編集履歴

質問編集履歴

内容の変更

2021/09/07 08:36

投稿

スコア0

test CHANGED Viewed

	@@ -1 +1 @@
1	- 【Swift】~~遷移先のVi~~e~~wで選択されたima~~g~~eを遷移元のViewのUIIm~~ae~~geViewに反映さ~~せ~~る方法~~
1	+ 【Swift】Delegateがうまく機能しません

test CHANGED Viewed

@@ -2,9 +2,13 @@
 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。
-アプリ自体はStudyPlusのようなアプリをイメージしています。![![イメージ説明](c9272ca26aaeee4b3138a82b16572ffc.jpeg)![イメージ説明](a2db9018e57b6240dfdb06533137816e.jpeg)![イメージ説明](5e2822a361fa1ac26683f494ada410bd.jpeg)![イメージ説明](6a1e2a485653ce292a3cd16d4a614d5f.jpeg)
+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。
+アプリ自体はStudyPlusのようなアプリをイメージしています。![![イメージ説明](c9272ca26aaeee4b3138a82b16572ffc.jpeg)![イメージ説明](5e2822a361fa1ac26683f494ada410bd.jpeg)![イメージ説明](6a1e2a485653ce292a3cd16d4a614d5f.jpeg)
+### 遷移元のソースコード
 ```Swift
@@ -12,13 +16,125 @@
+protocol didChoiseMaterialDelegate {
+    func changeImage()
+}
-class addMaterialViewController:UIViewController{
+class choiseIconsViewController: UIViewController{
+    var delegate: didChoiseMaterialDelegate?
+　　〜省略〜
+    let appDlegate:AppDelegate = UIApplication.shared.delegate as! AppDelegate
+}
+extension choiseIconsViewController: UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout {
+    //cellが押された時の処理
+    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
+        self.delegate?.changeImage()
+        self.dismiss(animated: false, completion: nil)
+    }
+    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+        return icons.count
+    }
+    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
+        let cell:UICollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath)
+        let imageView = cell.contentView.viewWithTag(1) as! UIImageView
+        let cellImage = UIImage(named: icons[indexPath.row])//各セルにiconsの画像を反映
+        let resizedImage = cellImage?.resized(withPercentage: 0.05)//画像のデータサイズを縮小
+        imageView.image = resizedImage
+        appDlegate.iconImage = imageView.image
+        return cell
+    }
+    〜省略〜
+}
+```
+### 遷移先のソースコード
+```Swift
+import UIKit
+class addMaterialViewController:UIViewController,didChoiseMaterialDelegate{
+    let appDelegate:AppDelegate = UIApplication.shared.delegate as! AppDelegate
     @IBOutlet weak var addImageStackView: UIStackView!
-    @IBOutlet weak var addMaterialImageView: UIImageView!//ここに選択された画像を表示したい
+    @IBOutlet weak var addMaterialImageView: UIImageView!
     @IBOutlet weak var materialName: UITextField!
@@ -54,325 +170,37 @@
-        self.choiseIconsView.delegate = self
+        addMaterialImageView.image = appDelegate.iconImage
-    }
+    }
-    //stackViewがタップされた時の処理
-    @objc private func tappedStackView() {
+    func changeImage() {
-        let choiseIamgeTypeAlert = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
-        let iconChoice = UIAlertAction(title: "アイコンから選択", style: .default, handler:  {(action:UIAlertAction!) -> Void in
-            print("アイコンから選択します")
-            let storyboard = UIStoryboard(name: "choiseIcons", bundle: nil)
-            let choiseIconsViewController = storyboard.instantiateViewController(withIdentifier: "choiseIconsViewController") as! choiseIconsViewController
-            let nav = UINavigationController(rootViewController: choiseIconsViewController)
-            nav.modalTransitionStyle = .coverVertical
-            選択画面に遷移
-            self.present(nav, animated: false, completion: nil)
-　　　　　　　//画面遷移を横からに変更
-            let transition = CATransition()
-                transition.duration = 0.25
-                transition.type = CATransitionType.push
-                transition.subtype = CATransitionSubtype.fromRight
-            self.view.window!.layer.add(transition, forKey: kCATransition)
-        })
-        let TakeChoise = UIAlertAction(title: "写真を撮る", style: .default, handler: {(action:UIAlertAction!) -> Void in
-            print("写真を撮ります")
+        print("success")
-        })
-        let LibraryChoise = UIAlertAction(title: "ライブラリから選択", style: .default, handler: {(action:UIAlertAction) -> Void in
-            print("ライブラリから選択します")
-        })
-        let cancel = UIAlertAction(title: "キャンセル", style: .cancel, handler: {(action:UIAlertAction!) -> Void in
-            print("キャンセルします")
-            choiseIamgeTypeAlert.dismiss(animated: false, completion: nil)
-        })
-        choiseIamgeTypeAlert.addAction(iconChoice)
+        addMaterialImageView.image = appDelegate.iconImage
-        choiseIamgeTypeAlert.addAction(TakeChoise)
-        choiseIamgeTypeAlert.addAction(LibraryChoise)
-        choiseIamgeTypeAlert.addAction(cancel)
-        self.present(choiseIamgeTypeAlert, animated: true, completion: nil)
-    }
+    }
+   〜省略〜
 }
 ```
-### 遷移先のソースコード
-```Swift
-import UIKit
-class choiseIconsViewController: UIViewController {
-    private let cellId = "cellId"
-    //画像の名前
-    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"]
-    @IBOutlet weak var iconsCollection: UICollectionView!
-    override func viewDidLoad() {
-        super.viewDidLoad()
-        iconsCollection.delegate = self
-        iconsCollection.dataSource = self
-        title = "アイコンから選択"
-        let backButtonItem = UIBarButtonItem(title: "戻る", style: .plain, target: self, action: #selector(tappedBack))
-        self.navigationItem.leftBarButtonItem = backButtonItem
-    }
-    //戻るボタンを押した時の処理
-    @objc func tappedBack() {
-        self.dismiss(animated: false, completion: nil)
-        let transition = CATransition()
-            transition.duration = 0.25
-            transition.type = CATransitionType.push
-            transition.subtype = CATransitionSubtype.fromLeft
-        self.view.window!.layer.add(transition, forKey: kCATransition)
-    }
-}
-extension choiseIconsViewController: UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout {
-    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
-        self.dismiss(animated: false, completion: nil)
-        let transition = CATransition()
-            transition.duration = 0.25
-            transition.type = CATransitionType.push
-            transition.subtype = CATransitionSubtype.fromLeft
-        self.view.window!.layer.add(transition, forKey: kCATransition)
-    }
-    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
-        return icons.count
-    }
-    //各CollectionViewのcellが押された時の処理
-    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
-        let cell:UICollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath)
-        let imageView = cell.contentView.viewWithTag(1) as! UIImageView
-        let cellImage = UIImage(named: icons[indexPath.row])//各セルにiconsの画像を反映
-        let resizedImage = cellImage?.resized(withPercentage: 0.05)//画像のデータサイズを縮小
-        imageView.image = resizedImage
-        return cell
-    }
-    //セルのサイズの指定
-    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
-        return CGSize(width: 20, height: 40)
-    }
-    //行の間隔
-    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
-        return 30
-    }
-    //列の間隔
-    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
-        return 30
-    }
-    func numberOfSections(in collectionView: UICollectionView) -> Int {
-        return 1
-    }
-}
-extension UIImage {
-    func resized(withPercentage percentage: CGFloat) -> UIImage? {
-            let canvas = CGSize(width: size.width * percentage, height: size.height * percentage)
-            return UIGraphicsImageRenderer(size: canvas, format: imageRendererFormat).image {
-                _ in draw(in: CGRect(origin: .zero, size: canvas))
-            }
-        }
-}
-```
 ### 試したこと
-AppDelegateでUIImage型の変数を作ってView間で変数を共有する
+ネットでdelegateの実装方法を調ベて試した