Charts SwiftUI: Graph is not updated when @ObservedObject changes

SwiftUI: Graph is not updated when @ObservedObject changes

Open kdthomas2121 opened this issue 4 years ago • 3 comments

[x] I've read, understood, and done my best to follow the *CONTRIBUTING guidelines.

What did you do?

Create a graph inside a UIViewRepresentable with an @ObservedObject viewModel

Attempted the below update code, which does not work func updateUIView(_ uiView: LineChartView, context: UIViewRepresentableContext<LineChartSwiftUI>) { chart.data = addData() chart.data?.notifyDataChanged() chart.notifyDataSetChanged() chart.animate(xAxisDuration: 0.01) }

What did you expect to happen?

When the @Published data within the view model changes, the graph should reload

What happened instead?

Nothing

Charts Environment

Latest Xcode Version 12.2 SwiftUI Platform(s) running Charts: Big sur `struct LineChartSwiftUI: UIViewRepresentable { @ObservedObject var viewModel: viewModel

let chart = LineChartView()

func makeUIView(context: UIViewRepresentableContext<LineChartSwiftUI>) -> LineChartView { let chart = LineChartView() chart.data = addData() updateChart() } } `

Within my view:

case .loaded(let data): VStack { LineChartSwiftUI(viewModel: viewModel) }