如何使用json为iphone解析对象数组 [英] how to parse array of objects using json for iphone

问题描述

我在解析JSON结果中的对象数组时遇到问题。

I have a problem parsing the array of objects from the JSON result.

[
    {
        "first_name":"vijay",
        "last_name":"last",
        "creditCardNumber":"178978977779787979",
        "month":"02","year":"2012",
        "address":"Addres2"
    }

    { 
        "first_name":"vijay",
        "last_name":"last",
        "creditCardNumber":"178978977779787979",
        "month":"02","year":"2012",
        "address":"Addres2"
    }

    {
        "first_name":"vijay",
        "last_name":"last",
        "creditCardNumber":"178978977779787979",
        "month":"02","year":"2012",
        "address":"Addres2"
    }
]

我希望从数组中的所有对象中提取 creditCardNumber 值。

I wish to extract creditCardNumber value from all objects in the array.

推荐答案

GoogleJSON框架。按照（简单）说明进行安装。

Google "JSON Framework". Follow the (easy) instructions to install it.

然后去：

//let's say there's NSString *jsonString.

NSArray *userData = [jsonString JSONValue];

NSMutableArray *creditCards = [NSMutableArray array];
for (NSDictionary *user in userData) {
    [creditCards addObject:[user objectForKey:@"creditCardNumber"]];
}

你将使用NSMutableArray * creditCards充满NSString而放弃底部包含信用卡号的对象。

You'll drop out the bottom of that with NSMutableArray *creditCards full of NSString objects containing the credit card numbers.

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