How to parse this string received from TMDB in iOS

StackOverflow https://stackoverflow.com/questions/22729859

  •  23-06-2023
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Question

I am getting the popular movie data from TMDB in my iOS App. however i am having great trouble in parsing and getting the meaningful data from it. I am totally new to iOS. i have done similar thing in Windows Phone, where i created Poco's and used DataContractJsonSerializer to parse the data. but i am not getting any idea on how to do this in iOS. I want to retrieve id, original_title and poster path from this string.

this is the data i am getting
{
buffer =     {
    0 = 123;
    1 = 34;
    10 = 34;
    100 = 114; 
        3451 = 34;
        3452 = 58;
        3453 = 52;
        3454 = 54;
        3455 = 46;
        3456 = 55;
        3457 = 50;
        3458 = 49;
        3459 = 54;
        346 = 110;
        3460 = 49;
        3461 = 48;

      // lot of number in between 
        977 = 87;
        978 = 75;
        979 = 68;
        98 = 34;
        980 = 108;
        981 = 51;
        982 = 88;
        983 = 97;
        984 = 98;
        985 = 99;
        986 = 112;
        987 = 72;
        988 = 82;
        989 = 110;
        99 = 111;
        990 = 110;
        991 = 76;
        992 = 77;
        993 = 75;
        994 = 102;
        995 = 85;
        996 = 46;
        997 = 106;
        998 = 112;
        999 = 103;
        length = 5810;
    };
};
cookies =     {
};
data =     {
    page = 1;
    results =         (
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            adult = 0;
            "backdrop_path" = "/AdRL6c4BoMJgk7ZFUB2oUVzav2p.jpg";
            id = 41602;
            "original_title" = "The Necessary Death of Charlie Countryman";
            popularity = "110.726084305053";
            "poster_path" = "/fSwdCCGmO50IMaH4XMAixjclLDF.jpg";
            "release_date" = "2013-11-15";
            title = "The Necessary Death of Charlie Countryman";
            "vote_average" = "7.5";
            "vote_count" = 37;
        },
                    {
            adult = 0;
            "backdrop_path" = "/mrvlpJFAzKwZZkLm9VD7Rh2VECi.jpg";
            id = 116745;
            "original_title" = "The Secret Life of Walter Mitty";
            popularity = "64.2212199623452";
            "poster_path" = "/v3e1LdwTXupH9L78eIWCKBjclhJ.jpg";
            "release_date" = "2013-12-25";
            title = "The Secret Life of Walter Mitty";
            "vote_average" = "7.2";
            "vote_count" = 124;
        },
                    {
            adult = 0;
            "backdrop_path" = "/8aZHR0wXacn5DVYK3cS2ozWYPCN.jpg";
            id = 64686;
            "original_title" = "47 Ronin";
            popularity = "95.9101659814315";
            "poster_path" = "/v9JCVROrdlHZCWP3D6pnV8Xc29w.jpg";
            "release_date" = "2013-12-25";
            title = "47 Ronin";
            "vote_average" = "6.5";
            "vote_count" = 81;
        },
                    {
            adult = 0;
            "backdrop_path" = "/zZTyJ6fbWKDl3XabcpHRnnLMKfU.jpg";
            id = 249397;
            "original_title" = "Nymphomaniac: Vol. II";
            popularity = "94.03616025076791";
            "poster_path" = "/pCW6krILJ2L0rXDXH0715teKTtm.jpg";
            "release_date" = "2014-03-20";
            title = "Nymphomaniac: Vol. II";
            "vote_average" = "6.8";
            "vote_count" = 11;
        },
                    {
            adult = 0;
            "backdrop_path" = "/hyR7Fs6Tepgu3yCQGtgO4Ilz9tY.jpg";
            id = 57158;
            "original_title" = "The Hobbit: The Desolation of Smaug";
            popularity = "88.3637510164635";
            "poster_path" = "/gQCiuxGsfiXH1su6lp9n0nd0UeH.jpg";
            "release_date" = "2013-12-13";
            title = "The Hobbit: The Desolation of Smaug";
            "vote_average" = "7.6";
            "vote_count" = 434;
        },
                    {
            adult = 0;
            "backdrop_path" = "/cAhCDpAq80QCeQvHytY9JkBalpH.jpg";
            id = 109445;
            "original_title" = Frozen;
            popularity = "69.4628746979819";
            "poster_path" = "/jIjdFXKUNtdf1bwqMrhearpyjMj.jpg";
