从PHAsset issue获取图像以检测图像的更新

import Photos

// 获取PHAsset对象
let fetchResult = PHAsset.fetchAssets(with: .image, options: nil)
guard let asset = fetchResult.firstObject else {
    print("未找到图像资源")
    return
}

// 请求获取图像
let imageManager = PHImageManager.default()
let requestOptions = PHImageRequestOptions()
requestOptions.isSynchronous = false
requestOptions.deliveryMode = .highQualityFormat

imageManager.requestImage(for: asset, targetSize: CGSize(width: 100, height: 100), contentMode: .aspectFit, options: requestOptions) { (image, info) in
    if let image = image {
        // 处理获取到的图像
        print("获取到图像：\(image)")
    }
}

// 注册图像变化的观察者
let changeOptions = PHFetchOptions()
changeOptions.includeAssetSourceTypes = [.typeUserLibrary]
let changeRequest = PHAsset.fetchAssets(with: changeOptions)
PHPhotoLibrary.shared().register(changeRequest, options: nil) { (change, _) in
    if let change = change {
        // 处理图像变化的通知
        if change.hasIncrementalChanges {
            if let insertedAssets = change.insertedObjects as? [PHAsset] {
                // 处理新增的图像资源
                print("新增图像资源：\(insertedAssets)")
            }
            if let changedAssets = change.changedObjects as? [PHAsset] {
                // 处理变化的图像资源
                print("变化的图像资源：\(changedAssets)")
            }
            if let removedAssets = change.removedObjects as? [PHAsset] {
                // 处理移除的图像资源
                print("移除的图像资源：\(removedAssets)")
            }
        }
    }
}