IOS Compare two array and get Result - ios

Question

I have below JSON Format:
{
"Get_your_story_answer": [
{
"st_id": "19",
"story_title": "Newone",
"user_fb_id": "1649424812005217",
"winner_fb_id": "1685417121693688",
"winner_fb_id2": "",
"winner_fb_id3": "",
"story": "\ud83d\ude33\ud83d\ude25\ud83d\ude14\ud83d\ude0c",
"status": "1",
"s_created_date": "2016-01-18 23:06:05",
"reply_answer": [
{
"l_id": "42",
"story_id": "19",
"user_fb_id": "1649424812005217",
"selected_user_fb_id": "1685417121693688",
"answer": "hahaha",
"l_rating": "0",
"status": "1",
"l_created_date": "2016-01-18 23:10:51",
"l_new_created_date": "2016-01-19 11:40:51",
"winner": "1",
"answer_user_id": "3",
"answer_fb_id": "1685417121693688",
"answer_user_name": "Kin Patty"
},
{
"l_id": "43",
"story_id": "19",
"user_fb_id": "1649424812005217",
"selected_user_fb_id": "1498304680499454",
"answer": "",
"l_rating": "0",
"status": "1",
"l_created_date": "2016-01-18 23:06:05",
"l_new_created_date": "2016-01-19 11:36:05",
"winner": "0",
"answer_user_id": "10",
"answer_fb_id": "1498304680499454",
"answer_user_name": "John Kingman"
}
]
}
],
"status": "1",
"msg": "Get data"
}
Now I have to get Winner id
for Example "winner_fb_id" from [Get_your_story_answer] and compare it with [reply_answer].
If [reply_answer] contain "winner_fb_id" then I have to take only that name as winner .
Like in my Example , "Kin Patty"
I have tried this ,
//_getwind is mutable array
_getwinnerid =[NSMutableArray new];
_getwinnerid=[[_dataDictionary valueForKey:#"Get_your_story_answer"]valueForKey:#"winner_fb_id"];
Here is _getwinnerid output
<__NSArrayI 0x7ffb5a57c7b0>(
1685417121693688
NSArray *replaydata=[[_dataDictionary valueForKey:#"Get_your_story_answer"]valueForKey:#"reply_answer"];
Here is Replay Data Result
if (![replaydata containsObject:_getwinnerid]) {
NSLog(#"data");
}
Note:- Winner Id will be multiple. so, I have to compare 2 or more winner id and then take name from replay data response. And then I have to set name of winner in UITableview.

Answer 1

The value of Get_your_story_answer is an array, the requested data is in the first item of the array
NSDictionary *getYourStoryAnswer = _dataDictionary[#"Get_your_story_answer"][0];
Now get the winner ID and the array of answers
NSString *winnerID = getYourStoryAnswer[#"winner_fb_id"];
NSArray *answers = getYourStoryAnswer[#"reply_answer"];
Then enumerate the answers array (there are other solutions using blocks etc.)
for (NSDictionary *answer in answers) {
if ([answer[#"answer_fb_id"] isEqualToString: winnerID]) {
NSLog(#"%#", answer[#"answer_user_name"]);
break;
}
}
PS: Never use valueForKey to get one value for a key from a collection type unless you really need (and mean) the KVC method. The designated method is objectForKey or key subscription like above. valueForKey applied to an array returns always an array which is normally not intended.

Answer 2

for this you need to get total winner count from server.
like this.
int winnerCount = 3; //[Get_your_story_answer valueForKey:#"winner_count"];
Hopefully you have a fixed pattern key for winners like winner_fb_id, winner_fb_id1, winner_fb_id2 etc.
This will give you the desired result of winners name in array.
id response; // your response here
NSArray *array = [response objectForKey:#"Get_your_story_answer"];
NSDictionary *Get_your_story_answer = array[0];
NSMutableArray *winnersArray = [[NSMutableArray alloc] init];
int winnerCount = 3; //[Get_your_story_answer valueForKey:#"winner_count"];
for (int i = 0; i< winnerCount; i++) {
NSString *winnerId = nil;
if(i != 0){
winnerId = [Get_your_story_answer valueForKey:[NSString stringWithFormat:#"winner_fb_id%d",i]];
}
else{
winnerId= [Get_your_story_answer valueForKey:[NSString stringWithFormat:#"winner_fb_id"]];
}
if(winnerId)
{
[winnersArray addObject:winnerId];
}
}
__block NSMutableArray *resultArray = [[NSMutableArray alloc] init];
NSArray *replyAnswers = [Get_your_story_answer objectForKey:#"reply_answer"];
[replyAnswers enumerateObjectsUsingBlock: ^(id obj, NSUInteger idx, BOOL *stop) {
NSString *answer_fb_id = [obj valueForKey:#"answer_fb_id"];
[winnersArray enumerateObjectsUsingBlock: ^(NSString * winnerId, NSUInteger idx, BOOL *stop) {
if([winnerId isEqualToString:answer_fb_id]){
// get name of winner
[resultArray addObject:[obj valueForKey:#"answer_user_name"]];
}
}];
}];
// Your name of wiiners are in resultArray.

Answer 3

I have filtered array using the answer as said by larme Thank you.
NSError *errorJSON = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:&errorJSON];
if (!errorJSON)
{
NSDictionary *storyAnwser = [json[#"Get_your_story_answer"] firstObject];
NSArray *allAnswersKeys = [storyAnwser allKeys];
NSArray *allWinnersKeys = [allAnswersKeys filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(NSString * _Nonnull evaluatedObject, NSDictionary<NSString *,id> * _Nullable bindings) {
return [evaluatedObject hasPrefix:#"winner_fb_id"];
}]];
NSLog(#"AllWinnersKeys: %#", allWinnersKeys);
NSArray *allWinnersIds = [storyAnwser objectsForKeys:allWinnersKeys notFoundMarker:[NSNull null]];
NSLog(#"AllWinnersIds: %#", allWinnersIds);
NSArray *allAnswers = storyAnwser[#"reply_answer"];
NSLog(#"AllAnswers: %#", allAnswers);
NSArray *allWinners = [allAnswers filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"answer_fb_id IN %#", allWinnersIds]];
NSLog(#"allWinners: %#", allWinners);
NSArray *allWinersNames = [allWinners valueForKey:#"answer_user_name"];
NSLog(#"AllWinnersNames: %#", allWinersNames);
}
else
{
NSLog(#"Error JSON: %#", errorJSON);
}