Cannot convert value of type 'inout NSNumber?' to expected argument type 'AutoreleasingUnsafeMutablePointer<AnyObject?>' error

Question

I have this script use to check whether the *downloaded file from iCloud is available or not. But unfortunately I encountered error Cannot convert value of type 'inout NSNumber?' to expected argument type 'AutoreleasingUnsafeMutablePointer<AnyObject?>' in some lines of code. Please help me to solve this issue because it is my first time to create a code to check whether the downloaded file is available in the icloud or not.

Please refer to the image below as sample of the error and also codes are available below for your reference. Hope you could help me. Thank you.

Sample screenshot of error

 //-------------------------------------------------------------------
// ダウンロードできるか判定 Judgment or can be downloaded
//-------------------------------------------------------------------

func downloadFileIfNotAvailable(_ file: URL?) -> Bool {
    var isIniCloud: NSNumber? = nil
    do {
        try (file as NSURL?)?.getResourceValue(&isIniCloud, forKey: .isUbiquitousItemKey)

        if try (file as NSURL?)?.getResourceValue(&isIniCloud, forKey: .isUbiquitousItemKey) != nil {
            if isIniCloud?.boolValue ?? false {
                var isDownloaded: NSNumber? = nil
                if try (file as NSURL?)?.getResourceValue(&isDownloaded, forKey: .ubiquitousItemIsDownloadedKey) != nil {
                    if isDownloaded?.boolValue ?? false {
                        return true
                    }
                    performSelector(inBackground: #selector(startDownLoad(_:)), with: file)
                    return false
                }
            }
        }
    } catch {
    }
    return true
}

Answer 1

It looks like you copied and pasted some really old code. Besides, this is Swift, not Objective-C. Do not use NSURL or getResourceValue. Your code should look more like this:

    if let rv = try file?.resourceValues(forKeys: [.isUbiquitousItemKey]) {
        if let isInCloud = rv.isUbiquitousItem {
            // and so on
        }
    }

And so on; the same pattern applied to other keys. Note that there is no .ubiquitousItemIsDownloadKey either. You can condense things like this:

    if let rv = try file?.resourceValues(
        forKeys: [.isUbiquitousItemKey, .ubiquitousItemDownloadingStatusKey]) {
            if let isInCloud = rv.isUbiquitousItem {
                if let status = rv.ubiquitousItemDownloadingStatus {
                    if status == .downloaded {

                    }
                }
            }
    }