Gallery Swift错误没有成员如何使用'init（forAssetCollection：assets :)'已被'init（for：assets :)'取代

Question

我正在为我的学校开发一个应用程序，但不幸的是我无法跟上，因为我有几个错误。请有人帮帮我吗？

以下是代码中错误的图片。 enter image description here

以下是我的错误：

1. 类型'ViewController'的值没有成员'assetCollectionPlaceholder'
2. 类型'ViewController'的值没有成员'assetCollectionPlaceholder'
3. “ViewController”类型的值没有成员“image”
4. 'init（forAssetCollection：assets :)'已替换为'init（for：assets :)'
5. 'ViewController'类型的值没有成员'showImages'

以下是顶部的代码：

import UIKit
import Photos
var image: UIImage!
var assetCollection: PHAssetCollection!
var albumFound : Bool = false
var photosAsset: PHFetchResult<AnyObject>!
var assetThumbnailSize:CGSize!
var collection: PHAssetCollection!
var assetCollectionPlaceholder: PHObjectPlaceholder!

以下是代码：

    func createAlbum() {
        //Get PHFetch Options
        stronglet fetchOptions = PHFetchOptions()
        fetchOptions.predicate = NSPredicate(format: "title = %@", "camcam")
        let collection : PHFetchResult = PHAssetCollection.fetchAssetCollections(with: .album, subtype: .any, options: fetchOptions)
        //Check return value - If found, then get the first album out
        if let _: AnyObject = collection.firstObject {
            self.albumFound = true
            assetCollection = collection.firstObject as! PHAssetCollection
        } else {
            //If not found - Then create a new album
            PHPhotoLibrary.shared().performChanges({
                let createAlbumRequest : PHAssetCollectionChangeRequest = PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: "camcam")
               self.assetCollectionPlaceholder = createAlbumRequest.placeholderForCreatedAssetCollection   
            }, completionHandler: { success, error in
                self.albumFound = success

                if (success) {
                    let collectionFetchResult = PHAssetCollection.fetchAssetCollectionsWithLocalIdentifiers([self.assetCollectionPlaceholder.localIdentifier], options: nil)
                    print(collectionFetchResult)
                    self.assetCollection = collectionFetchResult.firstObject as! PHAssetCollection
                }
            })
        }
    }

    func saveImage(){
        PHPhotoLibrary.shared().performChanges({
            let assetRequest = PHAssetChangeRequest.creationRequestForAssetFromImage(atFileURL: self.image)
            let assetPlaceholder = assetRequest.placeholderForCreatedAsset
            let albumChangeRequest = PHAssetCollectionChangeRequest(forAssetCollection: self.assetCollection, assets: self.photosAsset as! PHFetchResult<PHAsset>)
            albumChangeRequest!.addAssets([assetPlaceholder!])
        }, completionHandler: { success, error in
            print("added image to album")
            print(error as Any)

            self.showImages()
        })
    }