            "release_date" = "2013-11-19";
            title = Frozen;
            "vote_average" = "7.7";
            "vote_count" = 348;
        },
                    {
            adult = 0;
            "backdrop_path" = "/rP36Rx5RQh0rmH2ynEIaG8DxbV2.jpg";
            id = 106646;
            "original_title" = "The Wolf of Wall Street";
            popularity = "64.6183486216064";
            "poster_path" = "/wAgdJRx4uZ0u4uzu34NOMvtjLAR.jpg";
            "release_date" = "2013-12-25";
            title = "The Wolf of Wall Street";
            "vote_average" = "7.9";
            "vote_count" = 330;
        },
                    {
            adult = 0;
            "backdrop_path" = "/r7Lmi2Jj1CJLdipYtLEU5iA4SB5.jpg";
            id = 64807;
            "original_title" = "Grudge Match";
            popularity = "59.9853953814402";
            "poster_path" = "/vzIIna3nvQAVGBBXbZgzvPSxg36.jpg";
            "release_date" = "2013-12-25";
            title = "Grudge Match";
            "vote_average" = "6.6";
            "vote_count" = 16;
        },
                    {
            adult = 0;
            "backdrop_path" = "/mnxWdWTP3jbfxC4oaPrwevwvOZ2.jpg";
            id = 53182;
            "original_title" = "300: Rise of an Empire";
            popularity = "49.8372271195572";
            "poster_path" = "/d4kPMHsoTEH3FIkBDJM0uVOlas6.jpg";
            "release_date" = "2014-03-07";
            title = "300: Rise of an Empire";
            "vote_average" = "6.6";
            "vote_count" = 102;
        },
                    {
            adult = 0;
            "backdrop_path" = "/rO75nODBBmJx4u5ZRy2BsGFgbO7.jpg";
            id = 177494;
            "original_title" = "Veronica Mars";
            popularity = "48.7870515185193";
            "poster_path" = "/nS3L07mQfcNJcisLEKgi8fWoBS1.jpg";
            "release_date" = "2014-03-14";
            title = "Veronica Mars";
            "vote_average" = "7.2";
            "vote_count" = 19;
        },
                    {
            adult = 0;
            "backdrop_path" = "/iJtq3PHsLgjcYIrNlT2glzEdBo5.jpg";
            id = 110415;
            "original_title" = Snowpiercer;
            popularity = "47.3945315956173";
            "poster_path" = "/3J4QoMpQYE2MehOTQG9X2KUP4aq.jpg";
            "release_date" = "2013-08-01";
            title = Snowpiercer;
            "vote_average" = "7.2";
            "vote_count" = 29;
        },
                    {
            adult = 0;
            "backdrop_path" = "/qMDiCjxfv6Y8JN2DFViTX5D1ORH.jpg";
            id = 24253;
            "original_title" = "Flickan som lekte med elden";
            popularity = "46.7216104479466";
            "poster_path" = "/qHRpU2d9NWB0WDulwgFwg6a9JRK.jpg";
            "release_date" = "2009-09-18";
            title = "The Girl Who Played with Fire";
            "vote_average" = "6.8";
            "vote_count" = 141;
        },
                    {
            adult = 0;
            "backdrop_path" = "/1DfcGAQ4EVIZFnveo1IzHFtgFTS.jpg";
            id = 175112;
            "original_title" = "The Pirate Fairy";
            popularity = "46.03463240154";
            "poster_path" = "/6VmPnBPDCTbpZ3Jj5lbgHD10IZm.jpg";
            "release_date" = "2014-04-01";
            title = "The Pirate Fairy";
            "vote_average" = "7.6";
            "vote_count" = 5;
        },
                    {
            adult = 0;
            "backdrop_path" = "/1RTiQXeHoEMXkZNWaB8W5uaEZ2.jpg";
            id = 205220;
            "original_title" = Philomena;
            popularity = "45.1210557523094";
            "poster_path" = "/6BTXHupSPkrwsoz4Br6qwwSVmhj.jpg";
            "release_date" = "2013-11-27";
            title = Philomena;
            "vote_average" = "7.5";
            "vote_count" = 31;
        },
                    {
            adult = 0;
            "backdrop_path" = "/wRCPG1lsgfTFkWJ7G3eWgxCgv0C.jpg";
            id = 101299;
            "original_title" = "The Hunger Games: Catching Fire";
            popularity = "41.4568100606251";
            "poster_path" = "/tAhSyLxpaZJCr1oc2a3flvC2B7x.jpg";
            "release_date" = "2013-11-22";
            title = "The Hunger Games: Catching Fire";
            "vote_average" = "7.7";
