iOS Parse Inner Json - ios

Question

Hi I have the following json that i need to parse, however, I'm struggling to parse the inner array. What I have currently just prints each of the inner arrays but I'd like to print say each title and add the titles to an array. Thank you for any help!
JSON
{"nodes":[{
"node":{
"nid":"1420857",
"title":"Title 1",
"votes":"182",
"popular":"True",
"teaser":"Teaser 1"
}},
{"node":{
"nid":"1186152",
"title":"Title 2",
"votes":"140",
"popular":"True",
"teaser":"Teaser 2"
}},
{"node":{
"nid":"299856",
"title":"Title 3",
"votes":"136",
"popular":"True",
"teaser":"Teaser 3"
}}
]}
Json Parser
NSError *error = nil;
NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:#"http://www.somefilename.json"]];
if (jsonData) {
id jsonObjects = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
if (error) {
NSLog(#"error is %#", [error localizedDescription]);
return;
}
NSArray *keys = [jsonObjects allKeys];
for (NSString *key in keys) {
NSLog(#"%#", [jsonObjects objectForKey:key]);
}
} else {
// Handle Error
}

Answer 1

Just typecast it:
NSArray *nodes = (NSArray*)[jsonObjects objectForKey:#"nodes"];
for (NSDictionary *node in nodes){
// do stuff...
}
Methods that return id (like -[objectForKey:], and -[objectAtIndex:]) can return any objective-c object. You'll need to know ahead of time what to typecast it into to perform the appropriate operations on it. JSON is converted to the NSObject equivalents:
object -> NSDictionary
array -> NSArray
string -> NSString
number -> NSNumber
boolean -> NSNumber
float -> NSNumber
null -> NSNull
To differentiate between the various NSNumbers, you'll have to call the appropriate type method: -[intValue], -[boolValue], -[floatValue]. Check out the NSNumber docs for more info.

Answer 2

You can use my method for json parsing,
Parse Method:
-(void)jsonDeserialize:(NSString *)key fromDict:(id)content completionHandler:(void (^) (id parsedData, NSDictionary *fromDict))completionHandler{
if (key==nil && content ==nil) {
completionHandler(nil,nil);
}
if ([content isKindOfClass:[NSArray class]]) {
for (NSDictionary *obj in content) {
[self jsonDeserialize:key fromDict:obj completionHandler:completionHandler];
}
}
if ([content isKindOfClass:[NSDictionary class]]) {
id result = [content objectForKey:key];
if ([result isKindOfClass:[NSNull class]] || result == nil) {
NSDictionary *temp = (NSDictionary *)content;
NSArray *keys = [temp allKeys];
for (NSString *ikey in keys) {
[self jsonDeserialize:key fromDict:[content objectForKey:ikey] completionHandler:completionHandler];
}
}else{
completionHandler(result,content);
}
}
}
Method Call:
NSData *content = [NSData dataWithContentsOfFile:[[NSBundle mainBundle]pathForResource:#"Sample" ofType:#"json"]];
NSError *error;
//to get serialized json data...
id dictionary = [NSJSONSerialization JSONObjectWithData:content options:NSJSONReadingMutableContainers error:&error];
//get data for key called GetInfo
[self jsonDeserialize:#"GetInfo" fromDict:dictionary completionHandler:^(id parsedData, NSDictionary *fromDict) {
NSLog(#"%# - %#",parsedData,fromDict);
}];