ios - How to convert UTF8String to JSON based NSDictionary? -

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i getting 1 of web-service response in json. here utf8string base responsestring:

"{\"applicationid\":1,\"currentposition\":0,\"endoffile\":false,\"media\":{\"active\":true,\"description\":\"this video demonstrates quick overview of bentley learn server.\",\"locationid\":1,\"mp4url\":\"http:\\/\\/cdnllnw.bentley.com\\/s\\/learnvideo\\/welcome.mp4?s=1380034262&e=1380077462&h=c2641922fd862ffe5c5a05e94786359a\",\"mediaid\":5003235,\"mediaurl\":\"http:\\/\\/cdnllnw.bentley.com\\/s\\/learnvideo\\/welcome.mp4?s=1380034262&e=1380077462&h=c2641922fd862ffe5c5a05e94786359a\",\"streamserver\":null,\"title\":\"welcome\",\"transferstatus\":0,\"filesize\":9094429},\"mediaduration\":0,\"skippedcurrentposition\":0,\"userbp\":8011512,\"viewedtime\":0}"

after formatting looks like:

{  "applicationid":1,  "currentposition":0,  "endoffile":false,  "media":   {    "active":true,    "description":"this video demonstrates quick overview of bentley learn server.",    "locationid":1,    "mp4url":"http:\/\/cdnllnw.bentley.com\/s\/learnvideo\/welcome.mp4?s=1380035311&e=1380078511&h=d8de8ade046266fb7324be90a575f978",    "mediaid":5003235,    "mediaurl":"http:\/\/cdnllnw.bentley.com\/s\/learnvideo\/welcome.mp4?s=1380035311&e=1380078511&h=d8de8ade046266fb7324be90a575f978",    "streamserver":null,    "title":"welcome",    "transferstatus":0,    "filesize":9094429   },  "mediaduration":0,  "skippedcurrentposition":0,  "userbp":8011512,  "viewedtime":0  }

how can convert string json object or nsdictionary object can access key-values easily.

i have tried this:

nsstring *responsestring = [nsstring stringwithutf8string:response.c_str()];   nsdictionary *jsondict = [nsjsonserialization jsonobjectwithdata: [responsestring datausingencoding:nsutf8stringencoding]                                 options: nsjsonreadingmutablecontainers                                   error: &error];

but says jsondict nil , error description is:

error domain=nscocoaerrordomain code=3840 "the operation couldn’t completed. (cocoa error 3840.)" (json text did not start array or object , option allow fragments not set.) userinfo=0xd8bbd30 {nsdebugdescription=json text did not start array or object , option allow fragments not set.}

please help

adding nsjsonreadingallowfragments option should according error:

nsstring* jsonstring = @"{\"applicationid\":1,\"currentposition\":0,\"endoffile\":false,\"media\":{\"active\":true,\"description\":\"this video demonstrates quick overview of bentley learn server.\",\"locationid\":1,\"mp4url\":\"http:\\/\\/cdnllnw.bentley.com\\/s\\/learnvideo\\/welcome.mp4?s=1380034262&e=1380077462&h=c2641922fd862ffe5c5a05e94786359a\",\"mediaid\":5003235,\"mediaurl\":\"http:\\/\\/cdnllnw.bentley.com\\/s\\/learnvideo\\/welcome.mp4?s=1380034262&e=1380077462&h=c2641922fd862ffe5c5a05e94786359a\",\"streamserver\":null,\"title\":\"welcome\",\"transferstatus\":0,\"filesize\":9094429},\"mediaduration\":0,\"skippedcurrentposition\":0,\"userbp\":8011512,\"viewedtime\":0}";  nserror* error = nil; nsdictionary *jsondict = [nsjsonserialization jsonobjectwithdata: [responsestring datausingencoding:nsutf8stringencoding]                             options: nsjsonreadingmutablecontainers | nsjsonreadingallowfragments                               error: &error];

but means nsstring pasted in question contains characters not following json format. if add more code take value (file, web) - can more make valid. until treat answer workaround :)

the formatted string should be:

{\"applicationid\":1,\"currentposition\":0,\"endoffile\":false,\"media\":{\"active\":true,\"description\":\"this video demonstrates quick overview of bentley learn server.\",\"locationid\":1,\"mp4url\":\"http:\\/\\/cdnllnw.bentley.com\\/s\\/learnvideo\\/welcome.mp4?s=1380034262&e=1380077462&h=c2641922fd862ffe5c5a05e94786359a\",\"mediaid\":5003235,\"mediaurl\":\"http:\\/\\/cdnllnw.bentley.com\\/s\\/learnvideo\\/welcome.mp4?s=1380034262&e=1380077462&h=c2641922fd862ffe5c5a05e94786359a\",\"streamserver\":null,\"title\":\"welcome\",\"transferstatus\":0,\"filesize\":9094429},\"mediaduration\":0,\"skippedcurrentposition\":0,\"userbp\":8011512,\"viewedtime\":0}

without " @ beggining , @ end. maybe that's reason. if loading web - make sure don't have js included or headers , confirm web service responds json format in headers.


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