NSKeyArchiver

I only knew there was a problem because I couldn't read the second file back.

So what is the situation ?

- do you write both files and get succes and success2 true ?

- Can you now read both files or not ?

Note: it normal you got it true even when you overwrote the first file.

Why don't you have a symmetric hanling for reading both ? The second is inside the if let of the first.

I would better write like this (and instrument the code to check what's going on.

Thanks to report result:

        let theURL = getDocumentsDirectory().appendingPathComponent("tarfile")
        if let data = NSMutableData(contentsOf: theURL) {
            print("data read on", theURL)
            let unarchiver = NSKeyedUnarchiver(forReadingWith: data as Data)
            if let readArray = unarchiver.decodeObject(forKey: "starray") as? [Float]  {
                unarchiver.finishDecoding()
                tarray = readArray
                print("tarray read ", tarray)
            }
        }               // MOVE CLOSING CURLY BRACE
       
        let theURL2 = getDocumentsDirectory().appendingPathComponent("tipfile")
        if let data2 = NSMutableData(contentsOf: theURL2) {
            print("data2 read on", theURL2)
            let unarchiver2 = NSKeyedUnarchiver(forReadingWith: data2 as Data)
            if let readArray2 = unarchiver2.decodeObject(forKey: "stipray") as? [Float]  {
               unarchiver2.finishDecoding()
                tipray = readArray2
                print("tipray read ", tipray)
            }
        }