NSMutableArray of dictionaries from JSON feed insert new obj

Question

我从JSON提要中接收一个字典数组，并将其分配给一个名为jsonArray的NSMutableArray，即:

jsonArray = [deserializedData objectForKey:@"reports"];

提要看起来像这样:

reports =     (
            {
        address = "The street";
        email = "[e-mail]";
        "eng_id" = 1;
        "eng_name" = "Alex McPherson";
        "eng_thumb" = "http://someurl/image/1.png";
        form = Test;
        id = 59;
        lat = "51.1438330";
        live = 1;
        lng = "0.8693330";
        location = "17 Victoria Crescent, Ashford, TN23 7HL";
        name = "Alex McPherson";
        phone = 01233000000;
        rid = "A5C963-C95B-C3D639";
        title = "#A5C963-C95B-C3D639, Litter";
        tm = "2013-04-28 20:44:20";
        type = 5;
        "type-text" = "Litter";
    },
            {
        address = "The street";
        email = "[e-mail]";
        "eng_id" = 2;
        "eng_name" = "Rob Burt";
        "eng_thumb" = "http://someurl/image/1.png";
        form = Test;
        id = 122;
        lat = "51.1415000";
        live = 1;
        lng = "0.8715000";
        location = "38 Beaver Road, Ashford, TN23 7RP";
        name = Alex;
        phone = 01233000000;
        rid = "5A5C96-9072-6BAFA9";
        title = "#5A5C96-9072-6BAFA9, Litter";
        tm = "2013-04-28 20:35:56";
        type = 8;
        "type-text" = "Litter";
    };

我想要做的是插入一个新的值key让我们说到这个jsonArray: distance = "0.16km"但是我的大脑只是不工作今晚....

所以新的jsonArray应该是这样的，加上上面提到的键值:

reports =     (
            {
        address = "The street";
        email = "[e-mail]";
        "eng_id" = 1;
        "eng_name" = "Alex McPherson";
        "eng_thumb" = "http://someurl/image/1.png";
        form = Test;
        id = 59;
        lat = "51.1438330";
        live = 1;
        lng = "0.8693330";
        distance = "0.16km";
        location = "17 Victoria Crescent, Ashford, TN23 7HL";
        name = "Alex McPherson";
        phone = 01233000000;
        rid = "A5C963-C95B-C3D639";
        title = "#A5C963-C95B-C3D639, Litter";
        tm = "2013-04-28 20:44:20";
        type = 5;
        "type-text" = "Litter";
    },
            {
        address = "The street";
        email = "[e-mail]";
        "eng_id" = 2;
        "eng_name" = "Rob Burt";
        "eng_thumb" = "http://someurl/image/1.png";
        form = Test;
        id = 122;
        lat = "51.1415000";
        live = 1;
        lng = "0.8715000";
        distance = "2.13km";
        location = "38 Beaver Road, Ashford, TN23 7RP";
        name = Alex;
        phone = 01233000000;
        rid = "5A5C96-9072-6BAFA9";
        title = "#5A5C96-9072-6BAFA9, Litter";
        tm = "2013-04-28 20:35:56";
        type = 8;
        "type-text" = "Litter";
    };

基本上我有一个计算，从提要中获取长度和长度，并计算出poi距离我当前位置的距离，然后我通过使用基于我想在上面插入的距离键的排序描述符对数组进行排序。我的代码只是插入到现有的nsmutablearray上面

Answer 1

将反序列化JSON数组读取为NSArray(而不是NSMutableArray)。然后使用如下语句创建该数组的可变副本:

NSMutableArray *mutableArray = [originalArray mutableCopy];