ALAssetsLibraryのALAssetからNSDataを作る ref: http://qiita.com/ottati/items/20e93fb18d90d2d585fe

file0.swift

ALAssetsLibrary().assetForURL(url,
    resultBlock: { (asset: ALAsset!) in
        // Convert from ALAsset to NSData
        var rep = asset.defaultRepresentation()
        var bufferSize = UInt(Int(rep.size()))
        var buffer = UnsafeMutablePointer<UInt8>(malloc(bufferSize))
        var buffered = rep.getBytes(buffer, fromOffset: 0, length: Int(rep.size()), error: nil)
        var data = NSData(bytesNoCopy: buffer, length: buffered, freeWhenDone: true)
    },
    failureBlock: { (error: NSError!) in
    }
)

Will swift3 how to deal with it?