. Can anybody help?

struct OperatingConditionsView: View {


    @State public var threats = [Any]()

}

Perhaps declare the simulation @ State and then define it in the sheet view as @ binding and then pass it with $simulation? — sheldor
– sheldor, Commented May 16, 2021 at 17:59
Change from @State to @Binding if you are going to change the array otherwise just remove @State. Off topic but why is the array declared as [Any]? — Joakim Danielson
– Joakim Danielson, Commented May 16, 2021 at 18:01
@sheldor it is giving me errors when I change this.. I may be doing it wrong. Can you reply with a visual answer? — Luke Tomlinson
– Luke Tomlinson, Commented May 16, 2021 at 18:09
Don’t know if it is allowed here, but can I get an upvote for the reply please, because I really need this for the next step, thank you :) — sheldor
– sheldor, Commented May 16, 2021 at 20:22

aheze · Accepted Answer · 2021-05-16 18:13:49Z

2

As the comments said, you want to change OperatingConditionsView's threats into a @Binding. You'll then need to pass in $simulation with a $ (gets its Binding).

.sheet(isPresented: $showingOperatingConditions) {
    OperatingConditionsView(threats: $simulation) /// need a $ here
}

struct OperatingConditionsView: View {
    @Binding public var threats: [Any] /// don't initialize with default value
}

Alternatively, if you don't need changes in threats to auto-update simulation, you can go with a plain, non-binding property as @Joakim Danielson's comment said.

.sheet(isPresented: $showingOperatingConditions) {
    OperatingConditionsView(threats: simulation)
}

struct OperatingConditionsView: View {
    public var threats: [Any]
}

answered May 16, 2021 at 18:13

aheze

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