iOS Question Document picker

Claude Brun · Jan 17, 2020

Hi,
I use documentpicker in one app.
App run fine on my iPhone and my iPad (iOS 12)
App crash on iPad of my son (iPad 2nd gen IOS 9)
Is it normal?

Thank

Andrew (Digitwell) · Jan 17, 2020

Have you tried running in debug mode on your son's phone and viewed the logs?

Claude Brun · Jan 18, 2020

Not yet because my son live about 800 km from me

Andrew (Digitwell) · Jan 18, 2020

Ah, I can see that would be a problem...

Erel · Jan 19, 2020

Can you post the code that shows the DocumentPickerViewController ?

Claude Brun · Jan 19, 2020

hi,
my code using documentpicker

B4X:

Sub btn_import_Click
'   log("btn_inport")
Dim imp As parse
Dim d, f As String
PlayBeep
inact_bntoutil
DocumentPicker.InitializeImport("picker", Array("public.data"))
DocumentPicker.Show(synthese, button2)
Wait For Picker_Complete (Success As Boolean, URLs As List)
If Success Then
  imp = parse_fic(URLs.Get(0))
  d = imp.dir
  f = imp.nom
  File.Copy(d, f, File.DirDocuments, f)
End If
act_bntoutil
End Sub

variable in Process_Clobal

B4X:

Private DocumentPicker As DocumentPickerViewController
Type parse(nom As String, dir As String)
Private hello, synthese As Page
Private button2 As Button

On the old iPad, app crash when i click on the button without showing documentpicker screen

Thank for your help

Erel · Jan 20, 2020

What is the output of Log(Button2) before you show the picker?

Add a BarButton with the designer and use it instead of button2. Does it work?

Claude Brun · Jan 20, 2020

log (Button2)
<B4IButtonWrapper: <UIButton: 0x1097adb30; frame = (101.381 101.381; 101.381 101.381); hidden = YES; opaque = NO; layer = <CALayer: 0x282471a40>>>

I can't use BarButton because on my layout Navigation Bar and Navigation Toolbar are disable

Erel · Jan 22, 2020

Try it as a test.

Claude Brun · Jan 22, 2020

Hi,
I Don't know how to create BarButton with designer.
I create BarButton 'br' with this code

B4X:

br.InitializeBitmap(LoadBitmapResize(File.DirAssets, "bbimp.png", 32dip, 32dip, True), "bbimp")
synthese.TopRightButtons = Array(br)

Using BarButton, DocumentPiker work fine on my iPhone but it do not work on my iPad (app do not crash but nothing happens. (for memory DocumentPicker work fine on my iPhone and my iPad with simple button)

log(br) on iPhone
<B4IBarButtonItemWrapper: <UIBarButtonItem: 0x104f2af70> target=0x104f29a30 action=toolbarClick: image=<UIImage: 0x282bc2e60>, {32, 32}>
log(br on iPad)
<B4IBarButtonItemWrapper: <UIBarButtonItem: 0x104c39ae0> target=0x104940cc0 action=toolbarClick: image=<UIImage: 0x280a63aa0>, {32, 32}>

Erel · Jan 22, 2020

Not sure whether it will help however it is worth a shot:
1. Add the iCloud capability to the app id and download a new provision profile.
2. Add this to your code:

B4X:

    #Entitlement:     <key>com.apple.developer.icloud-services</key><string>*</string><key>com.apple.developer.icloud-container-identifiers</key><array></array>
    #Entitlement: <key>com.apple.developer.icloud-container-development-container-identifiers</key><array></array>

Claude Brun · Jan 22, 2020

Results after many tests
Using button and initial provision profile :
- Ok on iPhone (IOS 12)
- Ok on iPad (IOS12)
- Crash on iPad (IOS9)

Using BarButton and initial provision Profile
- Ok on iPhone (IOS 12)
- nothing happens iPad (IOS12)
- Crash on iPad (IOS9)

Using button and new provision profile with iCloud capability (I was obliged to create explicit id, not possible to add iCloud capability with wildcard id)
- Ok on iPhone (IOS 12)
- Ok on iPad (IOS12)
- Crash on iPad (IOS9)

however, On old iPad it is possible to import a document into app. Selecting then file on the cloud and open with my app. App open and the file is in dir.document folder.

Thank

Erel · Jan 23, 2020

I'm sorry but it is difficult to solve it without seeing the logs.

Claude Brun · Jan 23, 2020

I understand.
Is there a solution a have log with a device not on local network

Erel · Jan 23, 2020

Have you tried to catch the error with Try / Catch block?

You can then show some of the information with a dialog.

Claude Brun · Jan 26, 2020

Indeed, with Try / Catch I was able to obtain information about the crash
App crash on DocumentPicker.Show and LastException is :
<B4IExceptionWrapper: Error Domain=caught_exception Code=0 "Object was not initialized (UIDocumentPickerViewController)" UserInfo={NSLocalizedDescription=Object was not initialized (UIDocumentPickerViewController)}>

My variable DocumentPicker is declared on Process Global as :
Private DocumentPicker As DocumentPickerViewController

B4X:

Sub btn_import_Click
'   log("btn_inport")
    Dim imp As parse
    Dim d, f As String
    PlayBeep
    inact_bntoutil
    Try
    DocumentPicker.InitializeImport("picker", Array("public.data"))
    Catch
        Creat_Log("btn_import DP init", LastException)
        hd.toastmessageshow("Erreur : Voir fichier Log",False)
    End Try
    Try
    DocumentPicker.Show(synthese, button2)
    Catch
        Creat_Log("btn_import DP Show", LastException)
        hd.toastmessageshow("Erreur : Voir fichier Log",False)
    End Try
    Try
    Wait For Picker_Complete (Success As Boolean, URLs As List)
    If Success Then
        imp = parse_fic(URLs.Get(0))
        d = imp.dir
        f = imp.nom
        File.Copy(d, f, File.DirDocuments, f)
    End If
    Catch
        Creat_Log("btn_import DP Wait", LastException)
        hd.toastmessageshow("Erreur : Voir fichier Log",False)
    End Try
    act_bntoutil
End Sub

on iPhone or iPad with IOS 12 this sub work fine. App crash only on old Ipad with IOS 9

Erel · Jan 27, 2020

It means that the picker initialization failed for some reason.

Try to provide an additional different way to access documents: List of methods to access external resources or share to external apps

Claude Brun · Jan 27, 2020

CFBundleDocumentTypes work on the old iPad

the first error is of course the init.
<B4IExceptionWrapper: Error Domain=caught_exception Code=0 "Application initializing document picker is missing the iCloud entitlement. Is com.apple.developer.icloud-container-identifiers set?" UserInfo={NSLocalizedDescription=Application initializing document picker is missing the iCloud entitlement. Is com.apple.developer.icloud-container-identifiers set?}>

I use an App ID with iCloud capabilities and i create a new provision profile with this ID
The 2 lines #Entitlement have been added

my iCloud container identifier is same that App ID (with 'iCloud.' at the beegining)

must specify iCloud Container identifier in b4i?

Erel · Jan 29, 2020

This issue will only happen on devices running iOS 10-. These devices make about 2% of all devices. Provide a different way to choose documents on older device or set #MinVersion to 11.

Claude Brun · Jan 29, 2020

Thank you for your help,
I will manage the import differently on older device.
It is Ok with CFBundleDocument

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