第十三天:SwiftTodo

Posted 2020-10-26 CHM

 

参考链接:https://github.com/soapyigu/Swift-30-Projects

 

 1 import UIKit
 2 
 3 class ToDoItem: NSObject {
 4     var id: String
 5     var image: String
 6     var title: String
 7     var date: Date
 8     
 9     init(id: String, image: String, title: String, date: Date) {
10         self.id = id
11         self.image = image
12         self.title = title
13         self.date = date
14     }
15 }

 

 1 import Foundation
 2 
 3 func dateFromString(_ date: String) -> Date? {
 4     let dateFormatter = DateFormatter()
 5     dateFormatter.dateFormat = "yyyy-MM-dd"
 6     
 7     return dateFormatter.date(from: date)
 8 }
 9 
10 func stringFromDate(_ date: Date) -> String {
11     let dateFormatter = DateFormatter()
12     dateFormatter.dateFormat = "yyyy-MM-dd"
13     
14     return dateFormatter.string(from: date)
15 }

 

  1 import UIKit
  2 
  3 var todos: [ToDoItem] = []
  4 
  5 class ViewController: UIViewController {
  6 
  7     @IBOutlet weak var todoTableView: UITableView!
  8     
  9     override func viewDidLoad() {
 10         super.viewDidLoad()
 11         // Do any additional setup after loading the view, typically from a nib.
 12         
 13         navigationItem.leftBarButtonItem = editButtonItem
 14         
 15         todos = [ToDoItem(id: "1", image: "child-selected", title: "Go to Disney", date: dateFromString("2014-10-20")!),
 16         ToDoItem(id: "2", image: "shopping-cart-selected", title: "Cicso shopping", date: dateFromString("2014-10-28")!),
 17         ToDoItem(id: "3", image: "phone-selected", title: "Phone to Jobs", date: dateFromString("2014-10-30")!),
 18         ToDoItem(id: "4", image: "travel-selected", title: "Plan to Europe", date: dateFromString("2014-10-31")!)]
 19     }
 20 
 21     override func viewWillAppear(_ animated: Bool) {
 22         super.viewWillAppear(animated)
 23         todoTableView.reloadData()
 24     }
 25     
 26     // MARK - helper func
 27     func setMessageLabel(_ messageLabel: UILabel, frame: CGRect, text: String, textColor: UIColor, numberOfLines: Int, textAlignment: NSTextAlignment, font: UIFont) {
 28         messageLabel.frame = frame
 29         messageLabel.text = text
 30         messageLabel.textColor = textColor
 31         messageLabel.numberOfLines = numberOfLines
 32         messageLabel.textAlignment = textAlignment
 33         messageLabel.font = font
 34         messageLabel.sizeToFit()
 35     }
 36     
 37     func setCellWithTodoItem(_ cell: UITableViewCell, todo: ToDoItem) {
 38         let imageView: UIImageView = cell.viewWithTag(11) as! UIImageView
 39         let titleLabel: UILabel = cell.viewWithTag(12) as! UILabel
 40         let dateLabel: UILabel = cell.viewWithTag(13) as! UILabel
 41         
 42         imageView.image = UIImage.init(named: todo.image)
 43         titleLabel.text = todo.title
 44         dateLabel.text = stringFromDate(todo.date)
 45     }
 46     
 47     override func didReceiveMemoryWarning() {
 48         super.didReceiveMemoryWarning()
 49         // Dispose of any resources that can be recreated.
 50     }
 51 
 52     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 53         if segue.identifier == "editTodo" {
 54             let vc = segue.destination as! DetailViewController
 55             let indexPath = todoTableView.indexPathForSelectedRow
 56             if let indexPath = indexPath {
 57                 vc.todo = todos[(indexPath as NSIndexPath).row]
 58             }
 59         }
 60     }
 61 
 62 }
 63 
 64 extension ViewController: UITableViewDataSource {
 65     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
 66         if todos.count != 0 {
 67             return todos.count
 68         } else {
 69             let messageLabel: UILabel = UILabel()
 70             
 71             setMessageLabel(messageLabel, frame: CGRect(x: 0, y: 0, width: self.view.bounds.size.width, height: self.view.bounds.size.height), text: "No data is currently available.", textColor: UIColor.black, numberOfLines: 0, textAlignment: NSTextAlignment.center, font: UIFont(name: "Palatino-Italic", size: 20)!)
 72             
 73             self.todoTableView.backgroundView = messageLabel
 74             self.todoTableView.separatorStyle = UITableViewCellSeparatorStyle.none
 75             
 76             return 0
 77         }
 78     }
 79     
 80     func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
 81         let cellIdentifier: String = "todoCell"
 82         let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath)
 83         
 84         setCellWithTodoItem(cell, todo: todos[(indexPath as NSIndexPath).row])
 85         
 86         return cell
 87     }
 88 }
 89 
 90 extension ViewController: UITableViewDelegate {
 91     // Edit Mode
 92     override func setEditing(_ editing: Bool, animated: Bool) {
 93         super.setEditing(editing, animated: animated)
 94         todoTableView.setEditing(editing, animated: true)
 95     }
 96     
 97     // Delete the cell
 98     func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
 99         if editingStyle == UITableViewCellEditingStyle.delete {
100             todos.remove(at: (indexPath as NSIndexPath).row)
101             todoTableView.deleteRows(at: [indexPath], with: UITableViewRowAnimation.automatic)
102         }
103     }
104     
105     // Move the cell
106     func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
107         return self.isEditing
108     }
109     
110     func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
111         let todo = todos.remove(at: (sourceIndexPath as NSIndexPath).row)
112         todos.insert(todo, at: (destinationIndexPath as NSIndexPath).row)
113     }
114 }

