iOS Question Find within webview

[Kadandale Ganapathy Bhat]

Is there any sample code to search and highlight within webview in b4i,

Thank you

 

[Erel]

Moved to the questions forum.

Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
    WebView1.LoadUrl("https://www.b4x.com/android/forum/threads/find-within-webview.138392/")
    Button1.Enabled = False
    Wait For WebView1_PageFinished (Success As Boolean, Url As String)
    If Success Then
        WebView1.EvaluateJavaScript(File.ReadString(File.DirAssets, "search.js"))
        Button1.Enabled = True
    End If
End Sub


Private Sub Button1_Click
    HighlightOccurences("webview")
End Sub

Private Sub HighlightOccurences(s As String)
    WebView1.EvaluateJavaScript($"uiWebview_HighlightAllOccurencesOfString('${s}')"$)
End Sub

Based on: https://stackoverflow.com/questions/38317747/find-text-in-webview-page-using-swift/38317775#38317775

 

[Kadandale Ganapathy Bhat]

Thank you

In this example the searched word highlighted.
If I want to scroll to highlighted spot programmatically how can get

in android we can scroll using webviewxtener library
example - wvext.scrollTo(WebView1,100,500)
like this how can scroll webview to desired position in b4i (ios)?

 

[Semen Matusovskiy]

It's not a problem to scroll to absolute position. WebView has a scrollView

WebView1.As(NativeObject).GetField ("scrollView")

and you can set contentOffset. But this is incorrect way. Correct way - to use JavaScript scrollIntoView (see uiWebview_ScrollTo function in Erel's sample)

 

[Kadandale Ganapathy Bhat]

It's not a problem to scroll to absolute position. WebView has a scrollView

WebView1.As(NativeObject).GetField ("scrollView")

and you can set contentOffset. But this is incorrect way. Correct way - to use JavaScript scrollIntoView (see uiWebview_ScrollTo function in Erel's sample)

Thank you

please tell me a bit more with example.


and also which is Erel's sample

Thank you

 

[Semen Matusovskiy]

Erel's sample - https://www.b4x.com/android/forum/attachments/project-zip.125424/
I modified it a little (a code is not perfect).

Main part is JS script and do not has a relation to B4i as it is..

 

[Kadandale Ganapathy Bhat]

Thank you, it works perfect.
another thing required, how can the bookmark is made in webpage? and how to scroll to that point where bookmark has been made.?

( in Android WebViewXtender identify the top position of page, but in ios how?)
*** B4A code
Dim lx As Int = wvext.getScrollX(WebView1)
Dim ly As Int = wvext.getScrolly(WebView1)


thank you

 

[Semen Matusovskiy]

As I wrote before, retrieve a scrollview

Dim s As ScrollView = WebView1.As(NativeObject).GetField ("scrollView")

and then you can get/set s.ScrollOffsetX and s.ScrollOffsetY values.

Meanwhile you should do this when a scrollview is still. For example, from our sample:

Wait For (WebView1.EvaluateJavaScript($"uiWebview_ScrollTo('${idx}')"$)) WebView1_JSComplete (Success As Boolean, Result As String)

If you will retrieve scroll offsets immediatelly after this statement, you will receive the coordinates before a scroll.

It's possible to use a delegate and to detect when a scroll is finished, but you need to understand obj-c.

 

[Kadandale Ganapathy Bhat]

very nice
(even I am not aware of java etc. ) I am able to get the result only because for your simple and under stable guidance
Thank you again