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swiftxmlxml-parsingcollada

Why can't I load a Collada file using Swift 4?

I am building a game engine and would like to implement my own parser for Collada files which is in XML format. I am trying to create a XMLParser to do this for me but for some reason when loading a .dae extension, nothing works.

Loading File Example:

//file = XMLParserDelegate
    if let url = Bundle.main.url(forResource: colladaFileName, withExtension: "dae") {
        if let parser = XMLParser.init(contentsOf: url) {
            parser.delegate = self
            parser.parse()
        }
    }

The funny thing is, all of this code gets executed. It isn't until it calls the function "parseErrorOccurred" that I can see the error message which states "Document is empty"

func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error){
    print(parseError) //result: Document is empty
}

HERE IS WHAT REALLY CONFUSES ME!

When I change the extension of my file to be .xml and change the function to be "withExtension: "xml" the code compliles just fine, there are no errors and I can see all of the files data.

My goal is to not have to change my .dae file formats to .xml everysingle time. What can I do to fix this issue?

Solution

  • I managed to read the contents of a .dae file by changing its type to Data in Xcode as shown in this screenshot:

    enter image description here

    I don't know if this is a workaround that fits with your needs but I hope it helps