@brandonK212,
The ActivityViewContext is the context object passed inside the ActivityConfiguration for building your view bodies. The preview for a live activity is very different from previewing a widget. You have to create your attributes set and then request a preview on that instead. Here is a minimally required code snip to get you started.
Create custom Attributes
Create a widget that uses an ActivityConfiguration of your custom attributes
In your preview, instantiate an instance of your attributes and call .preview on it
As a note, you need your widget defined as main, or use a widget bundle. I originally missed this and nothing happened. Presumably, under the hood it will lookup which ActivityConfiguration to invoke, and thus which 'View' to finally instantiate for the preview.
https://developer.apple.com/documentation/widgetkit/activitypreviewviewkind
https://developer.apple.com/documentation/activitykit/activityattributes/previewcontext(_:isstale:viewkind:)
P.S. This is brand new with Xcode 14.2 and requires iOS 16.2 :)
@available(iOSApplicationExtension 16.1, *)
@main
struct LocationWidget: Widget {
var body: some WidgetConfiguration {
ActivityConfiguration(for: LocationAttributes.self) { context in
Text("You're at \(context.attributes.name)")
} dynamicIsland: { context in
DynamicIsland {
DynamicIslandExpandedRegion(.leading) {
Image(systemName: "mappin.circle")
.resizable()
.scaledToFit()
.frame(width: 32, height: 32)
}
DynamicIslandExpandedRegion(.center) {
VStack(alignment: .center) {
Text("You're visiting \(context.attributes.name)")
HStack {
Text("\(context.state.location.latitude), \(context.state.location.longitude)")
}
}
}
DynamicIslandExpandedRegion(.trailing) {
HStack {
Image(systemName: "hand.thumbsup.fill")
.resizable()
.scaledToFit()
.frame(width: 32, height: 32)
Image(systemName: "hand.thumbsdown")
.resizable()
.scaledToFit()
.frame(width: 32, height: 32)
}
}
DynamicIslandExpandedRegion(.bottom) {
Text("Enjoy your visit!")
}
} compactLeading: {
Text("Compact Leading")
} compactTrailing: {
Text("Compact Trailing")
} minimal: {
Text("Minimal")
}
}
}
}
struct LocationActivityView: View {
var body: some View {
Text("Hello Location")
}
}
struct LocationAttributes: ActivityAttributes {
struct ContentState: Codable, Hashable {
var location: Location
}
let name: String
}
struct Location: Codable, Hashable {
let latitude: Double
let longitude: Double
}
#if DEBUG
@available(iOSApplicationExtension 16.2, *)
struct LocationActivityView_Previews: PreviewProvider {
static var previews: some View {
Group {
LocationAttributes(name: "London Eye")
.previewContext(
LocationAttributes.ContentState(location: Location(latitude: 51.503351, longitude: -0.119623)),
viewKind: .content
)
LocationAttributes(name: "London Eye")
.previewContext(
LocationAttributes.ContentState(location: Location(latitude: 51.503351, longitude: -0.119623)),
viewKind: .dynamicIsland(.expanded)
)
}
}
}
#endif
I'm getting an error trying to attach the resulting preview screenshot but give it a run and check it out for yourself!
