以下代码在标记行的办公室的两台机器上以“VB.exe 中未处理的异常错误”终止 VB6 (sp6)。
''# Form1.frm
Option Explicit
Private ArrayHolder As Class2
Private Sub Command1_Click()
Set ArrayHolder = New Class2
Dim arr(3) As Long
arr(0) = 1
arr(1) = 2
arr(2) = 3
ArrayHolder.Add arr
End Sub
''# -----------------------------------------------------------
''# Class1.cls
Option Explicit
Private m_myArray() As Long
Public Property Get myArray() As Long()
myArray = m_myArray
End Property
Friend Property Let myArray(ByRef anArray() As Long)
m_myArray = anArray
End Property
''# -----------------------------------------------------------
''# Class2.cls
Option Explicit
Friend Function Add(newArray() As Long) As Class1
Dim oClass As Class1
Set oClass = New Class1
oClass.myArray = newArray <- This kills VB6 dead
MsgBox "passed"
End Function
从我在各个网站上可以看出,我正确地传递了一个数组,但我实际上做得正确吗?为什么它会导致 VB6 如此可怕地死亡?
我没有答案,这当然是一个奇怪的问题,但为什么不添加一个方法并继续前进呢?
'Passed the test
Public Sub LetMyArray(anArray() As Long)
m_myArray = anArray
End Sub
'oClass.MyArray = newArray ' <- This kills VB6 dead
oClass.LetMyArray newArray ' <- This works
这是IDE中的一个bug(编译没问题),MS从未修复过。我正在使用像这样的临时数组的解决方法:
Friend Function Add(newArray() As Long) As Class1
Dim oClass As Class1
Dim tempArray() As Long
Set oClass = New Class1
tempArray = newArray
oClass.myArray = tempArray <- Should work now
MsgBox "passed"
End Function
仅供参考,当您不小心将鼠标悬停在参数或数组属性上时,字节数组(长数组是安全的)会变得更糟。最好让鼠标远离代码:-))
Private m_myArray As Variant
Public Property Get myArray() As Variant
myArray = m_myArray
End Property
Friend Property Let myArray(anArray As Variant)
m_myArray = anArray
End Property
修复了它,但我仍然很好奇原因。
它在本地堆栈上创建 3 个变量(12 字节)。没有数组头,所以这就是为什么当它访问一个数组头时它会崩溃(因为它不在那里) 像这样从堆中分配数组应该没问题;
dim arr() 只要 重做 arr(3)