在VBA中使用比较器对对象集合进行排序

' 创建一个类，实现IComparer接口
Class Comparer Implements IComparer
    Private Sub IComparer_Compare(ByVal x As Variant, ByVal y As Variant)
        ' 将x和y转换为对应的对象类型
        Dim obj1 As ObjectType
        Dim obj2 As ObjectType
        Set obj1 = x
        Set obj2 = y
        
        ' 比较obj1和obj2的大小关系，并返回结果
        If obj1 < obj2 Then
            IComparer_Compare = -1
        ElseIf obj1 > obj2 Then
            IComparer_Compare = 1
        Else
            IComparer_Compare = 0
        End If
    End Sub
    
    ' 定义一个公共方法，用于对对象集合进行排序
    Public Sub SortCollection(ByVal collection As Collection)
        ' 将collection转换为数组
        Dim arr() As Variant
        ReDim arr(collection.Count)
        Dim i As Integer
        For i = 1 To collection.Count
            Set arr(i) = collection(i)
        Next i
        
        ' 调用VBA的排序函数对数组进行排序
        BubbleSort arr, Me
        
        ' 将排序后的数组重新放回集合
        collection.Clear
        For i = 1 To UBound(arr)
            collection.Add arr(i)
        Next i
    End Sub
End Class

' 创建一个对象集合
Dim collection As New Collection

' 添加一些对象到集合中
Dim obj1 As New ObjectType
' ...
collection.Add obj1
' ...

' 创建一个Comparer对象
Dim comparer As New Comparer

' 调用SortCollection方法对集合进行排序
comparer.SortCollection collection