如何使用 iPhone 的 json 解析对象数组

我在解析 JSON 结果中的对象数组时遇到问题。

[
    {
        "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"
    }
]

我想提取creditCardNumber数组中所有对象的值。

谷歌“JSON 框架”。按照（简单）说明进行安装。

Then go:

//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"]];
}

您将使用 NSMutableArray *creditCards 删除底部，其中充满了包含信用卡号的 NSString 对象。