IOS JSON parsing

Parse JSON into DIC object

• -(void) Fetcheddata: (nsdata*) responsedata {//parse out the JSON datanserror* error;
• nsdictionary* JSON =[nsjsonserialization
• Jsonobjectwithdata:responsedata //1
• Options:kniloptions
• error:&error];
• nsarray* Latestloans =[json objectforkey:@"loans"]; //2
• NSLog (@"loans:%@", Latestloans); //3
• }
• To generate a JSON string for an object
• Build a Info object and convert to JSON
• nsdictionary* info =[nsdictionary dictionarywithobjectsandkeys:[loan objectforkey:@"name"],
• @"who",
• [(nsdictionary*) [Loan objectforkey:@"location"]
• objectforkey:@"Country"],
• @"where",
• [NSNumber Numberwithfloat:outstandingamount],
• @"What",
• NIL];
• Convert object to Data
• nsdata* Jsondata =[nsjsonserialization Datawithjsonobject:info
• Options:nsjsonwritingprettyprinted error:&error];
• Print out the data contents
• Jsonsummary.text =[[nsstring Alloc] Initwithdata:jsondata
• Encoding:nsutf8stringencoding];
• Add JSON method to dic
• @interfaceNSDictionary (jsoncategories)
• + (nsdictionary*) dictionarywithcontentsofjsonurlstring: (nsstring*) urladdress;
• -(nsdata*) ToJSON;
• @end
• @implementationNSDictionary (jsoncategories)
• + (nsdictionary*) dictionarywithcontentsofjsonurlstring: (nsstring*) urladdress{
• nsdata* data =[nsdata Datawithcontentsofurl:[nsurl urlwithstring:urladdress];
• __autoreleasing nserror* error =nil;
• ID result =[nsjsonserialization Jsonobjectwithdata:data
• Options:kniloptions error:&error];
• if (Error!=nil) Returnnil;
• return result;
• }
• -(nsdata*) tojson{
• nserror* error =nil;
• ID result =[nsjsonserialization datawithjsonobject:self
• Options:kniloptions error:&error];
• if (Error!=nil) Returnnil;
• return result;
• }@end
• Use the
• nsdictionary* myinfo =[nsdictionary dictionarywithcontentsofjsonurlstring:@"Http://www.yahoo.com/news.json"];
• nsdictionary* information =[nsdictionary dictionarywithobjectsandkeys:@"Orange" @"Apple" @ "Banana" @  "Fig", nil];
• nsdata* JSON =[information ToJSON];
• Determine if JSON is possible
• BOOL Isturnabletojson =[nsjsonserialization Isvalidjsonobject:object]

IOS JSON parsing