ios - NSDictionary valueForKeyPath returns nill even the keypath exists -


here 2 lines app. first 1 works , value "le-05330" on label second 1 nil. doing wrong second line?

//working self.lblserialno.text = [self.partinfo valueforkeypath:@"veri.parca_bilgisi.referans_no"];  //valueforkeypath returns nil label empty. self.lblcertno.text = [self.partinfo valueforkeypath:@"veri.sertifika.sertifika_no"];

the json data on self.partinfo object below;

{     "durum": true,     "hata": "",     "veri": {         "parca_bilgisi": {             "imaj": "http://www.mywebsite.com:9898/mobapp/images/arac_hasar/arac-onsolkapi.jpg",             "parca_tanimi": "Ön sol kapi",             "marka": "mybrand",             "marka_kodu": "70",             "model": "mymodel",             "model_kodu": "?",             "yil": "2005",             "uretici": "mymanufacturer.",             "referans_no": "le-05330",             "oem_no": "999999",             "durum": "3",             "durum_aciklama": "transferred_to_supplier"         },         "onarim_servis_bilgileri": {             "servis_adi": "?",             "iletisim_no": "?",             "islem_tarihi": "?",             "hasar_dosya_no": "?"         },         "sigorta_bilgileri": {             "firma_adi": "?",             "iletisim_no": "?",             "ilgili_kisi": "?"         },         "eksper_bilgileri": {             "onaylama_tarihi": "?"         },         "uretici_bilgileri": {             "firma": "my firm as.",             "imaj": "harita.jpg",             "adres": "carrer de jacint verdaguer, 58, 08970",             "eposta": "myr@email.es",             "tel": "+36 56565 345 317",             "web": "www.styaasira.es",             "kayit_tarihi": "7.7.2017 13:27:44",             "durum": "3"         },         "sertifika": {             "sertifikasyon_kurulusu": "87",             "sertifika_no": "87",             "gecerlilik_tarihi": "87"         }     } }

my code retrieving nsdictionary (dict)

nsurlsessiondatatask* task = [session datataskwithrequest:request completionhandler:^(nsdata *data, nsurlresponse *response, nserror *error) {                if (error == nil) {             // success             nsmutabledictionary* dict = [nsjsonserialization                                            jsonobjectwithdata:data                                            options:kniloptions                                            error:&error];

i eliminated service call, , tried same json string, still no chance...

nsstring *json = ...      nserror *error;     nsdata *data = [json datausingencoding:nsutf8stringencoding];     nsdictionary* dict = [nsjsonserialization jsonobjectwithdata:data                                                          options:nsjsonreadingmutableleaves                                                            error:&error];      self.lblissuer.text = [dict valueforkeypath:@"veri.sertifika.sertifikasyon_kurulusu​"];

after several unsuccessful logical tries, decided focus on data , tried modify(simplfy) json object , try see if works on different key names. first changed name of node "sertifika" "test" , 3 sub node names "a", "b" , "c". state able value using valueforkeypath. then, changed name of nodes original, , worked!!! commented out reading json constant string service response,... wait it... worked!!!....

can tell logical going on? there sort of hashing mechanism nsdictionary had gone crazy? anyway, changing node names fails , original has solved problem...


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