用vba在工作表中以指定的sheet中的B列第二行的单元格中的日期开始依次往下为索引，依次生成以单元格中的日期命名的sheet，并在每一个生成的sheet中的A列到H列第一行的单元格中输入标题

好的，以下是VBA代码实现：

Sub CreateSheets()
    Dim startDate As Date
    Dim endDate As Date
    Dim currentDate As Date
    Dim currentSheetName As String
    Dim currentSheet As Worksheet
    
    startDate = Sheets("指定的sheet名称").Range("B2").Value
    endDate = DateAdd("d", 30, startDate) '生成30天的表格，可以根据需求修改
    
    For currentDate = startDate To endDate
        currentSheetName = Format(currentDate, "yyyymmdd") '以日期命名sheet名称
        If Not SheetExists(currentSheetName) Then '判断sheet是否已存在
            Worksheets.Add(After:=Worksheets(Worksheets.Count)).Name = currentSheetName '生成新sheet
            Set currentSheet = Worksheets(currentSheetName)
            '在新sheet中输入标题
            currentSheet.Range("A1").Value = "标题1"
            currentSheet.Range("B1").Value = "标题2"
            currentSheet.Range("C1").Value = "标题3"
            currentSheet.Range("D1").Value = "标题4"
            currentSheet.Range("E1").Value = "标题5"
            currentSheet.Range("F1").Value = "标题6"
            currentSheet.Range("G1").Value = "标题7"
            currentSheet.Range("H1").Value = "标题8"
        End If
    Next currentDate
End Sub

Function SheetExists(sheetName As String) As Boolean '判断sheet是否存在
    Dim sheet As Worksheet
    
    SheetExists = False
    For Each sheet In Worksheets
        If sheet.Name = sheetName Then
            SheetExists = True
            Exit Function
        End If
    Next sheet
End Function

使用时需将 `"指定的sheet名称"` 修改为实际的sheet名称。同时，可以根据需求修改生成表格的天数和标题名称。