 
 //MARK: - PHPhotoLibraryChangeObserver
 extension PhotoPickerController: PHPhotoLibraryChangeObserver {
-    func photoLibraryDidChange(_ changeInstance: PHChange) {
+    public func photoLibraryDidChange(_ changeInstance: PHChange) {
         DispatchQueue.global().async {
             var updateSectionFetchResults = self.items
             var reloadRequired = false

    
}

class PhotoPickerController: UIViewController {

    @IBOutlet weak var tableView: UITableView!
    /// 完成回调

import UIKit
import Photos

 class PDImageItem {
    var fetchResult:PHFetchResult<PHAsset>
    var title:String?
    
