ios - 如何使用照片框架获取引用网址的文件名？

Question

这就是我获取 NSURL 的方式:

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {

    if let referenceUrl = info[UIImagePickerControllerReferenceURL] as? NSURL {
        //access the file name
    }
}

它正在使用 ALAssetsLibrary:

let assetsLibrary = ALAssetsLibrary()
assetsLibrary.assetForURL(referenceUrl, resultBlock: { asset in

    let filename = asset.defaultRepresentation().filename()

}, failureBlock: nil)

但自 iOS 9 起它已被弃用。

Answer 1

最简单的答案:

if let asset = PHAsset.fetchAssetsWithALAssetURLs([referenceUrl], options: nil).firstObject as? PHAsset {

    PHImageManager.defaultManager().requestImageDataForAsset(asset, options: nil, resultHandler: { _, _, _, info in

        if let fileName = (info?["PHImageFileURLKey"] as? NSURL)?.lastPathComponent { 
            //do sth with file name
        }
    })
}