ios - 对嵌套的 NSMutableArray 进行排序

Question

我要排序的 NSMutableArray 如下所示:

 (
        {
            "title" = "Bags";
            "price" = "$200";
        },
        {
            "title" = "Watches";
            "price" = "$40";
        },
        {
            "title" = "Earrings";
            "price" = "$1000";
        }
 )

它是一个 NSMutableArray，它包含一组 NSMutableArray。我想先按 price 排序，然后按 title 排序。

NSSortDescriptor *sortByPrices = [[NSSortDescriptor alloc] initWithKey:@"price" ascending:YES];
NSSortDescriptor *sortByTitle = [[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES];

[arrayProduct sortedArrayUsingDescriptors:[NSArray arrayWithObjects:sortByPrices,sortByTitle,nil]];

但是，这似乎不起作用，如何对嵌套的 NSMutableArray 进行排序？

Answer 1

尝试

    NSMutableArray  *arrayProducts = [@[@{@"price":@"$200",@"title":@"Bags"},@{@"price":@"$40",@"title":@"Watches"},@{@"price":@"$1000",@"title":@"Earrings"}] mutableCopy];

    NSSortDescriptor *priceDescriptor = [NSSortDescriptor sortDescriptorWithKey:@""
                                                                 ascending:YES
                                                                comparator:^NSComparisonResult(NSDictionary  *dict1, NSDictionary *dict2) {
                                                                    return [dict1[@"price"] compare:dict2[@"price"] options:NSNumericSearch];
    }];

    NSSortDescriptor *titleDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"title" ascending:YES];



    [arrayProducts sortUsingDescriptors:@[priceDescriptor,titleDescriptor]];

    NSLog(@"SortedArray : %@",arrayProducts);