 

  1 import UIKit
  2 
  3 class DetailViewController: UIViewController {
  4 
  5     @IBOutlet weak var childButton: UIButton!
  6     @IBOutlet weak var phonebutton: UIButton!
  7     @IBOutlet weak var shoppingCartButton: UIButton!
  8     @IBOutlet weak var travelButton: UIButton!
  9     @IBOutlet weak var todoTitleLabel: UITextField!
 10     @IBOutlet weak var todoDatePicker: UIDatePicker!
 11     
 12     var todo: ToDoItem?
 13     
 14     override func viewDidLoad() {
 15         super.viewDidLoad()
 16 
 17         // Do any additional setup after loading the view.
 18         
 19         if let todo = todo {
 20             self.title = "Edit Todo"
 21             if todo.image == "child-selected" {
 22                 childButton.isSelected = true
 23             } else if todo.image == "phone-selected" {
 24                 phonebutton.isSelected = true
 25             } else if todo.image == "shopping-cart-selected" {
 26                 shoppingCartButton.isSelected = true
 27             } else if todo.image == "travel-selected" {
 28                 travelButton.isSelected = true
 29             }
 30             
 31             todoTitleLabel.text = todo.title
 32             todoDatePicker.setDate(todo.date, animated: false)
 33         } else {
 34             title = "New Todo"
 35             childButton.isSelected = true
 36         }
 37     }
 38     
 39     // MARK: type select
 40     @IBAction func selectChild(_ sender: AnyObject) {
 41         resetButtons()
 42         childButton.isSelected = true
 43     }
 44     
 45     @IBAction func selectPhone(_ sender: AnyObject) {
 46         resetButtons()
 47         phonebutton.isSelected = true
 48     }
 49     
 50     @IBAction func selectShoppingCart(_ sender: AnyObject) {
 51         resetButtons()
 52         shoppingCartButton.isSelected = true
 53     }
 54     
 55     @IBAction func selectTravel(_ sender: AnyObject) {
 56         resetButtons()
 57         travelButton.isSelected = true
 58     }
 59     
 60     func resetButtons() {
 61         childButton.isSelected = false
 62         phonebutton.isSelected = false
 63         shoppingCartButton.isSelected = false
 64         travelButton.isSelected = false
 65     }
 66     
 67     // MARK: create or edit a new todo
 68     @IBAction func tapDone(_ sender: AnyObject) {
 69         var image = ""
 70         
 71         if childButton.isSelected {
 72             image = "child-selected"
 73         } else if phonebutton.isSelected {
 74             image = "phone-selected"
 75         } else if shoppingCartButton.isSelected {
 76             image = "shopping-cart-selected"
 77         } else if travelButton.isSelected {
 78             image = "travel-selected"
 79         }
 80         
 81         if let todo = todo {
 82             todo.image = image
 83             todo.title = todoTitleLabel.text!
 84             todo.date = todoDatePicker.date
 85         } else {
 86             let uuid = UUID().uuidString
 87             todo = ToDoItem(id: uuid, image: image, title: todoTitleLabel.text!, date: todoDatePicker.date)
 88             todos.append(todo!)
 89         }
 90         
 91         let _ = navigationController?.popToRootViewController(animated: true)
 92     }
 93     
 94     override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
 95         super.touchesBegan(touches, with: event)
 96         view.endEditing(true)
 97     }
 98 
 99     override func didReceiveMemoryWarning() {
100         super.didReceiveMemoryWarning()
101         // Dispose of any resources that can be recreated.
102     }
103     
104     /*
105     // MARK: - Navigation
106 
107     // In a storyboard-based application, you will often want to do a little preparation before navigation
108     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
109         // Get the new view controller using segue.destinationViewController.
110         // Pass the selected object to the new view controller.
111     }
112     */
113 
114 }