按顺序获取 PHAssets

Fetch PHAssets in sequence

我正在尝试通过传递本地标识符数组从照片库中获取资源。但是输出的顺序不一样。我的应用程序要求我在 sequence.This 中获取它们,这就是我使用它的方式

let fetchedResults = PHAsset.fetchAssets(withLocalIdentifiers: videosInLibrary, options: nil)
fetchedResults.enumerateObjects { (asset:PHAsset , count:Int, stop:UnsafeMutablePointer<ObjCBool>) in

我们能做些什么来按照我传递的本地标识符的顺序获取它们吗?

它是数据库,因此按存储的形式返回,但您可以在本地执行:

let fetchedResults = PHAsset.fetchAssets(withLocalIdentifiers: videosInLibrary, options: nil)

var tmpCache = [String: PHAsset]()
fetchedResults.enumerateObjects { (asset:PHAsset , count:Int, stop:UnsafeMutablePointer<ObjCBool>) in
    tmpCache[asset.localIdentifier] = asset
}

let results = videosInLibrary.compactMap { tmpCache[[=10=]] }