Question

导航后，我试图从网站上获取一些信息，但我似乎迫不及待要等到它完全加载。我一直在尝试循环播放，直到（0）的类包含文本为止。有人知道我在做什么错吗？

Sub test()

Dim IE As Object
Set IE = CreateObject("InternetExplorer.Application")
IE.Visible = True

Dim elements2 As IHTMLElementCollection

    IE.Navigate "https://www.facebook.com/marketplace/item/955559644646354/"
        Do While IE.Busy Or IE.readyState <> 4
            DoEvents
        Loop
Dim x
x = 0
Do Until x = 1
Set elements2 = IE.document.getElementsByClassName("_3cgd")

If WorksheetFunction.IsText(elements2(0).innerText) = True Then
    MsgBox ((elements2(0).innerText))
    x = 1
  Else
  Application.Wait Now + #12:00:01 AM#
  End If
Loop

End Sub

Answer 1

尝试这样（未经测试）

Dim t, elements2, txt

t = Timer
txt = ""

Do 
    Set elements2 = IE.document.getElementsByClassName("_3cgd")
    If elements2.length > 0 Then
        txt = elements2(0).innerText
        If Len(txt) > 0 Then Exit Do
    End If

    If (Timer - t) > 10 Then Exit Do 'exit if too long waiting

    Application.Wait Now + TimeSerial(0, 0, 1)
Loop

Answer 2

您可以尝试在下面添加行以等待完全加载网页。

' Wait while IE loading...
'IE ReadyState = 4 signifies the webpage has loaded (the first loop is set to avoid inadvertently skipping over the second loop)
    Do While IE.ReadyState = 4: DoEvents: Loop   'Do While
    Do Until IE.ReadyState = 4: DoEvents: Loop   'Do Until

下面是完整的工作示例：

Sub Automate_IE_Load_Page()
'This will load a webpage in IE
    Dim i As Long
    Dim URL As String
    Dim IE As Object
    Dim objElement As Object
    Dim objCollection As Object

    'Create InternetExplorer Object
    Set IE = CreateObject("InternetExplorer.Application")

    'Set IE.Visible = True to make IE visible, or False for IE to run in the background
    IE.Visible = True

    'Define URL
    URL = "https://www.automateexcel.com/excel/"

    'Navigate to URL
    IE.Navigate URL

    ' Statusbar let's user know website is loading
    Application.StatusBar = URL & " is loading. Please wait..."

    ' Wait while IE loading...
    'IE ReadyState = 4 signifies the webpage has loaded (the first loop is set to avoid inadvertently skipping over the second loop)
    Do While IE.ReadyState = 4: DoEvents: Loop   'Do While
    Do Until IE.ReadyState = 4: DoEvents: Loop   'Do Until

    'Webpage Loaded
    Application.StatusBar = URL & " Loaded"

    'Unload IE
    Set IE = Nothing
    Set objElement = Nothing
    Set objCollection = Nothing

End Sub

此外，您可以根据需要尝试修改此代码示例。

参考：

（1）Automate Internet Explorer (IE) Using VBA

VBA等待网页中的所有内容完全加载

2 个答案: