Question

我正在尝试通过“dateRanges”对这个数组进行排序，这是一个NSDate对象。

- [0]
  - name : "BREAKFAST"
  - dateRanges
    - [0]
      - [0] : 2015-06-18 08:00:00 +0000
    - [1]
      - [0] : 2015-06-19 19:00:00 +0000
  - hours
    - [0] : 2
    - [1] : 2
- [1]
  - name : "LUNCH"
  - dateRanges
    - [0]
      - [0] : 2015-06-16 08:00:00 +0000
  - hours
    - [0] : 8
- [2]
  - name : "DINNER"
  - dateRanges
    - [0]
      - [0] : 2015-06-17 06:30:00 +0000
    - [1]
      - [0] : 2015-06-30 16:00:00 +0000
    - [2]
      - [0] : 2015-06-12 17:00:00 +0000
    - [3]
      - [0] : 2015-06-29 09:30:00 +0000
  - hours
    - [0] : 1
    - [1] : 2
    - [2] : 3
    - [3] : 3

我的工作是致电：

extension NSDate: Comparable { }

public func <(lhs: NSDate, rhs: NSDate) -> Bool {
   return lhs.compare(rhs) == .OrderedAscending
}

result.sortInPlace({ $0.dateRanges[0][0].compare($1.dateRanges[0][0]) == NSComparisonResult.OrderedAscending })

但输出结果如下：

- [0]
  - name : "LUNCH"
  - dateRanges
    - [0]
      - [0] : 2015-06-16 08:00:00 +0000
  - hours
    - [0] : 8
- [1]
  - name : "DINNER"
  - dateRanges
    - [0]
      - [0] : 2015-06-17 06:30:00 +0000
    - [1]
      - [0] : 2015-06-30 16:00:00 +0000
    - [2]
      - [0] : 2015-06-12 17:00:00 +0000
    - [3]
      - [0] : 2015-06-29 09:30:00 +0000
  - hours
    - [0] : 1
    - [1] : 2
    - [2] : 3
    - [3] : 3
- [2]
  - name : "BREAKFAST"
  - dateRanges
    - [0]
      - [0] : 2015-06-18 08:00:00 +0000
    - [1]
      - [0] : 2015-06-19 19:00:00 +0000
  - hours
    - [0] : 2
    - [1] : 2

正如你所看到的，它只按dateRanges [0] [0]索引排序，（显然是因为我在sortInPlace方法中问它），但我想知道如何通过dateRanges对这个数组进行排序的索引。预期结果应为：

- [0]
  - name : "LUNCH"
  - dateRanges
    - [0]
      - [0] : 2015-06-16 08:00:00 +0000
  - hours
    - [0] : 8
- [1]
  - name : "DINNER"
  - dateRanges
    - [0]
      - [0] : 2015-06-12 17:00:00 +0000
    - [1]
      - [0] : 2015-06-17 06:30:00 +0000
    - [2]
      - [0] : 2015-06-29 09:30:00 +0000
    - [3]
      - [0] : 2015-06-30 16:00:00 +0000
  - hours
    - [0] : 1
    - [1] : 2
    - [2] : 3
    - [3] : 3
- [2]
  - name : "BREAKFAST"
  - dateRanges
    - [0]
      - [0] : 2015-06-18 08:00:00 +0000
    - [1]
      - [0] : 2015-06-19 19:00:00 +0000
  - hours
    - [0] : 2
    - [1] : 2

Answer 1

当我仔细观察你想要的结果时，似乎它没有以任何方式排序，你仍然按0索引排序。所以如果这真的是你的目标，那么你需要做的就是：

MyArray.sortByZeroIndices() //here you use your code
for item in MyArray {
  item.dateRanges.sort(<) // sort every internal array
}

如何在Swift中的自定义数组中按NSDate排序

1 个答案: