SwiftUIでPHPickerViewControllerを使って画像を選択する
SwiftUIでPHPickerViewControllerを使って画像を選択する方法です。 ImagePickerというクラスを使って実現しました。
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| import SwiftUI | |
| struct ContentView: View { | |
| @State var image: UIImage? | |
| @State var showingAlert: Bool = false | |
| var body: some View { | |
| VStack { | |
| if let image = image { | |
| Image(uiImage: image) | |
| .resizable() | |
| .frame(width: 200, height: 200) | |
| } else { | |
| Text("No Image") | |
| .font(Font.system(size: 24).bold()) | |
| .foregroundColor(Color.white) | |
| .frame(width: 200, height: 200) | |
| .background(Color(UIColor.lightGray)) | |
| } | |
| Button { | |
| showingAlert = true | |
| } label: { | |
| Text("Select Image") | |
| .font(Font.system(size:20).bold()) | |
| .foregroundColor(Color.white) | |
| .padding(.horizontal, 100) | |
| .padding(.vertical, 16) | |
| .background(Color(UIColor.lightGray)) | |
| } | |
| .padding(.top, 60) | |
| } | |
| .sheet(isPresented: $showingAlert) { | |
| } content: { | |
| ImagePicker(image: $image) | |
| } | |
| } | |
| } |
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| import SwiftUI | |
| import PhotosUI | |
| struct ImagePicker: UIViewControllerRepresentable { | |
| @Environment(\.presentationMode) var presentationMode | |
| @Binding var image: UIImage? | |
| func makeCoordinator() -> Coordinator { | |
| Coordinator(self) | |
| } | |
| func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> PHPickerViewController { | |
| var configuration = PHPickerConfiguration() | |
| configuration.filter = .images | |
| configuration.selectionLimit = 1 | |
| let picker = PHPickerViewController(configuration: configuration) | |
| picker.delegate = context.coordinator | |
| return picker | |
| } | |
| func updateUIViewController(_ uiViewController: PHPickerViewController, context: UIViewControllerRepresentableContext<ImagePicker>) {} | |
| class Coordinator: NSObject, UINavigationControllerDelegate, PHPickerViewControllerDelegate { | |
| let parent: ImagePicker | |
| init(_ parent: ImagePicker) { | |
| self.parent = parent | |
| } | |
| func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) { | |
| parent.presentationMode.wrappedValue.dismiss() | |
| if let itemProvider = results.first?.itemProvider, itemProvider.canLoadObject(ofClass: UIImage.self) { | |
| itemProvider.loadObject(ofClass: UIImage.self) { [weak self] image, _ in | |
| guard let image = image as? UIImage else { | |
| return | |
| } | |
| DispatchQueue.main.sync { | |
| self?.parent.image = image | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } |