Publishing changes from within view updates is not allowed - SwiftUI with ARKit

Hello,

I’m encountering the error "Publishing changes from within view updates is not allowed, this will cause undefined behavior". while developing an app using SwiftUI and ARKit.

I have a ObjectTracking class where I update some @Published variables inside a function called processObjectAttributes after detecting objects. However, when I try to update these state variables in the View (like isPositionChecked, etc.), the error keeps appearing.

Here is a simplified version of my code:

class ObjectTracking: ObservableObject {

    @Published var isPositionChecked: Bool = false
    @Published var isSizeChecked: Bool = false
    @Published var isOrientationChecked: Bool = false

    func checkAttributes(objectAnchor: ARObjectAnchor,
                         _ left: ARObjectAnchor.AttributeLocation,
                         _ right: ARObjectAnchor.AttributeLocation? = nil,
                         threshold: Float) -> Bool {
        let attributes = objectAnchor.attributes
        guard let leftValue = attributes[left]?.floatValue else { return false }
        let rightValue = right != nil ? attributes[right!]?.floatValue ?? 0 : 0
        return leftValue > threshold && (right == nil || rightValue > threshold)
    }

    func isComplete(objectAnchor: ARObjectAnchor) -> Bool {
        isPositionChecked = checkAttributes(objectAnchor: objectAnchor, .positionLeft, .positionRight, threshold: 0.5)
        isSizeChecked = checkAttributes(objectAnchor: objectAnchor, .sizeLeft, .sizeRight, threshold: 0.3)
        isOrientationChecked = checkAttributes(objectAnchor: objectAnchor, .orientationLeft, .orientationRight, threshold: 0.3)
        
        return isPositionChecked && isSizeChecked && isOrientationChecked
    }

    func processObjectAttributes(objectAnchor: ARObjectAnchor) {
        currentObjectAnchor = objectAnchor
    }
}

In my View, I am using @ObservedObject to observe the state of these variables, but the error persists when I try to update them during view rendering.

Could anyone help me understand why this error occurs and how to avoid it? I understand that state should not be updated during view rendering, but I can’t find a solution that works in this case.

Thank you in advance for your help!