Question

我正在将字典作为JSON响应

Lease =     {
    "KINDERSLEY KERROBERT" =
    (
     {
         "lease_code" = 37;
     },
     {
         "lease_code" = 38;
     }
     );
    LLOYDMINSTER =
    (
     {
         "lease_code" = 68;
     },
     {
         "lease_code" = 69;
     }
     );
    "SOUTHEASTERN SASKATCHEWAN" =
    (
     {
         "lease_code" = 1;
     },
     {
         "lease_code" = 2;
     }
     );
    "SWIFT CURRENT" =
    (
     {
         "lease_code" = 32;
     },
     {
         "lease_code" = 33;
     }
     );
    };

我想按如下方式对其进行排序：

 Lease =     {
"SOUTHEASTERN SASKATCHEWAN" =
(
 {
     "lease_code" = 1;
 },
 {
     "lease_code" = 2;
 }
 );
"SWIFT CURRENT" =
(
 {
     "lease_code" = 32;
 },
 {
     "lease_code" = 33;
 }
 );
"KINDERSLEY KERROBERT" =
(
 {
     "lease_code" = 37;
 },
 {
     "lease_code" = 38;
 }
 );
LLOYDMINSTER =
(
 {
     "lease_code" = 68;
 },
 {
     "lease_code" = 69;
 }
 );
};

我在下面编写代码来对字典进行排序：

- (NSArray *)sortKeysByIntValue:(NSDictionary *)dictionary {

    NSArray *sortedKeys = [dictionary keysSortedByValueUsingComparator:^NSComparisonResult(NSArray *obj1, NSArray *obj2) {
        NSString* key1 = [[obj1 objectAtIndex:0] objectForKey:@"lease_code"];
        NSString* key2 = [[obj2 objectAtIndex:0] objectForKey:@"lease_code"];
        return [key1 compare:key2];
    }];
    return sortedKeys;
}

它为我提供了我想要的sortKeys，但在使用以下代码重建NSMutableDictionary之后：

NSArray *sortedKeys = [self sortKeysByIntValue:dictionary];
NSMutableDictionary *sortedDictionary = [[NSMutableDictionary alloc] init];

for (NSString *key in sortedKeys) {
    [sortedDictionary setObject:dictionary[key] forKey:key];
}

它再次未按照回复显示。

请帮帮我

Answer 1

词典总是未分类的。它们用作查找数据的键值存储。您应该将数据的顺序与字典分开。您需要已有的词典和键的排序数组。

@property NSDictionary *dataDict;
@property NSArray *sortedKeys;

self.sortedKeys = [self sortKeysByIntValue:self.dataDict];

在UITableViewDataSource方法中，首先使用索引查询数组，获取密钥，然后从字典中检索数据。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSInteger row = [indexPath row];
    NSString *key = [self.sortedkeys objectAtIndex:row];
    NSObject *dataObject = [self.dataDict valueForKey:key];

Answer 2

NSArray *sortedKeys = [self sortKeysByIntValue:dictionary];
NSMutableArray* values = [NSMutableArray array];

for (NSString* key in sortedKeys)
{
   [values addObject:dictionary[key]];
}

现在您已经对键和值进行了排序。这正是您所需要的

如何在ios中使用动态键对NSMutableDictionary进行排序？

2 个答案: