读JSON数组

Question

我正在开发iphone应用程序。在这里，我正在阅读一个JSON数组，我已经将其值以数据形式获取到我得到的值，格式如下：

Array : {
global =     {
    players =         {
        1 = "John Doe, A school";
        10 = "Jonathan Doe, Another school";
        2 = "Joe Doe, Another school";
        3 = "Jane Doe, A school";
        4 = "Jay Doe, Another school";
        5 = "Jimmy Doe, A school";
        6 = "Jeremy Doe, Another school";
        7 = "Johnny Doe, A school";
        8 = "Jeremiah Doe, Another school";
        9 = "Jennifer Doe, A school";
    };
    schools =         {
        1 = "A school";
        2 = "Another school";
        3 = "The school";
        4 = "The other school";
        5 = "That school";
    };
    text = "A dynamic text that needs to be displayed to the player.";
};

现在我的问题是我如何阅读全球的每个部分？看完之后我怎么读学校？等...

Answer 1

看看这个问题Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc)

它有一个几乎所有主要JSON解析器的列表。 JSON解析器会将JSON转换为数组/字典，并允许您使用objectForKey和objectAtIndex方法来访问结构。

Answer 2

使用JSONKit。它是更新更好的SBJson版本

Answer 3

使用TouchJSON。它非常易于使用，并提供全面的文档。

Answer 4

就这样做

for (var i in global ) {
  for(var j in global [i].schools ){
    alert(global [i].schools[j]);
  }                   
}

Answer 5

SBJson是另一个很好的Objective-C JSON库。它会将JSON解析为嵌套的NSArray和NSDictionary对象。规范用法如下：

#import "SBJson.h"

NSString *jsonString = @"{
    'name': 'Simon', 
    'address': {'street': '1 High Street', 'town': 'Anytown'}
}";
NSDictionary *jsonData = [jsonString JSONValue];

NSLog(@"Simon lives in %@", [jsonData valueForKeyPath:@"address.town"]);

输出：

Simon lives in Anytown

---

顺便说一下，如果你想要一个有序数据列表（例如你的例子中的players），而不是使用字典（用大括号和键：值数据表示），你可以只使用一个列表（方括号括起一系列值）。所以你的数据变成了：

data: {
    global: {
        players: [
            "John Doe, A school";
            "Joe Doe, Another school";
            "Jane Doe, A school";
            "Jay Doe, Another school";
            "Jimmy Doe, A school";
            "Jeremy Doe, Another school";
            "Johnny Doe, A school";
            "Jeremiah Doe, Another school";
            "Jennifer Doe, A school";
            "Jonathan Doe, Another school";
        ]
        schools: [
            "A school";
            "Another school";
            "The school";
            "The other school";
            "That school";
        ],
        text: "A dynamic text that needs to be displayed to the player.";
    }
};