如何根据值重新排列 NSDictionary？

Question

我需要列出所有字典值。喜欢从最高分到最低分。我该如何处理？

我需要在 table 视图中列出所有标记以及相应的名称和详细信息。

2015-04-06 14:48:53.381 camelProject[3310:597950] valueforkey title = (
    {
    CamelID = 237;
    Color = bg;
    Comments = "Fhjfnfnfjfihgjfmsndidm,almcmcuirowmvn vmmc Jdmdmcm";
    CompID = 235;
    DateOfBirth = "/Date(1424725200000)/";
    Description = "rtrtttrtrehndskvn;lkdf;lm;mgemln;lm';' jknt;l";
    FromUserID = 564987631;
    FromUsername = 564987631;
    ID = 4;
    IndvMarks = "5;5;3;4;2;2;2;2;5;9";
    Marks = 39;
    Name = name3sv;
    OutOF = 100;
    ProfilePhoto = "2D0B36F3-71B3-4B5F-A375-7AD4D0AFF1AF.jpg\n";
    TOname = hasnam;
    ToUserName = 564987631;
    Types = dsfv;
    UserID = 564987631;
    fromname = hasnam;
},
    {
    CamelID = 237;
    Color = bg;
    Comments = "";
    CompID = 235;
    DateOfBirth = "/Date(1424725200000)/";
    Description = "rtrtttrtrehndskvn;lkdf;lm;mgemln;lm';' jknt;l";
    FromUserID = 564987631;
    FromUsername = 564987631;
    ID = 5;
    IndvMarks = "5;4;5;7;6;0;6;5;4;6";
    Marks = 48;
    Name = name3sv;
    OutOF = 100;
    ProfilePhoto = "2D0B36F3-71B3-4B5F-A375-7AD4D0AFF1AF.jpg\n";
    TOname = hasnam;
    ToUserName = 564987631;
    Types = dsfv;
    UserID = 564987631;
    fromname = hasnam;
},
    {
    CamelID = 237;
    Color = bg;
    Comments = Gucjhkhvnkvnvnvknkjbkvjhvvkb;
    CompID = 235;
    DateOfBirth = "/Date(1424725200000)/";
    Description = "rtrtttrtrehndskvn;lkdf;lm;mgemln;lm';' jknt;l";
    FromUserID = 564987631;
    FromUsername = 564987631;
    ID = 6;
    IndvMarks = "3;4;4;3;5;4;4;3;3;5";
    Marks = 38;
    Name = name3sv;
    OutOF = 100;
    ProfilePhoto = "2D0B36F3-71B3-4B5F-A375-7AD4D0AFF1AF.jpg\n";
    TOname = hasnam;
    ToUserName = 564987631;
    Types = dsfv;
    UserID = 564987631;
    fromname = hasnam;
},
    {
    CamelID = 236;
    Color = wejr;
    Comments = "Jfj ki idhvjfn isms isn't if jfj Jen hik";
    CompID = 235;
    DateOfBirth = "/Date(1427058000000)/";
    Description = jwenrfernkgr;
    FromUserID = 564987631;
    FromUsername = 564987631;
    ID = 21;
    IndvMarks = "8;6;10;10;10;7;5;8;9;5";
    Marks = 78;
    Name = name;
    OutOF = 100;
    ProfilePhoto = "E7735AF4-8EAB-41E7-A3F2-3280DBED0389.jpg\n";
    TOname = lukman;
    ToUserName = 564987634;
    Types = wenjewfn;
    UserID = 564987634;
    fromname = hasnam;
}
)

Answer 1

示例：

NSArray *originalArray = @[
                               @{@"page_no": @"27"},
                               @{@"page_no": @"1"},
                               @{@"page_no": @"12"},
                               @{@"page_no": @"23"},
                               @{@"page_no": @"3"},
                               @{@"page_no": @"2"},
                               @{@"page_no": @"17"},
                               ];

    NSSortDescriptor *alphaNumSD = [NSSortDescriptor sortDescriptorWithKey:@"page_no"
                                                                 ascending:YES
                                                                comparator:^(NSString *string1, NSString *string2)
    {
        return [string1 compare:string2 options:NSNumericSearch];
    }];


    NSArray *sortedArray = [originalArray sortedArrayUsingDescriptors:@[alphaNumSD]];
    NSLog(@"%@", sortedArray);

输出：

(
        {
        "page_no" = 1;
    },
        {
        "page_no" = 2;
    },
        {
        "page_no" = 3;
    },
        {
        "page_no" = 12;
    },
        {
        "page_no" = 17;
    },
        {
        "page_no" = 23;
    },
        {
        "page_no" = 27;
    }
)

它确实按预期工作。

Answer 2

将值放入数组并使用排序描述符对它们进行排序。

NSArray *array = [dictioanry objectForKey:@"title"];

NSSortDescriptor* marksDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"Marks"
                                                                      ascending:YES];
NSArray* sortedObjects = [array sortedArrayUsingDescriptors:[NSArray arrayWithObjects:marksDescriptor, nil]];

//YOu can put this object back into NSDictionary if you want it for later

我想你的字典应该是这样的。

所以上面的代码应该可以对值进行排序。这是我进行测试时使用的示例代码。

注意：将 JSON 字符串保存在 test.json 中并将其添加到项目中。 or download the file from here 并将其添加到您的项目中

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"json"];
    NSData *data = [NSData dataWithContentsOfFile:filePath];


    NSDictionary *jsonDictionary=[NSJSONSerialization
                              JSONObjectWithData:data
                              options:NSJSONReadingMutableLeaves
                              error:nil];

    NSLog(@"%@",jsonDictionary);

    NSArray *array = [jsonDictionary objectForKey:@"title"];

    NSSortDescriptor* marksDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"Marks"
                                                                      ascending:YES];
    NSArray* sortedObjects = [array sortedArrayUsingDescriptors:[NSArray arrayWithObjects:marksDescriptor, nil]];


    NSLog(@"%@",sortedObjects);

如何根据值重新排列 NSDictionary？

How to rearrange NSDictionary according to the values?

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