experimental support for set new storage path on iOS

ios/Runner/AppDelegate.swift

@@ -1,12 +1,16 @@
 import Flutter
 import UIKit
 import UniformTypeIdentifiers
+import Foundation // 添加此行
 
 @main
 @objc class AppDelegate: FlutterAppDelegate, UIDocumentPickerDelegate {
   var flutterResult: FlutterResult?
   var directoryPath: URL!
 
+  // 定义插件通道名称
+  private var directoryPicker: DirectoryPicker?
+
   override func application(
     _ application: UIApplication,
     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
@@ -42,6 +46,9 @@ import UniformTypeIdentifiers
         self.directoryPath?.stopAccessingSecurityScopedResource()
         self.directoryPath = nil
         result(nil)
+      } else if call.method == "selectDirectory" {
+        self.directoryPicker = DirectoryPicker()
+        self.directoryPicker?.selectDirectory(result: result)
       } else {
         result(FlutterMethodNotImplemented)
       }

ios/Runner/DirectoryPicker.swift

@@ -0,0 +1,36 @@
+import UIKit
+import Flutter
+
+class DirectoryPicker: NSObject, UIDocumentPickerDelegate {
+    private var result: FlutterResult?
+
+    // 初始化选择目录方法
+    func selectDirectory(result: @escaping FlutterResult) {
+        self.result = result
+
+        // 配置 UIDocumentPicker 为目录选择模式
+        let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: [.folder])
+        documentPicker.delegate = self
+        documentPicker.allowsMultipleSelection = false
+
+        // 获取根视图控制器并显示选择器
+        if let rootViewController = UIApplication.shared.keyWindow?.rootViewController {
+            rootViewController.present(documentPicker, animated: true, completion: nil)
+        }
+    }
+
+    // 处理选择完成后的结果
+    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
+        // 获取选中的路径
+        if let url = urls.first {
+            result?(url.path)
+        } else {
+            result?(nil)
+        }
+    }
+
+    // 处理取消选择情况
+    func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
+        result?(nil)
+    }
+}

ios/Runner/Info.plist

@@ -46,6 +46,10 @@
 	<key>UIApplicationSupportsIndirectInputEvents</key>
 	<true/>
 	<key>NSPhotoLibraryUsageDescription</key>
-  <string>Choose images</string>
+  	<string>Choose images</string>
+	<key>UIFileSharingEnabled</key>
+	<true/>
+	<key>LSSupportsOpeningDocumentsInPlace</key>
+	<true/>
 </dict>
 </plist>