            "vote_count" = 518;
        },
                    {
            adult = 0;
            "backdrop_path" = "/hz3JfAikYXtaNWIJhWM4p5sy5OZ.jpg";
            id = 49047;
            "original_title" = Gravity;
            popularity = "40.0573419755177";
            "poster_path" = "/2gPjLWIyrWlAn2DgKMOKTBnZYyO.jpg";
            "release_date" = "2013-10-04";
            title = Gravity;
            "vote_average" = "7.9";
            "vote_count" = 751;
        },
                    {
            adult = 0;
            "backdrop_path" = "/3FweBee0xZoY77uO1bhUOlQorNH.jpg";
            id = 76338;
            "original_title" = "Thor: The Dark World";
            popularity = "38.5511611536454";
            "poster_path" = "/aROh4ZwLfv9tmtOAsrnkYTbpujA.jpg";
            "release_date" = "2013-11-08";
            title = "Thor: The Dark World";
            "vote_average" = "7.1";
            "vote_count" = 503;
        },
                    {
            adult = 0;
            "backdrop_path" = "/dNPmXYRS3nN4vD7MLtz5lP79DCB.jpg";
            id = 11824;
            "original_title" = "Teen Wolf";
            popularity = "37.546317184227";
            "poster_path" = "/3TKJbKNpHvRP8YVnwbgfok41AAC.jpg";
            "release_date" = "1985-08-23";
            title = "Teen Wolf";
            "vote_average" = "7.1";
            "vote_count" = 31;
        },
                    {
            adult = 0;
            "backdrop_path" = "/kJzvjhJP6Xf7QQofVl3y0NvpwmI.jpg";
            id = 256731;
            "original_title" = "Bad Country";
            popularity = "37.123709776744";
            "poster_path" = "/6bjfGrtUYmuZzFCia3TcvY0Kz1e.jpg";
            "release_date" = "2014-03-10";
            title = "Bad Country";
            "vote_average" = "5.5";
            "vote_count" = 3;
        },
                    {
            adult = 0;
            "backdrop_path" = "/6Ace8kIosYGnAiJUHgbLO4MNI6k.jpg";
            id = 77067;
            "original_title" = DeadHeads;
            popularity = "36.41";
            "poster_path" = "/A7kD47MEXywqKPeKHrxBfkvPTqy.jpg";
            "release_date" = "2011-04-29";
            title = DeadHeads;
            "vote_average" = "5.8";
            "vote_count" = 6;
        }
    );
    "total_pages" = 7848;
    "total_results" = 156953;
};
headers =     {
    "Access-Control-Allow-Origin" = "*";
    Age = 3350;
    "Cache-Control" = "public, max-age=14400";
    Connection = "keep-alive";
    "Content-Length" = 5810;
    "Content-Type" = "application/json;charset=utf-8";
    Date = "Sat, 29 Mar 2014 10:14:03 GMT";
    ETag = "\"76070c8ebb216a66cbbc36e56c1407fa\"";
    Server = nginx;
    Status = "200 OK";
    Vary = "Accept-Encoding";
    Via = "1.0 localhost (squid/3.1.19)";
    "X-Apiary-Ratelimit-Limit" = 120;
    "X-Apiary-Ratelimit-Remaining" = 119;
    "X-Apiary-Transaction-Id" = 53369cebed260702000005cc;
    "X-Cache" = "HIT from localhost";
    "X-Cache-Lookup" = "HIT from localhost:3128";
    "X-Memc" = HIT;
    "X-Memc-Age" = 12648;
    "X-Memc-Expires" = 1752;
    "X-Memc-Key" = eb13032fb1ef09086dcaac2d14c098c0;
};
status = 200;
text = "{\"page\":1,\"results\":[{\"adult\":false,\"backdrop_path\":\"/AdRL6c4BoMJgk7ZFUB2oUVzav2p.jpg\",\"id\":41602,\"original_title\":\"The Necessary Death of Charlie Countryman\",\"release_date\":\"2013-11-15\",\"poster_path\":\"/fSwdCCGmO50IMaH4XMAixjclLDF.jpg\",\"popularity\":110.726084305053,\"title\":\"The Necessary Death of Charlie Countryman\",\"vote_average\":7.5,\"vote_count\":37},{\"adult\":false,\"backdrop_path\":\"/mrvlpJFAzKwZZkLm9VD7Rh2VECi.jpg\",\"id\":116745,\"original_title\":\"The Secret Life of Walter Mitty\",\"release_date\":\"2013-12-25\",\"poster_path\":\"/v3e1LdwTXupH9L78eIWCKBjclhJ.jpg\",\"popularity\":64.2212199623452,\"title\":\"The Secret Life of Walter Mitty\",\"vote_average\":7.2,\"vote_count\":124},{\"adult\":false,\"backdrop_path\":\"/8aZHR0wXacn5DVYK3cS2ozWYPCN.jpg\",\"id\":64686,\"original_title\":\"47 Ronin\",\"release_date\":\"2013-12-25\",\"poster_path\":\"/v9JCVROrdlHZCWP3D6pnV8Xc29w.jpg\",\"popularity\":95.9101659814315,\"title\":\"47 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uuid = "bb4cca64-b0c4-0308-b92f-49980466092c";

