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  1. Qt
  2. QTBUG-117832

Qt-6.5 + iOS + QFileDialog::getOpenFileUrl(), unable to read file content

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Details

    • Bug
    • Resolution: Unresolved
    • P2: Important
    • None
    • 6.4.3, 6.5.2, 6.5.3
    • Widgets: Widgets and Dialogs
    • None
    • developer environment: mac Mini Apple M2, macOS 13.4.1
      deployment device: iPad gen. 5, iPadOS 16.5.1
    • iOS/tvOS/watchOS

    Description

      Hello.

      I'm trying to read the file content of a file which I want to select using the QFileDialog::getOpenFileUrl() method. I'm using Qt-6.5.3. The code is quite simple:

      QUrl url = QFileDialog::getOpenFileUrl(0, caption, dir, filter);
qDebug() << "Received URL: " << url;
QFile file(url.toLocalFile());
QFileInfo fi(url.toLocalFile());
qDebug() << "File " << url.toLocalFile() << " size: " << file.size() << " exists: " << file.exists();
qDebug() << "FileInfo " << url.toLocalFile() << " size: " << fi.size() << " exists: " << fi.exists();

      When compiled with Qt-6.5.3 the code generates the following output:

      [DocumentManager] revealDocumentAtURL encountered an error: (null)
warning: stale focus object 0x0 , doing manual update (/Users/qt/work/qt/qtbase/src/plugins/platforms/ios/qiosinputcontext.mm:635, virtual void QIOSInputContext::update(Qt::InputMethodQueries)())
debug: Received URL:  QUrl("file:///private/var/mobile/Containers/Data/Application/4F4DE0D2-2150-4DFE-902A-48A581B43FE4/Documents/Datovka/Email/9201992/textova-zprava.pdf")
debug: File  "/private/var/mobile/Containers/Data/Application/4F4DE0D2-2150-4DFE-902A-48A581B43FE4/Documents/Datovka/Email/9201992/textova-zprava.pdf"  size:  0  exists:  false
debug: FileInfo  "/private/var/mobile/Containers/Data/Application/4F4DE0D2-2150-4DFE-902A-48A581B43FE4/Documents/Datovka/Email/9201992/textova-zprava.pdf"  size:  0  exists:  false
[DocumentManager] The view service did terminate with error: Error Domain=_UIViewServiceErrorDomain Code=1 "(null)" UserInfo={Terminated=disconnect method}

      The URL cannot be read in Qt-6.5.

      But the code seems to work fine with Qt-5.15:

      [DocumentManager] revealDocumentAtURL encountered an error: (null)
[DocumentManager] Failed to associate thumbnails for picked URL file:///private/var/mobile/Containers/Data/Application/4F4DE0D2-2150-4DFE-902A-48A581B43FE4/Documents/Datovka/Email/9201992/textova-zprava.pdf with the Inbox copy file:///private/var/mobile/Containers/Data/Application/B056D293-E406-4B68-B693-EF8A30DFB320/tmp/cz.nic.mobile-datovka.testing-Inbox/textova-zprava.pdf: Error Domain=QLThumbnailErrorDomain Code=102 "(null)" UserInfo={NSUnderlyingError=0x281389b90 {Error Domain=GSLibraryErrorDomain Code=3 "Generation not found" UserInfo={NSDescription=Generation not found}}}
warning: stale focus object QObject(0x0) , doing manual update (qiosinputcontext.mm:670, virtual void QIOSInputContext::update(Qt::InputMethodQueries)())
debug: Received URL:  QUrl("file:///private/var/mobile/Containers/Data/Application/B056D293-E406-4B68-B693-EF8A30DFB320/tmp/cz.nic.mobile-datovka.testing-Inbox/textova-zprava.pdf")
debug: File  "/private/var/mobile/Containers/Data/Application/B056D293-E406-4B68-B693-EF8A30DFB320/tmp/cz.nic.mobile-datovka.testing-Inbox/textova-zprava.pdf"  size:  4344  exists:  true
debug: FileInfo  "/private/var/mobile/Containers/Data/Application/B056D293-E406-4B68-B693-EF8A30DFB320/tmp/cz.nic.mobile-datovka.testing-Inbox/textova-zprava.pdf"  size:  4344  exists:  true
[DocumentManager] The view service did terminate with error: Error Domain=_UIViewServiceErrorDomain Code=1 "(null)" UserInfo={Terminated=disconnect method}

      Data from the URL can be read in Qt-5.15.

      The difference between Qt-6.5 and Qt-5.15 seems to be that 5.15 creates a copy and then passes the URL onto the copy

      file:///private/var/mobile/Containers/Data/Application/B056D293-E406-4B68-B693-EF8A30DFB320/tmp/cz.nic.mobile-datovka.testing-Inbox/textova-zprava.pdf

      whereas 6.5 passes the URL to the original file

      file:///private/var/mobile/Containers/Data/Application/4F4DE0D2-2150-4DFE-902A-48A581B43FE4/Documents/Datovka/Email/9201992/textova-zprava.pdf

      .

      Is there a bug in Qt-6?

      Than you very much for the response.

      Attachments

        Issue Links

          depends on

          Task - A task that needs to be done. QTBUG-120528 Support accessing security-scoped URLs on macOS/iOS

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported
          For Gerrit Dashboard: QTBUG-117832
          # Subject Branch Project Status CR V
          527335,2 Fix accessing security scopes URLs in iOS file dialog dev qt/qtbase Status: DEFERRED 0 0

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              dorisverria Doris Verria
              martinstraka Martin Straka
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              Dates

                Created:
                Updated:

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