Swift 3: cant get image from Parse? -

ok, have looked @ questions how access object's fields parse query result in swift? answer not working in swift 3. following trying image first pfobject in parse error:

cannot convert value type nsdata, nserror -> void expected pfdataresultblock ?

var query = pfquery(classname: parse_class!)             query.order(bydescending: "createdat")             query.findobjectsinbackground {                 (objects, error) -> void in              if error == nil {                 //print(objects?.first?["testtxt"] as! nsstring)                 //print(objects?.first?["testimg"] as! pffile)                  let thumbnail = objects?.first?["testimg"] as! pffile                 thumbnail.getdatainbackgroundwithblock{(imagedata: nsdata?, error: nserror?) -> void in                     if error == nil {                         if let image = uiimage(data: imagedata!) { //get image here                          }                     }             }         } 

i have tried changing type , everything. how can store image parse in recent swift?

you can try this:

if let validobjects = objects {    object in validobjects {       let thumbnail = object["testimg"] as? pffile       thumbnail?.getdatainbackground (block: { (data, error) -> void in          //read image here       }    } }