} The code that i tried till now

[MYCloud callFunctionInBackground:@"popularMovie"
                   withParameters:@{@"movie": @" "}
                            block:^(id response, NSError *error) {
                                if (!error) {
                                    // ratings is 4.5
                                    NSArray *movieArray;
                                    movieArray = [response allValues];
                                    NSDictionary *firstObject = [movieArray objectAtIndex:0];
                                    NSDictionary *entities = [firstObject objectForKey:@"results"];

                                    NSLog(@"json :%@",[response description]);

it crashes at NSDictionary *entities = [firstObject objectForKey:@"results"];

====================================================================================== this is the crash log on trying 

NSDictionary *blah = [NSJSONSerialization JSONObjectWithData:response options:0 error:nil];


2014-03-29 16:21:48.572 Moviez[6804:60b] -[__NSDictionaryM bytes]: unrecognized selector sent to instance 0x9daf000

2014-03-29 16:21:48.575 Moviez[6804:60b] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSDictionaryM bytes]: unrecognized selector sent to instance 0x9daf000' * First throw call stack: ( 0 CoreFoundation 0x026271e4 exceptionPreprocess + 180 1 libobjc.A.dylib 0x023a68e5 objc_exception_throw + 44 2 CoreFoundation 0x026c4243 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275 3 CoreFoundation 0x0261750b __forwarding + 1019 4 CoreFoundation 0x026170ee _CF_forwarding_prep_0 + 14 5 Foundation 0x020ec4bc -[_NSJSONReader findEncodingFromData:withBOMSkipLength:] + 36 6 Foundation 0x020ec66b -[_NSJSONReader parseData:options:] + 63 7 Foundation 0x020ecc30 +[NSJSONSerialization JSONObjectWithData:options:error:] + 161 8 Moviez 0x00002884 32-[HILViewController viewDidLoad]_block_invoke + 212 9 Moviez 0x00053f47 __40-[PFTask thenCallBackOnMainThreadAsync:]_block_invoke_2 + 241 10 libdispatch.dylib 0x02c7a7b8 _dispatch_call_block_and_release + 15 11 libdispatch.dylib 0x02c8f4d0 _dispatch_client_callout + 14 12 libdispatch.dylib 0x02c7d726 _dispatch_main_queue_callback_4CF + 340 13 CoreFoundation 0x0268c43e __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 14 14 CoreFoundation 0x025cd5cb __CFRunLoopRun + 1963 15 CoreFoundation 0x025cc9d3 CFRunLoopRunSpecific + 467 16 CoreFoundation 0x025cc7eb CFRunLoopRunInMode + 123 17 GraphicsServices 0x0420b5ee GSEventRunModal + 192 18 GraphicsServices 0x0420b42b GSEventRun + 104 19 UIKit 0x01066f9b UIApplicationMain + 1225 20 Moviez 0x00002ded main + 141 21 libdyld.dylib 0x02ec4701 start + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException

Was it helpful?

Solution

UPDATED to match the full data you are getting

As you say response is already an NSDictionary so your code should be something like this...

// Results is an Array of movie entries
NSDictionary *movieData = [response objectForKey:@"data"];
NSArray * movieArray = [movieData objectForKey:@"results"];
NSDictionary *firstObject = [movieArray objectAtIndex:0];

Or in modern objective c you could do

NSDictionary *movieData = response[@"data"];
NSArray * movieArray = movieData[@"results"];
NSDictionary *firstObject = movieArray[0];

Or if you are really confident its always going to contain something you could do

NSDictionary *firstObject = response[@"data"][@"results"][0];

(I think)

OTHER TIPS

Well the top level object is an NSDictionary.

So...

NSDictionary *blah = [NSJSONSerialization JSONObjectWithData:theData options:0 error:nil];

That will turn the data into an object that you can use.

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