ios - How to wait for a nested Alamofire request to complete -

-

i have 2 alamofire requests. both work fine on own.

func getpatientid() {  //puts patientid patientid variable      usingoauth2(drchronooauth2settings, performwithtoken: { token in         router.oauthtoken = token         apicalltext = "last_name=" + self.lastname.text! + "&"  + "first_name=" + self.firstname.text!         alamofire.request(router.getpatientswithfilter())             .responsejson(completionhandler: { (result) -> void in                 if let data = result.data {                     let response = nsstring(data: data, encoding: nsutf8stringencoding)                     self.result.text = "\(response)"                      json = json(data: data)                 }                      self.result.text = ""                     if json!["count"].intvalue > 1 {                         self.result.text = "more 1 patient"                         patientid = "-1"                     } else {                         item in json!["results"].arrayvalue {                             patientid = item["id"].stringvalue                             self.result.text = ("patient id is: " + patientid!)                     }                 }              })          }, errorhandler: {             print("oauth2 failed")      })  view.endediting(true)  }

and...

func postpdf() {      getpatientid()  //need wait completion       usingoauth2(drchronooauth2settings, performwithtoken: { token in         drchronorequestconvertible.oauthtoken = token          alamofire.upload(             .post,             "https://drchrono.com/api/documents",             headers: ["authorization" : "bearer " +  token],             multipartformdata: { multipartformdata in                 //some multiform data including patientid getpatientid()              },             encodingcompletion: { encodingresult in                 switch encodingresult {                 case .success(let upload, _, _):                     upload.responsejson { response in                         debugprint(response)                         self.result.text = "successful upload"                     }                 case .failure(let encodingerror):                     print(encodingerror)                 }             }         )            }, errorhandler: {             print("oauth2 failed")      }) }

the above code won't work because "getpatientid" function isn't complete. know know have use dispatch or completion handler somehow. find topic confusing. have looked through similar solutions here, can't find 1 works me.

you can nest postpdf call inside completion handler of getpatientid this:

func getpatientid() {  //puts patientid patientid variable  usingoauth2(drchronooauth2settings, performwithtoken: { token in     router.oauthtoken = token     apicalltext = "last_name=" + self.lastname.text! + "&"  + "first_name=" + self.firstname.text!     alamofire.request(router.getpatientswithfilter())         .responsejson(completionhandler: { (result) -> void in             if let data = result.data {                 let response = nsstring(data: data, encoding: nsutf8stringencoding)                 self.result.text = "\(response)"                  json = json(data: data)             }                  self.result.text = ""                 if json!["count"].intvalue > 1 {                     self.result.text = "more 1 patient"                     patientid = "-1"                 } else {                     item in json!["results"].arrayvalue {                         patientid = item["id"].stringvalue                         self.result.text = ("patient id is: " + patientid!)                 }             }              // getpatientid has completed, call next function             postpdf()          })      }, errorhandler: {         print("oauth2 failed")  })  view.endediting(true)  }

Comments

Post a Comment

Popular posts from this blog

Django REST Framework perform_create: You cannot call `.save()` after accessing `serializer.data` -

-
i have following viewset: class artistprofileviewset(viewsets.modelviewset): queryset = artistprofile.objects.all() serializer_class = artistprofileserializer def perform_create(self, serializer): if serializer.is_valid(): serializer.save() with following serializers: class simpleartisttrackserializer(serializers.hyperlinkedmodelserializer): class meta: model = artisttrack fields = (...my fields...) class artistprofileserializer(serializers.hyperlinkedmodelserializer): owners = userserializer(many=true, required=false) tracks = simpleartisttrackserializer(many=true, required=false) class meta: model = artistprofile fields = (...my fields...) i getting following error: assertionerror: cannot call `.save()` after accessing `serializer.data`.if need access data before committing database inspect 'serializer.validated_data' instead. i don't see editing serializer.data object. th...
Read more

Why does Go error when trying to marshal this JSON? -

-
i'm trying rather simple example of trying decode json file structs using golang. however, when attempting error that json: cannot unmarshal object go value of type []main.track which don't understand. here's code in question, , json can found here . package main import ( "encoding/json" "fmt" "net/http" "os" ) // tracks group of track types type tracks struct { tracks []track } // track represents singular track type track struct { name string url string artist artist } // artist represents single artist type artist struct { name string mbid string url string } func main() { url := "http://ws.audioscrobbler.com/2.0/?method=geo.gettoptracks&api_key=c1572082105bd40d247836b5c1819623&format=json&country=netherlands" response, err := http.get(url) if err != nil { fmt.printf("%s\n", err) os.exit(1) } de...
Read more

python - pdfminer - import error -

-
i’m new python , programming in general. i trying install pdfminer. have windows 7 python 2.7 installed. followed instructions when installing (downloaded pdfminer source, unpacked it, , ran setup.py install , installed in c:\pdfminer ) – no errors. it created: build , build\lib,build\lib\pdfminer , copied files build\lib\pdfminer . created build\scripts-2.7 , copied tools\pdf2txt.py , dymppdf.py scripts , wrote install-egg-info , had no errors install. when try running test document command line: c:\pdfminer\pdfminer-20140328> pdf2txt.py samples/simple1.pdf i get: file “c:\python27\scripts\pdf2txt.py”, line3, in <module> pdfminer.pdfdocument import pdfdocument importerror: no module named pdfminer.pdfdocument i saw post: pdfminer - importerror: no module named pdfminer.pdfdocument and tried following (#1..put sys.path.append… pdf2txt.py ) , same error. the system variables include path ( pdfminer\pdfminer-20140328 ). i’ve looked other soluti...
Read more