ios - Check if an array of NSDictionary contains a NSDictionary -

in app i've check if in array of nsdictionary there nsdictionary. in other words, made json file , store in documents.
i'm parsing json insert new entry, before insert entry in json need check if entry it's stored in file. parsed json so:

// first read json file folder documents nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes); nsstring *documentsdirectory = [paths objectatindex:0]; nsstring *filepath = [documentsdirectory stringbyappendingpathcomponent:@"data.json"]; nsstring *content = [nsstring stringwithcontentsoffile:filepath encoding:nsutf8stringencoding error:null]; nsdata *data = [content datausingencoding:nsutf8stringencoding]; nsdictionary *dictcontent = [nsjsonserialization jsonobjectwithdata:data options:kniloptions error:nil]; // json parsing nsmutablearray *array = [[nsmutablearray alloc]init]; nsmutablearray *arrayofdictdata = [[nsmutablearray  alloc]init]; if (dictcontent) {   nsdictionary *sites = [dictcontent objectforkey:@"sites"];   nsarray *site = [sites objectforkey:@"site"];   array = [site mutablecopy]; } 

then i've nsdictionary (dictforjson) in inserted data parsed html site, need check if data in dictionary dictforjson still in json file.
how can check that?

the dictforjson has structure:

dictforjson = @{@"name": htmltitle,                     @"src": path,                     @"expirydate": expiredate}; 

the nsarray site has structure:

site: (         {         expirydate = "29 ago 2013";         name = sito4;         src = "/users/redoddity/library/application support/iphone simulator/6.1/applications/2d9ebe71-4365-448d-8ad2-a08749b8dbc1/documents/sito4.html";     } ) 

have idea? tried [array containsobject:dictforjson], nsdictionary isn't ordered when use method returns 0 , other times returns 1 maybe it's useful build json following code:

- (void)jsoncreateoredit {     nsdictionary *dictsites = [[nsdictionary alloc]init];      nsdictionary *dictsite = [[nsdictionary alloc]init];      nsmutablearray *site = [[nsmutablearray alloc]init];      nsdictionary *dictforjson = [[nsdictionary alloc]init];      dictforjson = @{@"name": htmltitle,                     @"src": path,                     @"expirydate": expiredate};      nsstring* documentspath = [nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes) objectatindex:0];     nsstring *filepath = [documentspath stringbyappendingpathcomponent:@"data.json"];     bool fileexist = [[nsfilemanager defaultmanager] fileexistsatpath:filepath];      if (!fileexist) {         [site addobject:dictforjson];         dictsite = @{@"site": site};         dictsites = @{@"sites": dictsite};         // creo il file json         nslog(@"il file non esiste");         sbjsonwriter *writer = [[sbjsonwriter alloc]init];         nsstring *jsoncommand = [writer stringwithobject:dictsites];         [createfile createfilein:documentspath with:@"data.json" anddata:jsoncommand]; // class method made create file     else {         // here there instructions update file data.json          nslog(@"il file esiste");     // leggo il file json     nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);     nsstring *documentsdirectory = [paths objectatindex:0];     nsstring *filepath = [documentsdirectory stringbyappendingpathcomponent:@"data.json"];     nsstring *content = [nsstring stringwithcontentsoffile:filepath encoding:nsutf8stringencoding error:null];     nsdata *data = [content datausingencoding:nsutf8stringencoding];     nsdictionary *dictcontent = [nsjsonserialization jsonobjectwithdata:data options:kniloptions error:nil];     // faccio il parsing del json     nsmutablearray *array = [[nsmutablearray alloc]init];     nsmutablearray *arrayofdictdata = [[nsmutablearray  alloc]init];     if (dictcontent) {         nsdictionary *sites = [dictcontent objectforkey:@"sites"];         nsarray *site = [sites objectforkey:@"site"];         array = [site mutablecopy];         // here must check if in array site there same information i'm trying insert     } } 

nspredicate *apredicate = [nspredicate predicatewithformat:@"%k like[c] %@", @"name", @"htmltitle"]; nsarray *thefilteredarray = [mainarrayofdictionry filteredarrayusingpredicate:apredicate];  if ([thefilteredarray count]){     nslog(@"dictionay exists"); }else{      nslog(@"dictionay not exists"); } 

in first statement first parameter "key" , second parameter actual value of dictionay.

i assuming following :

nsdictionary *dictforjson = @{@"name": htmltitle,                     @"src": path,                     @"expirydate": expiredate};   nsarray *mainarrayofdictionry = (  "dictforjson" : @{@"name": htmltitle,                     @"src": path,                     @"expirydate": expiredate}; ), (), (), (), . . . ) 

*hope you.*array