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我有一个从 JSON 文件创建的 NSArray。
如果我只是将数组打印到控制台，我会得到以下输出：
单击我。

文件第一部分：

{
    result =     {
        "attribute_controlled_attached_particles" =         (
                        {
                "attach_to_rootbone" = 0;
                id = 1;
                name = "Partikel 1";
                system = "burningplayer_red";
            },
                        {
                "attach_to_rootbone" = 0;
                id = 2;
                name = "Fliegende Teile";
                system = "burningplayer_flyingbits";
            },
                        {
                "attach_to_rootbone" = 0;
                attachment = muzzle1;
                id = 3;
                name = "Nemesis-Explosion";
                system = "particle_nemesis_burst_blue";
            },
                        {
                "attach_to_rootbone" = 0;
                id = 4;
                name = "Community-Glitzer";
                system = "community_sparkle";
            },
                        {
                "attach_to_rootbone" = 0;
                attachment = halopoint1;
                id = 5;
                name = Heiligenschein;
                system = halopoint;
            },
                        {
                "attach_to_rootbone" = 0;
                id = 6;
                name = "Gr\U00fcnes Konfetti";
                system = "superrare_confetti_green";
            },
                        {
                "attach_to_rootbone" = 0;
                id = 7;
                name = "Lila Konfetti";
                system = "superrare_confetti_purple";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 8;
                name = "Spukende Geister";
                system = "superrare_ghosts";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 9;
                name = "Gr\U00fcne Energieladung";
                system = "superrare_greenenergy";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 10;
                name = "Lila Energieladung";
                system = "superrare_purpleenergy";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 11;
                name = "Kreisendes TF-Logo";
                system = "superrare_circling_tf";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 12;
                name = Fliegenschwarm;
                system = "superrare_flies";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 13;
                name = "Brennende Flammen";
                system = "superrare_burning1";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = unusual;
                id = 14;
                name = "Sengende Flammen";
                system = "superrare_burning2";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 15;
                name = "Gl\U00fchendes Plasma";
                system = "superrare_plasma1";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 16;
                name = "Lebendiges Plasma";
                system = "superrare_plasma2";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 17;
                name = Sonnenstrahlen;
                system = "superrare_beams1";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 18;
                name = "Kreisendes Friedenszeichen";
                system = "superrare_circling_peacesign";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 19;
                name = "Kreisendes Herz";
                system = "superrare_circling_heart";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 20;
                name = "Karten-Briefmarken";
                system = "stamp_spin";
            },
                        {
                "attach_to_rootbone" = 0;
                attachment = "cig_drg_smoke";
                id = 28;
                name = "Eleganter Rauch";
                system = "drg_pipe_smoke";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 29;
                name = "St\U00fcrmischer Sturm";
                system = "unusual_storm";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 30;
                name = "Eisiger Sturm";
                system = "unusual_blizzard";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 31;
                name = "Muttern & Bolzen";
                system = "unusual_orbit_nutsnbolts";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 32;
                name = "Kreisende Planeten";
                system = "unusual_orbit_planets";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 33;
                name = "Kreisendes Feuer";
                system = "unusual_orbit_fire";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 34;
                name = Blubbern;
                system = "unusual_bubbles";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 35;
                name = Rauchen;
                system = "unusual_smoking";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 36;
                name = Dampfen;
                system = "unusual_steaming";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 37;
                name = "Brennende Laterne";
                system = "unusual_orbit_jack_flaming";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 38;
                name = "Bew\U00f6lkter Mond";
                system = "unusual_fullmoon_cloudy";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 39;
                name = "Blubbernder Kessel";
                system = "unusual_bubbles_green";
            },
                        {
                "attach_to_rootbone" = 1;
                id = 40;
                name = "Schauriges, kreisendes Feuer";
                system = "unusual_orbit_fire_dark";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 43;
                name = Messersturm;
                system = "unusual_storm_knives";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 44;
                name = "Nebliger Sch\U00e4del";
                system = "unusual_skull_misty";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 45;
                name = Herbstmond;
                system = "unusual_fullmoon_cloudy_green";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 46;
                name = "Es ist ein Geheimnis f\U00fcr jeden";
                system = "unusual_fullmoon_cloudy_secret";
            },
                        {
                "attach_to_rootbone" = 1;
                attachment = muzzle;
                id = 47;
                name = "St\U00fcrmische 13. Stunde";
                system = "unusual_storm_spooky";
            }
        );
        attributes =         (
                        {
                "attribute_class" = "mult_dmg";
                defindex = 1;
                "description_format" = "value_is_percentage";
                "description_string" = "%s1%\U00a0geringerer Schaden";
                "effect_type" = negative;
                hidden = 0;
                "max_value" = "0.85";
                "min_value" = "0.95";
                name = "damage penalty";
                "stored_as_integer" = 0;
            },
                        {
                "attribute_class" = "mult_dmg";
                defindex = 2;
                "description_format" = "value_is_percentage";
                "description_string" = "+%s1%\U00a0Schadensbonus";
                "effect_type" = positive;
                hidden = 0;
                "max_value" = "1.1";
                "min_value" = "1.05";
                name = "damage bonus";
                "stored_as_integer" = 0;
            },
                        {
                "attribute_class" = "mult_clipsize";
                defindex = 3;
                "description_format" = "value_is_percentage";
                "description_string" = "%s1%\U00a0Magazingr\U00f6\U00dfe";
                "effect_type" = negative;
                hidden = 0;
                "max_value" = "0.75";
                "min_value" = "0.9";
                name = "clip size penalty";
                "stored_as_integer" = 0;
            },
                        {
                "attribute_class" = "mult_clipsize";
                defindex = 4;
                "description_format" = "value_is_percentage";
                "description_string" = "+%s1%\U00a0Magazingr\U00f6\U00dfe";
                "effect_type" = positive;
                hidden = 0;
                "max_value" = "1.1";
                "min_value" = "1.05";
                name = "clip size bonus";
                "stored_as_integer" = 0;
            },
                        {
                "attribute_class" = "mult_postfiredelay";
                defindex = 5;
                "description_format" = "value_is_inverted_percentage";
                "description_string" = "%s1%\U00a0niedrigere Schussfrequenz";
                "effect_type" = negative;
                hidden = 0;
                "max_value" = "1.25";
                "min_value" = "1.05";
                name = "fire rate penalty";
                "stored_as_integer" = 0;
            },
                        {
                "attribute_class" = "mult_postfiredelay";
                defindex = 6;
                "description_format" = "value_is_inverted_percentage";
                "description_string" = "+%s1%\U00a0h\U00f6here Schussfrequenz";
                "effect_type" = positive;
                hidden = 0;
                "max_value" = "0.9";
                "min_value" = "0.95";
                name = "fire rate bonus";
                "stored_as_integer" = 0;
            },
                        {
                "attribute_class" = "mult_medigun_healrate";
                defindex = 7;
                "description_format" = "value_is_percentage";
                "description_string" = "%s1%\U00a0Heilungsrate";
                "effect_type" = negative;
                hidden = 0;
                "max_value" = "0.8";
                "min_value" = "0.95";
                name = "heal rate penalty";
                "stored_as_integer" = 0;
            },
                        {
                "attribute_class" = "mult_medigun_healrate";
                defindex = 8;
                "description_format" = "value_is_percentage";
                "description_string" = "+%s1%\U00a0Heilungsrate";
                "effect_type" = positive;
                hidden = 0;
                "max_value" = "1.15";
                "min_value" = "1.05";
                name = "heal rate bonus";
                "stored_as_integer" = 0;
            },

我的问题是：如何在索引中获取项目的名称？

我试过了

[[[[news objectAtIndex:0]objectForKey:@"items"]objectAtIndex:2] objectForKey:@"name"];

News 是包含 Data 的数组！

希望你能帮助蒂姆

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3 回答 3

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您似乎有一本由几个字典数组组成的字典。我认为您想要这样的东西...（编辑：就像评论中提到的那样，这取决于您需要从中获取名称的字典数组，因为结果中似乎有几个可供选择）。

NSArray *array = [resultDictionary objectForKey:@"attribute_controlled_attached_particles"];

for (NSDictionary *aDictionary in array){
    NSString *name = [aDictionary objectForKey:@"name"];
   // do what you want with the string...
   // could be useful if you for instance need to make an array of all the names
}

或者当然：

NSString *someString = [[array objectAtIndex:3] objectForKey:@"name"];
于 2013-02-02T12:59:02.223 回答
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你有一个包含另一个字典的字典（不是一个聪明的主意），所以你应该使用 objectForKey: 选择器在其中获取字典。现在，如果您能够获取字典的键值，那么执行 N 次就不会出现问题。

[] 运算符允许您访问数组/字典的值，它的工作方式类似于 objectAtIndex:/valueForKey: 。这是如何做到的： 

NSDictionary* result= json[@"result"];
NSArray* acabArray= result[@"attribute_controlled_attached_particles"];
for(NSDictionary* acabDict in acabArray)
{
    NSNumber* num= acabDict[@"attach_to_rootbone"];
    NSString* name= acabDict[@"name"];
    // Obtain also the other key-values in a similar way
    // Do what you want with these values, I suggest to build a custom
    // object to hold all these values, and put every object in a mutable array.
}
于 2013-02-02T13:47:22.840 回答
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你有一个NSDictionary包含一个NSDictionary（由“result”NSArray键控）包含一个（由“attribute_controlled_attached_pa​​rticles”键控）。要获取此包含数组，您需要执行以下操作：

NSArray *resultArray = [[jsonDictionary objectForKey:@"result"] objectForKey:@"attribute_controlled_attached_particles"];

在 中resultArray，您有一个表示新闻项目的有序字典列表。因此，要获取第一个索引的“名称”字符串，请执行

NSDictionary *itemDictionary = [resultArray objectAtIndex:0];
NSString *name = [itemDictionary objectForKey:@"name"];

要枚举所有项目，您需要遍历 resultArray。

于 2013-02-02T13:48:26.623 回答