iPhone：如何创建一个包含多组具有相同键的数据的 NSMutableDictionary？

发布于 2024-11-09 03:02:33 字数 1094 浏览 2 评论 0原文

{

"data": [
    {
        "data": [
            null,
            null,
            30,
            45,
            69,
            70,
            65
        ],
        "title": "title5" 
    },
    {
        "data": [
            null,
            5,
            10,
            15,
            22,
            30 
        ],
        "title": "title4" 
    },
    {
        "data": [
            40,
            55,
        ],
        "title": "title3" 
    },
    {
          "data": [
              null,
            89,
            90,
            85
        ],
        "title": "title2" 
    },
    {
        "data": [
            66,
            77,
            55,
            33,
            50,
            -6,
            -8
        ],
        "title": "title1" 
    } 
],
 "x_labels": [
    6,
    7,
    8,
    9,
    10,
    11,
    12
]
}

我希望我的字典对于它包含的每组值都有相同的键，称为“数据”和“标题”，如上面的代码所示。

但是，当我尝试创建字典并尝试对同一键使用 setValue:forKey: 方法或 addEntriesFromDictionary: 时，它会覆盖每组数据，最后我只得到最后一个我将其放入字典中的数据集。

有什么办法，我可以做到这一点吗？

原文

{

"data": [
    {
        "data": [
            null,
            null,
            30,
            45,
            69,
            70,
            65
        ],
        "title": "title5" 
    },
    {
        "data": [
            null,
            5,
            10,
            15,
            22,
            30 
        ],
        "title": "title4" 
    },
    {
        "data": [
            40,
            55,
        ],
        "title": "title3" 
    },
    {
          "data": [
              null,
            89,
            90,
            85
        ],
        "title": "title2" 
    },
    {
        "data": [
            66,
            77,
            55,
            33,
            50,
            -6,
            -8
        ],
        "title": "title1" 
    } 
],
 "x_labels": [
    6,
    7,
    8,
    9,
    10,
    11,
    12
]
}

I want my dictionary to have same key called "data" and "title" for each set of values it contains as shown by above code.

But when I try to create a dictionary and try using setValue:forKey: method for the same key or addEntriesFromDictionary: it overwrites each set of data and finally I only get the last set of data which I pushed into my dictionary.

Is there a way, I can do this?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

苏大泽ㄣ 2024-11-16 03:02:33

请注意，最低级别字典中的第一个对象是列表或数组。这是关键。

 NSMutableArray * dataArr = [NSMutableArray array];
 NSArray * x_labelArr = [NSArray arrayWithObjects: ...];
 NSMutableDictionary * dict = 
            [NSMutableDictionary dictionaryWithObjectsAndKeys: 
                     arr, @"data", x_labelArr, @"x_labels", nil];

现在您可以将单独的内部字典添加到数组中，每个内部字典都具有相同的键：

NSDictionary * innerDict = 
            [NSDictionary dictionaryWithObjectsAndKeys: 
                  someArrayOfData, @"data", someTitle, @"title"];
NSDictionary * innerDict2 = 
            [NSDictionary dictionaryWithObjectsAndKeys: 
                            someOtherArrayOfData, @"data", 
                                 someOtherTitle, @"title"];
[dataArr addObject:innerDict];
[dataArr addObject:innerDict2];

Notice that the first object in the lowest-level dictionary is a list or array. This is the key.

 NSMutableArray * dataArr = [NSMutableArray array];
 NSArray * x_labelArr = [NSArray arrayWithObjects: ...];
 NSMutableDictionary * dict = 
            [NSMutableDictionary dictionaryWithObjectsAndKeys: 
                     arr, @"data", x_labelArr, @"x_labels", nil];

Now you can add individual inner dictionaries to the array, each of which has the same keys:

NSDictionary * innerDict = 
            [NSDictionary dictionaryWithObjectsAndKeys: 
                  someArrayOfData, @"data", someTitle, @"title"];
NSDictionary * innerDict2 = 
            [NSDictionary dictionaryWithObjectsAndKeys: 
                            someOtherArrayOfData, @"data", 
                                 someOtherTitle, @"title"];
[dataArr addObject:innerDict];
[dataArr addObject:innerDict2];

回复收藏 0 原文