如何在SwiftUI中打开ImagePicker？

• Z时代
• 2024-01-10
• 分类：问答

我需要使用SwiftUI在我的应用程序中打开ImagePicker，我该怎么做？

我考虑过使用UIImagePickerController，但是我不知道如何在SwiftUI中做到这一点。

回答：

Xcode 11.4的清理版本可以通过SPM作为Swift软件包获得：

https://github.com/ralfebert/ImagePickerView

资源：

import SwiftUI
public struct ImagePickerView: UIViewControllerRepresentable {
    private let sourceType: UIImagePickerController.SourceType
    private let onImagePicked: (UIImage) -> Void
    @Environment(\.presentationMode) private var presentationMode
    public init(sourceType: UIImagePickerController.SourceType, onImagePicked: @escaping (UIImage) -> Void) {
        self.sourceType = sourceType
        self.onImagePicked = onImagePicked
    }
    public func makeUIViewController(context: Context) -> UIImagePickerController {
        let picker = UIImagePickerController()
        picker.sourceType = self.sourceType
        picker.delegate = context.coordinator
        return picker
    }
    public func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) {}
    public func makeCoordinator() -> Coordinator {
        Coordinator(
            onDismiss: { self.presentationMode.wrappedValue.dismiss() },
            onImagePicked: self.onImagePicked
        )
    }
    final public class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
        private let onDismiss: () -> Void
        private let onImagePicked: (UIImage) -> Void
        init(onDismiss: @escaping () -> Void, onImagePicked: @escaping (UIImage) -> Void) {
            self.onDismiss = onDismiss
            self.onImagePicked = onImagePicked
        }
        public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
            if let image = info[.originalImage] as? UIImage {
                self.onImagePicked(image)
            }
            self.onDismiss()
        }
        public func imagePickerControllerDidCancel(_: UIImagePickerController) {
            self.onDismiss()
        }
    }
}

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