i have been trying create valid json objects , can't seem so. i've been looking @ create json object class in swift reference , person seemed code work. have similar. here attempt:
func parseexportdb() -> [dictionary<nsstring, anyobject>]{ var exportdict: [dictionary<nsstring, anyobject>] = [] tuple in export { var dictobj = [ "phoneid": 123, "loclabel": tuple[crosslocation] nsstring, "latitude": 123, "longitude": -123, "time" : tuple[time] nsstring, "heading" : tuple[heading] nsstring ] exportdict.append(dictobj) } return exportdict } this how call function:
var exportlist = database.parseexportdb() exportdata.sendjsontoserver(exportlist) and how try send json has post request server:
func sendjsontoserver(exportlist: [dictionary<nsstring, anyobject>]){ if nsjsonserialization.isvalidjsonobject(exportlist){ println("is not valid json.") } var request = nsmutableurlrequest(url: nsurl(string: "<server link here>")!) var session = nsurlsession.sharedsession() request.httpmethod = "post" var err: nserror? if let serializeddata = nsjsonserialization.datawithjsonobject(exportlist, options: nil, error: &err){ println("export list: \(exportlist)") if nsjsonserialization.isvalidjsonobject(exportlist){ println("is not valid json again!") } else{ println("valid json!") } request.httpbody = serializeddata println(request.httpbody) } request.addvalue("application/json", forhttpheaderfield: "content-type") request.addvalue("application/json", forhttpheaderfield: "accept") ... } the issue when call first , second if nsjsonserialization.isvalidjsonobject(exportlist) statement, both seem exportlist not valid json. have no idea why. have looked @ link above , have looked @ lots of links , have said valid json should in format of nsarray or nsdictionary`. furthermore, have looked @ data , seems looks should. appreciated. thanks!
edit: mistake on code above.. anyways if me next portion great.. trying make http post request , after perform code above, portion want send data server. here attempt:
var task = session.datataskwithrequest(request, completionhandler: {data, response, error -> void in println("request: \(request)") var strdata = nsstring(data: data, encoding: nsutf8stringencoding) println("body: \(strdata)") var err: nserror? var json = nsjsonserialization.jsonobjectwithdata(data, options: .mutableleaves, error: &err) as! nsarray // did jsonobjectwithdata constructor return error? if so, log error console if(err != nil) { println(err!.localizeddescription) let jsonstr = nsstring(data: data, encoding: nsutf8stringencoding) println("error not parse json: '\(jsonstr)'") } however, when try perform line var json = nsjsonserialization.jsonobjectwithdata(data, options: .mutableleaves, error: &err) as! nsarray, data term returns nil , i'm not entirely sure why... insight?
your code correct little detail:
you do
if nsjsonserialization.isvalidjsonobject(exportlist){ println("is not valid json.") } if valid show error???
that's wrong way round.. miss not
if !nsjsonserialization.isvalidjsonobject(exportlist){ println("is not valid json.") } 