質問編集履歴
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誤字
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【swift】
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【swift】DKAssetについて
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書式の改善
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##
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##質問
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DKImagePickerControllerライブラリを導入してアプリを作成しているのですが、```DKAsset
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```の```fetchImage```と```fetchFullScreenImage```の違いが理解し切れていません。
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DKImagePickerControllerライブラリを導入する前はテキスト+複数画像添付で投稿しタイムライン表示できていたのですが、ライブラリ導入後複数画像添付はできるものの投稿ボタンを押下してもタイムラインに表示されなくなってしまいました。
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※必要な処理だけ抜粋します
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ライブラリ導入前
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```swift
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func onPostPicture(comment: String, pictures: [UIImage]) {
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preconditionFailure("This method must be overridden")
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}
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//アルバムから画像選択できるようにする
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func commentFormViewDidTapAlbum() {
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let imagePicker = UIImagePickerController()
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imagePicker.sourceType = .photoLibrary
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imagePicker.delegate = self
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self.present(imagePicker, animated: true, completion: nil)
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}
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//選択ボタン押下後添付する
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func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
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if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
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// 画像選択
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dismiss(animated: true) {
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self.showShareImageForm(image: image)
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}
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}
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}
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//投稿ボタンを押下後タイムラインに投稿したものを表示する
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func commentShareViewControllerDidTapPost(comment: String, parentTalkId: TalkId?, attachment: TalkAttachment?) {
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guard let attachment = attachment else {
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self.onPostComment(comment: comment, parentTalkId: parentTalkId)
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return
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}
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２パターンコードを書いてビルドしてみましたが、違いがわからなかったので、ご教示いただきたいです。
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self.onPostPicture(comment: comment, pictures: pictures, parentTalkId: parentTalkId)
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}
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//省略
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}
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```
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ライブラリ導入後
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```swift
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func onPostPicture(comment: String, pictures: [UIImage]) {
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preconditionFailure("This method must be overridden")
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}
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//アルバムから画像選択できるようにする
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func commentFormViewDidTapAlbum() {
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let imagePicker = DKImagePickerController()
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imagePicker.allowMultipleTypes = false
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imagePicker.maxSelectableCount = 4
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imagePicker.assetType = .allPhotos
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imagePicker.sourceType = .photo
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imagePicker.didSelectAssets = { [unowned self] (assets: [DKAsset]) in
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showShareImageForm(assets: assets)
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}
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self.present(imagePicker, animated: true, completion: nil)
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}
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//選択ボタン押下後添付する
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func showShareImageForm(assets: [DKAsset]) {
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let vc = UIStoryboard(name: "CommentForm", bundle: nil).instantiateInitialViewController() as! CommentShareViewController
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let dispatchGroup = DispatchGroup()
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let dispatchQueue = DispatchQueue(label: "updateImagesQueue", attributes: .concurrent)
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for asset in assets {
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dispatchGroup.enter()
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dispatchQueue.async(group: dispatchGroup) {
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asset.fetchFullScreenImage(completeBlock: { image, _ in
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if let picture = image {
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if vc.attachment == nil {
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vc.attachPicture(pictures: [picture])
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} else if case .picture(var pictures) = vc.attachment {
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pictures.append(picture)
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vc.attachPicture(pictures: pictures)
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}
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}
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dispatchGroup.leave()
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})
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}
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}
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// 全ての非同期処理完了後にメインスレッドで処理
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dispatchGroup.notify(queue: .main) {
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self.present(UINavigationController(rootViewController: vc), animated: true, completion: nil)
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}
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}
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//投稿ボタンを押下後タイムラインに投稿したものを表示する
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func commentShareViewControllerDidTapPost(comment: String, parentTalkId: TalkId?, attachment: TalkAttachment?) {
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guard let attachment = attachment else {
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self.onPostComment(comment: comment, parentTalkId: parentTalkId)
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return
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}
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if case .picture(let pictures) = attachment {
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self.onPostPicture(comment: comment, pictures: pictures, parentTalkId: parentTalkId)
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}
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//省略
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}
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```
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##試してみたこと
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`onPostPicture()`の引数`pictures: [UIImage]`を`pictures: [DKAsset]`に変更しましたが、
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`commentShareViewControllerDidTapPost()`内で使用している`onPostPicture()`の引数`pictures: pictures`で、
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Cannot convert value of type '[UIImage]' to expected argument type '[DKAsset]'
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とエラーが表示されます。
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ライブラリ導入前は複数枚の画像を添付し、投稿できていたのに画像複数選択→複数画像添付で投稿できなくなってしまったのは何故でしょうか？
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