如何从自定义相册中获取所有图像-Swift

• Z时代
• 2024-01-10
• 分类：问答

如何从 自定义 相册中获取 所有图像 ？ __

var fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [NSSortDescriptor(key:"creationDate", ascending: false)]
fetchOptions.predicate = NSPredicate(format: "mediaType = %d", PHAssetMediaType.Image.rawValue)
let allImages:PHFetchResult = PHAsset.fetchKeyAssetsInAssetCollection(albumList[index].collection, options: fetchOptions)

该代码块仅获取其中一些。谢谢。

-> albumList[index].collection的类型是PHAssetCollection

回答：

对于Swift 4

使用这个答案为自己编辑了一点。

import Photos
func fetchCustomAlbumPhotos()
{
    let albumName = "Album Name Here"
    var assetCollection = PHAssetCollection()
    var albumFound = Bool()
    var photoAssets = PHFetchResult<AnyObject>()
    let fetchOptions = PHFetchOptions()
    fetchOptions.predicate = NSPredicate(format: "title = %@", albumName)
    let collection:PHFetchResult = PHAssetCollection.fetchAssetCollections(with: .album, subtype: .any, options: fetchOptions)
    if let firstObject = collection.firstObject{
        //found the album
        assetCollection = firstObject
        albumFound = true
    }
    else { albumFound = false }
    _ = collection.count
    photoAssets = PHAsset.fetchAssets(in: assetCollection, options: nil) as! PHFetchResult<AnyObject>
    let imageManager = PHCachingImageManager()
    photoAssets.enumerateObjects{(object: AnyObject!,
        count: Int,
        stop: UnsafeMutablePointer<ObjCBool>) in
        if object is PHAsset{
            let asset = object as! PHAsset
            print("Inside  If object is PHAsset, This is number 1")
            let imageSize = CGSize(width: asset.pixelWidth,
                                   height: asset.pixelHeight)
            /* For faster performance, and maybe degraded image */
            let options = PHImageRequestOptions()
            options.deliveryMode = .fastFormat
            options.isSynchronous = true
            imageManager.requestImage(for: asset,
                                              targetSize: imageSize,
                                              contentMode: .aspectFill,
                                              options: options,
                                              resultHandler: {
                                                (image, info) -> Void in
                                                self.photo = image!
                                                /* The image is now available to us */
                                                self.addImgToArray(uploadImage: self.photo!)
                                                print("enum for image, This is number 2")
            })
        }
    }
}
func addImgToArray(uploadImage:UIImage)
{
    self.images.append(uploadImage)
}

对于Swift 2.1

import Photos
func FetchCustomAlbumPhotos()
{
    var albumName = "SwiftAlbum"
    var assetCollection = PHAssetCollection()
    var albumFound = Bool()
    var photoAssets = PHFetchResult()
    let fetchOptions = PHFetchOptions()
    fetchOptions.predicate = NSPredicate(format: "title = %@", albumName)
    let collection:PHFetchResult = PHAssetCollection.fetchAssetCollectionsWithType(.Album, subtype: .Any, options: fetchOptions)
    if let first_Obj:AnyObject = collection.firstObject{
        //found the album
        assetCollection = collection.firstObject as! PHAssetCollection
        albumFound = true
    }
    else { albumFound = false }
    var i = collection.count
    photoAssets = PHAsset.fetchAssetsInAssetCollection(assetCollection, options: nil)
    let imageManager = PHCachingImageManager()
    //        let imageManager = PHImageManager.defaultManager()
    photoAssets.enumerateObjectsUsingBlock{(object: AnyObject!,
        count: Int,
        stop: UnsafeMutablePointer<ObjCBool>) in
        if object is PHAsset{
            let asset = object as! PHAsset
            print("Inside  If object is PHAsset, This is number 1")
            let imageSize = CGSize(width: asset.pixelWidth,
                height: asset.pixelHeight)
            /* For faster performance, and maybe degraded image */
            let options = PHImageRequestOptions()
            options.deliveryMode = .FastFormat
            options.synchronous = true
            imageManager.requestImageForAsset(asset,
                targetSize: imageSize,
                contentMode: .AspectFill,
                options: options,
                resultHandler: {
                    (image, info) -> Void in
                    self.photo = image!
                    /* The image is now available to us */
                    self.addImgToArray(self.photo)
                    print("enum for image, This is number 2")
            })
        }
    }
}
func addImgToArray(uploadImage:UIImage)
{
    self.images.append(uploadImage)
}

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