wehub-resource-sync
73 lines
2.7 KiB
Swift
73 lines
2.7 KiB
Swift
//
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// DocumentPicker.swift
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// MNNLLMiOS
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//
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// Created by 游薪渝(揽清) on 2025/10/13.
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//
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import UIKit
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import SwiftUI
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import UniformTypeIdentifiers
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/// SwiftUI wrapper for UIActivityViewController
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/// Presents the system share sheet for sharing content
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/// Document picker for selecting files from the system
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/// Provides a SwiftUI wrapper around UIDocumentPickerViewController
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struct DocumentPicker: UIViewControllerRepresentable {
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let onDocumentPicked: (Result<[URL], Error>) -> Void
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/// Creates the document picker view controller
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/// - Parameter context: The representable context
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/// - Returns: Configured UIDocumentPickerViewController
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func makeUIViewController(context: Context) -> UIDocumentPickerViewController {
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// Support for .txt, .json, and .jsonl files
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let supportedTypes: [UTType] = [
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.text,
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.json,
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UTType(filenameExtension: "jsonl") ?? .plainText
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]
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let picker = UIDocumentPickerViewController(forOpeningContentTypes: supportedTypes, asCopy: true)
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picker.delegate = context.coordinator
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picker.allowsMultipleSelection = false
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return picker
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}
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/// Updates the document picker view controller
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/// - Parameters:
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/// - uiViewController: The document picker view controller
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/// - context: The representable context
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func updateUIViewController(_: UIDocumentPickerViewController, context _: Context) {
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// No updates needed
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}
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/// Creates the coordinator for handling delegate callbacks
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/// - Returns: DocumentPickerCoordinator instance
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func makeCoordinator() -> DocumentPickerCoordinator {
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DocumentPickerCoordinator(onDocumentPicked: onDocumentPicked)
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}
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}
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/// Coordinator for handling document picker delegate methods
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/// Manages the communication between UIDocumentPickerViewController and SwiftUI
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class DocumentPickerCoordinator: NSObject, UIDocumentPickerDelegate {
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let onDocumentPicked: (Result<[URL], Error>) -> Void
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/// Initializes the coordinator with a completion handler
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/// - Parameter onDocumentPicked: Callback for when documents are selected
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init(onDocumentPicked: @escaping (Result<[URL], Error>) -> Void) {
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self.onDocumentPicked = onDocumentPicked
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}
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/// Called when documents are successfully picked
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/// - Parameter controller: The document picker controller
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func documentPicker(_: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
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onDocumentPicked(.success(urls))
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}
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/// Called when document picking is cancelled
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/// - Parameter controller: The document picker controller
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func documentPickerWasCancelled(_: UIDocumentPickerViewController) {
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// User cancelled, no action needed
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}
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}
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