swift 値渡しがされない場合の解決方法
Xcodeでコレクションビューを使ったTODOアプリを作っています。
collectionViewのセルをロングタップすると入力画面に遷移し、次画面にて入力された内容をセル上のラベルにそれぞれ表示したいのですが値が渡らず困っています・・・。
NavigationControllerは使っておらず、segueにはpresentModallyを使っています。エラー等も出ていません。
何か解る方がいましたらご教授お願いしたいです。よろしくお願いします。
import UIKit
struct MyTodoItem {
var title: String
var dateString: String?
}
class ViewController: UIViewController,UICollectionViewDelegate,UICollectionViewDataSource,UIGestureRecognizerDelegate,nextViewControllerDelegate {
@IBOutlet weak var todoCollection: UICollectionView!
let toDos = ["１","２","３","４","５","６"]
var todos: [MyTodoItem] = [
MyTodoItem(title: "１", dateString: nil),
MyTodoItem(title: "２", dateString: nil),
MyTodoItem(title: "３", dateString: nil),
MyTodoItem(title: "４", dateString: nil),
MyTodoItem(title: "５", dateString: nil),
MyTodoItem(title: "６", dateString: nil),
]
override func viewDidLoad() {
super.viewDidLoad()
let layout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)
layout.itemSize = CGSize(width: 100,height: 100)
todoCollection.collectionViewLayout = layout
let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(cellLongPressed))
longPressGestureRecognizer.delegate = self
longPressGestureRecognizer.allowableMovement = 15
longPressGestureRecognizer.minimumPressDuration = 0.6
todoCollection.addGestureRecognizer(longPressGestureRecognizer)
}
func nextViewController(_ nextVC: NextViewController, didFinishText text: String?) {
if let editingItem = self.editingItem {
todos[editingItem].dateString = text
todoCollection.reloadItems(at: [IndexPath(item: editingItem, section: 0)])
}
}
//表示するセルの数
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 6
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
cell.backgroundColor = .systemPink
let item = todos[indexPath.row]
let todoLabel = cell.contentView.viewWithTag(1) as! UILabel
todoLabel.text = item.title
let dateLabel = cell.contentView.viewWithTag(2) as! UILabel
dateLabel.text = item.dateString
return cell
}
func collectionview(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let horizontalSpace : CGFloat = 20
let cellSize : CGFloat = self.view.bounds.width / 3 - horizontalSpace
return CGSize(width: cellSize, height: cellSize)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@objc func cellLongPressed(sender: UILongPressGestureRecognizer){
if sender.state == UIGestureRecognizer.State.began{
performSegue(withIdentifier: "next", sender: nil)
}
}
var editingItem: Int?
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let nextVC = segue.destination as! NextViewController
nextVC.delegate = self
}
}
import UIKit
protocol nextViewControllerDelegate {
func nextViewController(_ nextVC:NextViewController,didFinishText text: String?)
}
class NextViewController: UIViewController,UITextFieldDelegate {
//デートピッカー
var datePicker :UIDatePicker = UIDatePicker()
@IBOutlet weak var dayTextField: UITextField!
var delegate: nextViewControllerDelegate?
override func viewDidLoad() {
super.viewDidLoad()
//デートピッカー
datePicker.datePickerMode = UIDatePicker.Mode.date
datePicker.timeZone = NSTimeZone.local
datePicker.locale = Locale(identifier: "ja")
dayTextField.inputView = datePicker
//デートピッカーのツールバー関係
let toolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: view.frame.size.width, height: 35))
let spaceItem = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: self, action: #selector(done))
let doneItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(done)); toolBar.setItems([spaceItem,doneItem],animated: true)
dayTextField.inputView = datePicker
dayTextField.inputAccessoryView = toolBar
}
//デートピッカーを閉じるメソッド
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
//デートピッカーにdoneボタン
@ objc func done(){
dayTextField.endEditing(true)
let formatter = DateFormatter()
formatter.dateFormat = "yyyy年MM月dd日"
dayTextField.text = "\(formatter.string(from: datePicker.date))"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func addButton(_ sender: Any) {
delegate?.nextViewController(self, didFinishText: dayTextField.text)
self.dismiss(animated: true, completion: nil)
}
}
swift
import UIKit
struct MyTodoItem {
var title: String
var dateString: String?
}
class ViewController: UIViewController,UICollectionViewDelegate,UICollectionViewDataSource,UIGestureRecognizerDelegate,nextViewControllerDelegate {
@IBOutlet weak var babyImage: UIImageView!
@IBOutlet weak var todoCollection: UICollectionView!
let toDos = ["１","２","３","４","５","６"]
var todos: [MyTodoItem] = [
MyTodoItem(title: "１", dateString: nil),
MyTodoItem(title: "２", dateString: nil),
MyTodoItem(title: "３", dateString: nil),
MyTodoItem(title: "４", dateString: nil),
MyTodoItem(title: "５", dateString: nil),
MyTodoItem(title: "６", dateString: nil),
]
override func viewDidLoad() {
super.viewDidLoad()
let layout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)
layout.itemSize = CGSize(width: 100,height: 100)
todoCollection.collectionViewLayout = layout
let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(cellLongPressed))
longPressGestureRecognizer.delegate = self
longPressGestureRecognizer.allowableMovement = 15
longPressGestureRecognizer.minimumPressDuration = 0.6
todoCollection.addGestureRecognizer(longPressGestureRecognizer)
}
func nextViewController(_ nextVC: NextViewController, didFinishText text: String?) {
if let editingItem = self.editingItem {
todos[editingItem].dateString = text
todoCollection.reloadItems(at: [IndexPath(item: editingItem, section: 0)])
}
}
//表示するセルの数
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 6
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
//セルの色
cell.backgroundColor = .systemPink
let item = todos[indexPath.row]
let todoLabel = cell.contentView.viewWithTag(1) as! UILabel
todoLabel.text = item.title //<-
let dateLabel = cell.contentView.viewWithTag(2) as! UILabel
dateLabel.text = item.dateString//<-
return cell
}
func collectionview(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let horizontalSpace : CGFloat = 20
let cellSize : CGFloat = self.view.bounds.width / 3 - horizontalSpace
return CGSize(width: cellSize, height: cellSize)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@objc func cellLongPressed(sender: UILongPressGestureRecognizer){
if sender.state == UIGestureRecognizer.State.began{
performSegue(withIdentifier: "next", sender: nil)
}
}
var editingItem: Int?
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "next" {
let cell = sender as! UICollectionViewCell
if let indexPath = todoCollection.indexPath(for: cell) {
editingItem = indexPath.item
} else {
editingItem = nil
}
let nextVC = segue.destination as! NextViewController
nextVC.delegate = self
}
}
}