Parsing JSON objects error - objective-c

Question

I have this JSON.
{
"cnt": 1,
"list": [
{
"object1": [
{
"subobject1": "value1",
"subobject2": "value2",
"subobject3": "value3"
}
],
"object2": {
"subobject1": value1,
"subobject1": value2,
"subobject1": value3
}
}
]
}
I can't get data from the first object. I receive an error
-[__NSArrayM objectForKeyedSubscript:]: unrecognized selector sent to instance 0x7fa281f82520
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKeyedSubscript:]: unrecognized selector sent to instance 0x7fa281f82520'
For the other object I get the data and I can see it in the NSLOG, but can't understand what's the problem with the first one and why the app is crashing.
This is how I parse the json in the DataModel
NSError *deserializationError;
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:data options: NSJSONReadingMutableContainers error: &deserializationError];
NSArray * responseArr = json[#"list"];
NSMutableArray *result = [[NSMutableArray alloc] init];
if(responseArr && [responseArr isKindOfClass:[NSArray class]]) {
for(NSDictionary *cDictionary in responseArr) {
DAObject *cty = [[DAObject alloc] initWithDictionary:ctyDictionary];
if(cty) {
[result addObject:cty];
}
}
}
then In the Object .m file
DAServiceObject *object1 = [[DAServiceObject alloc] initWithDictionary:dictionary[#"object1"]];
self.value1 = object1.value1;
self.value2 = object1.value2;
and the app crashes.

Answer 1

You misinterpreted the data structure: "list" contains an array with only one item, i.e. a dictionary. This dictionary contains an array for each key (e.g. "item1"), again with only one item (again a dictionary).
edit
// ...
if(responseArr && [responseArr isKindOfClass:[NSArray class]]) {
NSDictionary *content = responseArr[0];
for (NSSString *key in [content allKeys]) {
NSDictionary *a = content[key][0];
// ...
}
}

Answer 2

Your JSON data is not an array. It is a dictionary. It's a dictionary with one key "cnt" and one key "list". The object under key "list" is an array.