Question

我正在尝试在发送产品ID列表后对从Apple Server收到的SKProduct数组进行排序。

我想通过使用以下内容进行排序：

NSSortDescriptor *lowestPriceToHighest = [NSSortDescriptor sortDescriptorWithKey:@"self.price" ascending:YES];
NSArray *sortedProducts = [products sortedArrayUsingDescriptors:[NSArray arrayWithObject:lowestPriceToHighest]];

但是我收到了错误消息：Unable to access variable "lowestPriceToHighest" 我的排序描述符是否被错误定义？

Answer 1

尝试删除“自我”

NSSortDescriptor *lowestPriceToHighest = [NSSortDescriptor sortDescriptorWithKey:@"price" ascending:YES];
    NSArray *sortedProducts = [products sortedArrayUsingDescriptors:[NSArray arrayWithObject:lowestPriceToHighest]];

Answer 2

假设你有var products: [SKProduct]，你可以这样做：

products.sortInPlace {
    return Float($0.price) < Float($1.price)
}

Answer 3

斯威夫特4：

products.sort(by: { (p0, p1) -> Bool in
    return p0.price.floatValue < p1.price.floatValue
})

Answer 4

尝试：

NSArray *products = [response.products sortedArrayUsingComparator:^(id a, id b) {
        NSDecimalNumber *first = [(SKProduct*)a price];
        NSDecimalNumber *second = [(SKProduct*)b price];
        return [first compare:second];
    }];

从这个答案：

how to sort products by price In App Purchases?

Answer 5

NSSortDescriptor  *sort = [[NSSortDescriptor alloc] initWithKey:@"_strPrice"
                                                 ascending:sortFlag selector:@selector(localizedStandardCompare:)] ;

尝试使用此选择器

如何按价格值对SKProduct数组进行排序

5 个答案: