Question

尝试获取下面的json，所有标签都是动态不固定的。

{
Level1: {
row1: {
1: "on",
2: "off",
3: "off",
4: "on",
5: "on",
6: "on",
7: "on",
8: "on",
9: "on",
10: "on",
11: "on",
12: "on",
13: "on",
14: "on",
15: "on",
16: "on",
17: "on",
18: "on",
19: "on",
20: "on",
attr: {
total: "20",
type: "Gold"
}
},
row10: {
1: "on",
2: "on",
3: "on",
4: "on",
5: "on",
6: "on",
7: "on",
8: "on",
9: "on",
10: "on",
11: "on",
12: "on",
13: "on",
14: "on",
15: "on",
16: "on",
17: "on",
18: "on",
19: "on",
20: "on",
attr: {
total: "20",
type: "Bronze"
}
}
},
Level3: {
row1: {
1: "on",
2: "on",
3: "on",
4: "on",
5: "on",
6: "on",
7: "on",
8: "on",
9: "on",
10: "on",
11: "on",
12: "on",
13: "on",
14: "on",
15: "on",
16: "on",
17: "on",
18: "on",
19: "on",
20: "on",
attr: {
total: "20",
type: "Gold"
}
},
row5: {
1: "on",
2: "on",
3: "on",
4: "on",
5: "on",
6: "on",
7: "on",
8: "on",
9: "on",
10: "on",
11: "on",
12: "on",
13: "on",
14: "on",
15: "on",
16: "on",
17: "on",
18: "on",
19: "on",
20: "on",
attr: {
total: "20",
type: "Bronze"
}
}
}
}

这是我到目前为止所尝试的。

NSString *level;
for(NSString *key in [[self.mGetDataDict allKeys]sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)])
{
    NSLog(@"Accessing .... %@",key);
    level = key; 

    for(NSString *rowKey in self.mGetDataDict[key])
    {
        [arrayLevels addObject:level];

        NSLog(@"%@",rowKey);
        [arrRows addObject:rowKey];
        for(NSString *valueKey in self.mGetDataDict[key][rowKey])
        {
            // NSLog(@"%@ -> %@",valueKey,self.mGetDataDict[key][rowKey][valueKey]);
            if([valueKey isEqualToString:@"attr"])
            {
                dictRow = self.mGetDataDict[key][rowKey][valueKey];
            }
            else{
                 //dictRow = self.mGetDataDict[key][rowKey][valueKey];
                [arrSeatsStatus addObject:self.mGetDataDict[key][rowKey][valueKey]];
            }
        }
        NSLog(@"--------ROW OVER------------%@\n", dictRow);
        [arrSeats addObject:[dictRow valueForKey:@"total"]];
         NSString *strTypes = [NSString stringWithFormat:@"%@ %@", [arrayLevels objectAtIndex:i], [dictRow valueForKey:@"type"]];
        [arrTypes addObject:strTypes];

            NSMutableArray *array = [NSMutableArray array];
            array = [arrSeatsStatus copy];
            [seatsDict setObject:array forKey:[NSString stringWithFormat:@"%d",i]];
            i++;
            [arrSeatsStatus removeAllObjects];

        NSLog(@"--------seats dict------------%@\n", seatsDict);

        NSLog(@"--------seats in row------------%@\n", arrSeats);
       // NSLog(@"--------seats status------------%@\n", arrStatus);
        NSString *row = [NSString stringWithFormat:@"%@",[arrSeats objectAtIndex:0]];
        rows = [row integerValue];
    }
    NSString *num = [arrSeats valueForKeyPath: @"@sum.self"];
    tot = [num integerValue];
    [arrTot addObject:[NSString stringWithFormat:@"%d",tot]];
    tot = 0;
    //[arrSeats removeAllObjects];
    NSLog(@"--------ROW OVER tot seats------------%@\n", arrTot);
    NSLog(@"--------------------seats:%@\n", num);
    NSLog(@"--------------------\n");
}

问题在于，当获取数据时，它不是来自JSON的顺序。例如，当上面的代码运行时，它首先获取level2然后row2然后按某种顺序进一步但不按顺序如上所示。希望我说清楚。请指导以上。提前谢谢。

Answer 1

例如，替换

for(NSString *rowKey in self.mGetDataDict[key])

与

NSDictionary *rowDict = self.mGetDataDict[key];
for (NSString *rowKey in rowDict)

（虽然试着想出“rowDict”更具描述性的名称）

是的，它是更多的字符，但在后面的行中，您可以引用rowDict[something]，也可能稍后引用valueDict[something]而不是长索引链。两者都更有效，更容易保持直线。

Answer 2

我完全赞同 Hot Licks ，关注你的代码和你的问题的想法真的很复杂:)据我所知，你问，为什么你没有排序你的密钥他们在json的方式。

您用来获取它们的工具是将您的json转换为NSDictionary，而NSDictionary并不保证密钥以任何方式排序或在放入时保留。因此，您正在使用比较器 - @selector（caseInsensitiveCompare :) 以某种方式对键进行排序。

所以答案是：如果你想以复杂的方式对键进行排序（为了“保留在json中的顺序”不能单独完成，你必须在从NSDictionary检索键时这样做），你必须实现你自己的比较器。这不是 caseInsensitiveCompare：，而是必须使用自定义选择器。您可以找到in great amount around stackoverflow

的示例

希望这有帮助。

与来自JSON的数据相比，数据提取顺序相反

2 个答案: