iOS Question iTabStrip

Cristian Achim · Jul 25, 2024

Hello,
I have a problem with iTabStrip library. I want to automatically remove second tab/page when first tab/page is selected.
I have following code that works fine if I press on the first tab of the TabStrip.

B4X:

Sub TabStrip_PageSelected (Position As Int)
    If Position = 0 Then
        Page1.RootPanel.RemoveAllViews
        TabPages.RemoveAt(1)
        TabStrip.SetPages(TabPages)
    End If
End Sub

The problem appear when I try to select first tab from code with one of those commands:
TabStrip.CurrentPage = 0 OR TabStrip_PageSelected(0)

The app crash with following error:

B4X:

Error occurred on line: 1307 (App_Order)
*** -[__NSArrayM removeObjectsInRange:]: range {1, 1} extends beyond bounds [0 .. 0]
Stack Trace: (
  CoreFoundation       00E76A98-210C-3CB5-930B-F236807FF24C + 540460
  libobjc.A.dylib      objc_exception_throw + 60
  CoreFoundation       00E76A98-210C-3CB5-930B-F236807FF24C + 82696
  RTOrder              -[B4IList RemoveAt:] + 60
  CoreFoundation       00E76A98-210C-3CB5-930B-F236807FF24C + 133140
  CoreFoundation       00E76A98-210C-3CB5-930B-F236807FF24C + 129120
  RTOrder              +[B4I runDynamicMethod:method:throwErrorIfMissing:args:] + 1296
  RTOrder              -[B4IShell runVoidMethod] + 208
  RTOrder              -[B4IShell raiseEventImpl:method:args::] + 1608
  RTOrder              __40-[B4IShell raiseEventImpl:method:args::]_block_invoke + 36
 libdispatch.dylib    81D355DF-266A-3010-BAB8-113B76A206C1 + 8508
 libdispatch.dylib    81D355DF-266A-3010-BAB8-113B76A206C1 + 15828
 libdispatch.dylib    81D355DF-266A-3010-BAB8-113B76A206C1 + 75172
 libdispatch.dylib    _dispatch_main_queue_callback_4CF + 44
 CoreFoundation       00E76A98-210C-3CB5-930B-F236807FF24C + 354064
 CoreFoundation       00E76A98-210C-3CB5-930B-F236807FF24C + 342292
 CoreFoundation       CFRunLoopRunSpecific + 608
 GraphicsServices     GSEventRunModal + 164
 UIKitCore            1741FA37-4E53-371E-8DAE-D611AAB0043D + 4237580
 UIKitCore            UIApplicationMain + 340
 RTOrder              main + 100
 dyld                 71846EAC-EE65-3697-BF7D-790B6A07DCDB + 249420
)

Thank you!

Cristian Achim · Jul 25, 2024

Hello!
I solved with this:

B4X:

Sub ChangePageNoAnimation (Index as Int)
Dim no As NativeObject = TabStrip1
no.RunMethod("moveToViewControllerAtIndex:animated:", Array(Index, False))
End Sub

Thank you @Erel!

iTabStrip - set current page without animation

Hi, Is there any way to set the current page without a animated transition or scroll effect? I did not find any option in iTabStrip. But the source code of XLPagerTabStrip looks like there is in PagerTabStripViewController an option to enable or disable the animation when current page is set...

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iOS Question iTabStrip

Cristian Achim

Member

Cristian Achim

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iTabStrip - set current page without animation

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iOS Question iTabStrip

Cristian Achim

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