import SwiftUI

struct ContentView: View {
    @State private var isShowRefresh = false
    
    var body: some View {
        List {
            // ...
        }
        .pullToRefresh(isShowing: $isShowRefresh, deadline: 2) {
            // Your update logic is here...
            
            isShowRefresh = false
        }
    }
}

import SwiftUI

struct ContentView: View {
    @StateObject private var viewModel = ViewModel()
    
    var body: some View {
        List {
            // ...
        }
        .pullToRefresh(isShowing: $viewModel.isShowRefresh) {
            viewModel.refresh()
        }
    }
}

import Foundation

class ViewModel: ObservableObject {
    @Published var isShowRefresh = false
    
    func refresh() {
        // Your update logic is here...
        
        isShowRefresh = false
    }
}