Bug? List.Sort by iOS 18

[Filippo]

Hi,

when using the “lst.sort” function, all my apps from iOS 18 onwards crashed.

Here is my code:

Private Sub goShowSavedLaps
    Dim lst As List
    Dim strTmp As String
    lst.Initialize

    'Eine Liste mit alle Dokumenten erstellen
    lst = File.ListFiles(File.DirDocuments)
   
    If lst.Size > 0 Then
        lst.Sort(True)
        clvStoredRace.Clear
        For i = 0 To lst.Size -1
            strTmp = lst.get(i)
            If strTmp.EndsWith(ext) Then
                strTmp = strTmp.Replace(ext,"")
                clvStoredRace.Add(CreateLapListItem(strTmp, clvStoredRace.GetWidth, 50dip), lst.get(i))
            End If
        Next
    Else
        hd.ToastMessageShow("NoLapSaved"), True)
    End If
End Sub

Here is part of the crash:

Date/Time: 2024-09-18 12:47:50.823 +0200
OS Version: iPadOS 18.0 (22A3354)
Report Version: 104

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000 at 0x0000000000000000
Crashed Thread: 0

Application Specific Information:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Swift.__SwiftDeferredNSArray sortUsingComparator:]: unrecognized selector sent to instance 0x3034c37c0'

 

[Erel]

Checking

 

[Erel]

Tested with iOS 18:

Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
    Dim lst As List
    lst.Initialize
    For i = 1 To 100
        lst.Add(Rnd(1, 1000))
    Next
    lst.Sort(True)
    Log(lst)
End Sub

Works fine.

 

[Erel]

Just saw @OliverA smart comment.

 

[OliverA]

Tested with iOS 18:

I think the issue is with the list returned by ListFiles. Either the type of array returned has changed (from the underlying code) or the list now contains an object that is not a string or a number.

 

[OliverA]

Just saw @OliverA smart comment.

Yeah, but the read only list still sorts. It only bombs when adding / removing items from the list. I think the issue lies as stated in my comment above.

 

[Erel]

This works:

Dim lst As List
lst.Initialize
lst.AddAll(File.ListFiles(File.DirDocuments))
lst.Sort(True)
Log(lst)

 

[Erel]

Something has changed in iOS 18 and File.ListFiles returns an immutable array right now. I'm keeping this open for now. Workaround is suggested above. I might modify the core library to make an internal copy.

 

[OliverA]

I might modify the core library to make an internal copy.

I was in the middle of asking if this is a temp fix or if a fix will be issued (to keep code behavior the same on all platforms). But, of course, I was Ninja'd ?

 

[Filippo]

Something has changed in iOS 18 and File.ListFiles returns an immutable array right now. I'm keeping this open for now. Workaround is suggested above. I might modify the core library to make an internal copy.

Hi Erel,

should I wait until you have customized the Core-Library, or is it better to use this workaround so that I can update my apps?

 

[Filippo]

Hi Erel,

you can take your time for all I care, I've already updated and uploaded all my apps.

 

[Erel]

Fixed with iCore v8.52: https://www.b4x.com/android/forum/threads/updates-to-internal-libraries.48179/

 

[Filippo]

@Erel , I just tested it and it works without any problems, thank you!