iOS Question googlemaps appears only small top of screen

JohnnyHamburg · Jan 19, 2018

Hello,
i have a problem with googlemaps. On first start it only shows in top part of the screen like you can see from my screenshot.
When I go back to startpage and again to mappage, then it works fine.
I tryed a lot, but it seems to deal with the new Version B4i or Xcode, because it worked before.

Andris · Jan 19, 2018

JohnnyHamburg said:
Hello,
i have a problem with googlemaps. On first start it only shows in top part of the screen like you can see from my screenshot.
When I go back to startpage and again to mappage, then it works fine.
I tryed a lot, but it seems to deal with the new Version B4i or Xcode, because it worked before.

View attachment 63901

Do you have some lines of code that look something like this?

B4X:

    gmap.Initialize("gmap", API_Map)
    'add gmap into mfMap panel
    mfMap.AddView(gmap,0,0,mfMap.Width,mfMap.Height)

mfMap iwould be a panel in your layout that is placed at the size you want the map to be. At least this is the way I do it, and it works fine.

JohnnyHamburg · Jan 19, 2018

My code is this to add the map:

B4X:

Public Sub Show
    karte.Initialize("karte")
    karte.RootPanel.LoadLayout("tposmap")
    Main.NavControl.ShowPage(karte)
     AddMap
    Dim no As NativeObject
    Log("Version: " & no.Initialize("GMSServices").RunMethod("SDKVersion", Null).AsString)
End Sub

Private Sub AddMap
    gmap.Initialize("gmap", ApiKey)
    karte.RootPanel.AddView(gmap, 0, 0, 100%X, 100%y)
    gmap.MapType = gmap.MAP_TYPE_TERRAIN
    gmap.GetUiSettings.CompassEnabled = True
    gmap.GetUiSettings.MyLocationButtonEnabled = False
    gmap.MyLocationEnabled = True
'    gmap.GetUiSettings.ScrollGesturesEnabled = True
'    gmap.GetUiSettings.ZoomGesturesEnabled = True
    
    Pnlmember.Visible = False
    Btnmapchange.BringToFront
    Btnmembers.BringToFront
    BtnSchriftgros.BringToFront
    BtnSchriftklein.BringToFront
    Btnmyloc.BringToFront
    BtnZoommin.BringToFront
    BtnZoomplus.BringToFront

End Sub

JohnnyHamburg · Jan 19, 2018

I tryed already to use a panel.

Andris · Jan 19, 2018

I've found that using the 100%x and 100%y notation has led to problems in my code, when I use it as a parameter of a subroutine. There are some differences with B4A. Try this:

B4X:

Dim mwid,mhgt as int
mwid=100%x
mhgt=100%y
karte.RootPanel.AddView(gmap, 0, 0, mwid, mhgt)

See if that makes a difference.

JohnnyHamburg · Jan 19, 2018

Thank You, Andris. Your Code didn`t work either. But it gave me an idea. Now it works. I used the panel again and instead of 100%x, 100%y I put 320, 568.

B4X:

gmap.Initialize("gmap", ApiKey)
    PanelGMAP.AddView(gmap, 0, 0, 320, 568)

Erel · Jan 21, 2018

Your solution is incorrect.

See the example project: https://www.b4x.com/android/forum/threads/googlemaps-tutorial.47019/

You should resize the map when the page is resized:

B4X:

Private Sub Page1_Resize(Width As Int, Height As Int)
   If gmap.IsInitialized Then gmap.SetLayoutAnimated(0, 1, 0, 0, Width, Height)
End Sub

JohnnyHamburg · Jan 21, 2018

Erel said:
Your solution is incorrect.

See the example project: https://www.b4x.com/android/forum/threads/googlemaps-tutorial.47019/

You should resize the map when the page is resized:

B4X:

Private Sub Page1_Resize(Width As Int, Height As Int) If gmap.IsInitialized Then gmap.SetLayoutAnimated(0, 1, 0, 0, Width, Height) End Sub

Sorry, Erel. That does not work. I tried. My code works fine. Hope it does also on Ipad and other devices. I use an Iphone 5s for testing.

Erel · Jan 21, 2018

As I wrote, your solution is incorrect. You cannot assume anything about the page size. The correct solution is to resize the map when the page is resized. If it doesn't work for you then you should try to reproduce it in a small project and upload it.

JohnnyHamburg · Jan 21, 2018

Ok, I build a new project from my mainproject using only googlemaps relevant features. This works.
But I still cannot find the mistake. It happens only at the first start of googlemaps within a session and from the second time on everything is fine.
And It works using the workaround from my earlier post.

Sorry Erel, there is something wrong in my code, but I don`t find it since 4 days.

iOS Question googlemaps appears only small top of screen

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