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| import UIKit
class TodoListViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
private var viewModel: TodoListViewModel!
private var cancellables = Set<AnyCancellable>()
override func viewDidLoad() {
super.viewDidLoad()
setupViewModel()
setupTableView()
setupNavigationBar()
}
private func setupViewModel() {
let context = (UIApplication.shared.delegate as! AppDelegate)
.persistentContainer.viewContext
viewModel = TodoListViewModel(context: context)
viewModel.$todos
.receive(on: DispatchQueue.main)
.sink { [weak self] _ in
self?.tableView.reloadData()
}
.store(in: &cancellables)
}
private func setupTableView() {
tableView.delegate = self
tableView.dataSource = self
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
}
private func setupNavigationBar() {
title = "待办事项"
navigationItem.rightBarButtonItem = UIBarButtonItem(
barButtonSystemItem: .add,
target: self,
action: #selector(addTodo)
)
}
@objc private func addTodo() {
let alert = UIAlertController(title: "新任务", message: nil, preferredStyle: .alert)
alert.addTextField { textField in
textField.placeholder = "输入任务内容"
}
let addAction = UIAlertAction(title: "添加", style: .default) { [weak self] _ in
guard let text = alert.textFields?.first?.text, !text.isEmpty else { return }
self?.viewModel.addTodo(title: text)
}
alert.addAction(addAction)
alert.addAction(UIAlertAction(title: "取消", style: .cancel))
present(alert, animated: true)
}
}
extension TodoListViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return viewModel.todos.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let todo = viewModel.todos[indexPath.row]
cell.textLabel?.text = todo.title
cell.accessoryType = todo.isCompleted ? .checkmark : .none
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let todo = viewModel.todos[indexPath.row]
viewModel.toggleComplete(todo)
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
let todo = viewModel.todos[indexPath.row]
viewModel.deleteTodo(todo)
}
}
}
|
