我们知道数组的长度是固定的，定义了以后不能随意的增加其长度，但是我们可以用类来实现表面上的扩容（即增加数组的存储空间）
1.首先我们添加一个类模块，取名为”myarr”
并且在里面添加一些方法（比如扩容，查看数组值等）
具体代码如下：
Option Explicit
Private arr() As String '数组 ，用来存储数据
Private ilen As Integer '数组长度
Private icount As Integer '实际数组长度
Private Const per As Integer = 4 '每次扩容的个数（可变）
'容量，只读属性
Property Get length() As Integer
length = ilen
End Property
'实际数据的个数，只读属性
Property Get count() As Integer
Dim i As Integer
For i = 1 To UBound(arr)
If Len(arr(i)) = 0 Then
icount = i - 1
count = icount
Exit Property
End If
Next i
icount = length
count = icount
End Property
'添加数据
Sub add(item As String)
If count = length Then '实际个数达到了容量，应该扩容
Call expandarr
End If
arr(count + 1) = item
End Sub
'获取全部数据
Function getallvalue() As String()
Dim ar() As String, i As Integer
ReDim ar(1 To count) As String
For i = 1 To count
ar(i) = arr(1)
Next i
getallvalue = ar
End Function
'获取数据
Function getvalue(index As Integer) As String
If index > length Or index < 1 Then
getvalue = "小标越界"
Else
getvalue = arr(index)
End If
End Function
'扩容(步进式扩容
Sub expandarr()
ilen = ilen + per
ReDim Preserve arr(1 To ilen) As String
End Sub
Private Sub Class_Initialize()
Call expandarr
End Sub
2.我们来测试一下
Option Explicit
Sub 测试()
Dim myar As myarr
Set myar = New myarr
Debug.Print myar.length & "....." & myar.count
myar.add "坦克"
myar.add "克"
myar.add "坦克lo"
myar.add "坦"
myar.add "坦克合伙人和健康"
myar.add "坦克是哦"
Debug.Print myar.length & "....." & myar.count
End Sub
效果如下图所示
我们可以看出，当数组的容量不够时，数组会自动扩容（表面上增加四个存储空间）