質問編集履歴
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【Swift】
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【Swift】Delegateがうまく機能しません
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@@ -1,141 +1,44 @@
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初めて質問させていただきます。
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遷移先のViewのCollectionViewのCellに入っているそれぞれのImageViewを押したら遷移元のViewに戻り遷移元のImageViewに選んだ画像が反映されるようにしたいです。
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delegateを使って実装しようとしましたがうまくできませんでした。
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アプリ自体はStudyPlusのようなアプリをイメージしています。
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### 遷移元のソースコード
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```Swift
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import UIKit
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class addMaterialViewController:UIViewController{
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@IBOutlet weak var addImageStackView: UIStackView!
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@IBOutlet weak var addMaterialImageView: UIImageView!//ここに選択された画像を表示したい
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@IBOutlet weak var materialName: UITextField!
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@IBAction func tappedMaterialName(_ sender: Any) {
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}
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@IBOutlet weak var addCategory: UIStackView!
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override func viewDidLoad() {
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super.viewDidLoad()
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materialName.delegate = self
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//stackViewがタップされた時に処理を実行
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let tapGestrureRecognizer = UITapGestureRecognizer(target: self, action: #selector(tappedStackView))
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self.addImageStackView.addGestureRecognizer(tapGestrureRecognizer)
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protocol didChoiseMaterialDelegate {
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//stackViewがタップされた時の処理
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func changeImage()
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let iconChoice = UIAlertAction(title: "アイコンから選択", style: .default, handler: {(action:UIAlertAction!) -> Void in
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print("アイコンから選択します")
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let storyboard = UIStoryboard(name: "choiseIcons", bundle: nil)
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let choiseIconsViewController = storyboard.instantiateViewController(withIdentifier: "choiseIconsViewController") as! choiseIconsViewController
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let nav = UINavigationController(rootViewController: choiseIconsViewController)
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nav.modalTransitionStyle = .coverVertical
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選択画面に遷移
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self.present(nav, animated: false, completion: nil)
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//画面遷移を横からに変更
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let transition = CATransition()
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transition.duration = 0.25
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transition.type = CATransitionType.push
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transition.subtype = CATransitionSubtype.fromRight
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self.view.window!.layer.add(transition, forKey: kCATransition)
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})
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let TakeChoise = UIAlertAction(title: "写真を撮る", style: .default, handler: {(action:UIAlertAction!) -> Void in
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print("写真を撮ります")
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})
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let LibraryChoise = UIAlertAction(title: "ライブラリから選択", style: .default, handler: {(action:UIAlertAction) -> Void in
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print("ライブラリから選択します")
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})
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let cancel = UIAlertAction(title: "キャンセル", style: .cancel, handler: {(action:UIAlertAction!) -> Void in
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print("キャンセルします")
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choiseIamgeTypeAlert.dismiss(animated: false, completion: nil)
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})
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choiseIamgeTypeAlert.addAction(iconChoice)
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choiseIamgeTypeAlert.addAction(TakeChoise)
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choiseIamgeTypeAlert.addAction(LibraryChoise)
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choiseIamgeTypeAlert.addAction(cancel)
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self.present(choiseIamgeTypeAlert, animated: true, completion: nil)
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}
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}
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```
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### 遷移先のソースコード
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```Swift
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import UIKit
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class choiseIconsViewController: UIViewController
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class choiseIconsViewController: UIViewController{
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private let cellId = "cellId"
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let icons = ["tb01","tb02","tb03","tb04","tb05","tb06","tb07","tb08","tb09","tb10","tb11","tb12","tb13","tb14","tb15","tb16","tb17","pr01","pr02","pr03","pr04","pr05","pr06","pr07","pr08","pr09","pr10","pr11","pr12","pr13","pr14","pr15"]
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var delegate: didChoiseMaterialDelegate?
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〜省略〜
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override func viewDidLoad() {
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super.viewDidLoad()
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iconsCollection.delegate = self
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iconsCollection.dataSource = self
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title = "アイコンから選択"
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let backButtonItem = UIBarButtonItem(title: "戻る", style: .plain, target: self, action: #selector(tappedBack))
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let appDlegate:AppDelegate = UIApplication.shared.delegate as! AppDelegate
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}
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//戻るボタンを押した時の処理
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@objc func tappedBack() {
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self.dismiss(animated: false, completion: nil)
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let transition = CATransition()
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transition.duration = 0.25
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transition.type = CATransitionType.push
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transition.subtype = CATransitionSubtype.fromLeft
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self.view.window!.layer.add(transition, forKey: kCATransition)
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}
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}
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extension choiseIconsViewController: UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout {
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//cellが押された時の処理
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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self.delegate?.changeImage()
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self.dismiss(animated: false, completion: nil)
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let transition = CATransition()
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transition.duration = 0.25
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transition.type = CATransitionType.push
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transition.subtype = CATransitionSubtype.fromLeft
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self.view.window!.layer.add(transition, forKey: kCATransition)
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}
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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return icons.count
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}
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//各CollectionViewのcellが押された時の処理
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func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
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let cell:UICollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath)
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@@ -145,47 +48,58 @@
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let resizedImage = cellImage?.resized(withPercentage: 0.05)//画像のデータサイズを縮小
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imageView.image = resizedImage
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appDlegate.iconImage = imageView.image
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return cell
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}
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〜省略〜
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}
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```
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151
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-
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59
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### 遷移先のソースコード
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60
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+
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61
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```Swift
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62
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import UIKit
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63
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152
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-
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class addMaterialViewController:UIViewController,didChoiseMaterialDelegate{
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let appDelegate:AppDelegate = UIApplication.shared.delegate as! AppDelegate
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@IBOutlet weak var addImageStackView: UIStackView!
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@IBOutlet weak var addMaterialImageView: UIImageView!
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@IBOutlet weak var materialName: UITextField!
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@IBAction func tappedMaterialName(_ sender: Any) {
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return CGSize(width: 20, height: 40)
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}
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@IBOutlet weak var addCategory: UIStackView!
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override func viewDidLoad() {
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func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
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super.viewDidLoad()
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materialName.delegate = self
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//stackViewがタップされた時に処理を実行
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let tapGestrureRecognizer = UITapGestureRecognizer(target: self, action: #selector(tappedStackView))
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self.addImageStackView.addGestureRecognizer(tapGestrureRecognizer)
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addMaterialImageView.image = appDelegate.iconImage
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}
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func changeImage() {
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func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
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print("success")
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addMaterialImageView.image = appDelegate.iconImage
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}
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func numberOfSections(in collectionView: UICollectionView) -> Int {
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〜省略〜
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}
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}
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extension UIImage {
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func resized(withPercentage percentage: CGFloat) -> UIImage? {
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let canvas = CGSize(width: size.width * percentage, height: size.height * percentage)
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return UIGraphicsImageRenderer(size: canvas, format: imageRendererFormat).image {
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_ in draw(in: CGRect(origin: .zero, size: canvas))
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}
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}
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}
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```
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186
100
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### 試したこと
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187
101
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188
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-
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102
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+
ネットでdelegateの実装方法を調ベて試した
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189
103
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190
104
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### 補足情報
|
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191
105
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