struct ActivityAttribute: ActivityAttributes {
    
    public struct ContentState: Codable, Hashable {
        
        // Dynamic properties.
        // Can be updated when Live Actvity created.
        
        var dynamicStringValue: String
        var dynamicIntValue: Int
        var dynamicBoolValue: Bool
        
    }
    
    // Static properties.
    // Used only when make live actvity.
    // Can't update it later.
    
    var staticStringValue: String
    var staticIntValue: Int
    var staticBoolValue: Bool
}

struct LiveActivityWidget: Widget {
    
    let kind: String = "LiveActivityWidget"
    
    var body: some WidgetConfiguration {
        ActivityConfiguration(for: ActivityAttribute.self) { context in
            // UI for lock screen
        } dynamicIsland: { context in
            // UI for Dynamic Island
        }
    }
}