Get file size of PHAsset without loading in the resource?

Question

Is there a way to get the file size on disk of a PHAsset without doing requestImageDataForAsset or converting it to ALAsset? I am loading in previews of a user's photo library - potentially many thousands of them - and it's imperative to my app that they know the size before import.

Answer 1

You can grab the fileSize of a PHAsset and convert it to human readable form like this:

let resources = PHAssetResource.assetResources(for: yourAsset) // your PHAsset
          
var sizeOnDisk: Int64? = 0
        
if let resource = resources.first {
    let unsignedInt64 = resource.value(forKey: "fileSize") as? CLong
    sizeOnDisk = Int64(bitPattern: UInt64(unsignedInt64!))
}

Then use your sizeOnDisk variable and pass it into a method like this...

func converByteToHumanReadable(_ bytes:Int64) -> String {
     let formatter:ByteCountFormatter = ByteCountFormatter()
     formatter.countStyle = .binary
     
     return formatter.string(fromByteCount: Int64(bytes))
 }