Swift - problems capturing PDF417

I am trying to create a PDF417 reader. I have used the following tutorial and my code is working. http://www.appcoda.com/barcode-reader-swift/

I entered

for metadataObj in metadataObjects {
     print(metadataObj as! AVMetadataMachineReadableCodeObject)
}

      

        
        
        
      

    

The only output I get is

<AVMetadataMachineReadableCodeObject: 0x174039e00, type="org.iso.PDF417", bounds={ 0.3,0.5 0.6x0.2 }>corners { 0.3,0.5 0.3,0.6 0.9,0.6 0.9,0.5 }, time 408341268630291, stringValue "@ ANSI 990876030001DL"

      

        
        
        
      

    

how do I get it to give me the rest of the pdf417 data from the pdf417 barcode?