Might be a simple question.... in the QML extras there is the FileFolder object, which has methods to write to file or text files. But they seem to just overwrite any existing file - is there a way to append instead?
myfileFolder.writeTextFile("myFile.txt", "my message to add")
myfileFolder.writeFile("myFile.txt", "my message to add")
I am not familiar with QML, but saw you hadn't received a response, yet. I perused the API reference - ArcGIS Runtime QML Extras: FileFolder Class Reference - but couldn't see anything that natively supported appending to the file. This is a really basic feature - I'm surprised it's not something made available to you.