FileChooser::isPlatformDialogAvailable() return false if iCloud is disabled on device?

MacOSX and iOS
1

My app uses a native file chooser. All is/was fine on iOS11. It continues to work just fine.

With the update to iOS 12 though, now FileChooser::isPlatformDialogAvailable() returns false on iOS12 devices.

Is there some new project configuration to be aware of to make this work on iOS12?

2

No, it should work as expected. I’ve just tried this with a device running iOS 12.0.1 and native FileChoosers are working fine.

That method only returns false if the JUCE_DISABLE_NATIVE_FILECHOOSERS flag is set - have you defined it somewhere?

3

What device did you try it on?

This is still an issue for me.

For me, it shows up on an iPhone 6s+, and an iPhone 7 which I recently updated to 12.0.1. It doesn’t show up on the 4 other iOS devices that I have which are also iOS 12. I have absolutely no idea why… it used to work just fine on those two devices before the upgrade.

4

I tested it on a 6s. I’ll try to get hold of one of those devices and test it out.

5

Newer devices are working fine for me too. Are you able to reproduce this with a simple test app? Here’s the PIP that I am using to test it out:

/*******************************************************************************
 The block below describes the properties of this PIP. A PIP is a short snippet
 of code that can be read by the Projucer and used to generate a JUCE project.

 BEGIN_JUCE_PIP_METADATA

  name:             iOSNativeFileBrowser
  vendor:           JUCE
  website:          www.juce.com

  dependencies:     juce_core, juce_data_structures, juce_events, juce_graphics, juce_gui_basics
  exporters:        xcode_iphone

  type:             Component
  mainClass:        MyComponent

 END_JUCE_PIP_METADATA

*******************************************************************************/

#pragma once


//==============================================================================
class MyComponent   : public Component
{
public:
    //==============================================================================
    MyComponent()
    {
        addAndMakeVisible (showFileChooserButton);
        showFileChooserButton.onClick = [this]
        {
            FileChooser chooser ("FileChooser");
            
            if (chooser.browseForDirectory())
                DBG (chooser.getResult().getFullPathName());
        };
        
        setSize (600, 400);
    }

    ~MyComponent()
    {
    }

    //==============================================================================
    void paint (Graphics& g) override
    {
        g.fillAll (getLookAndFeel().findColour (ResizableWindow::backgroundColourId));
    }

    void resized() override
    {
        showFileChooserButton.centreWithSize (250, 35);
    }


private:
    //==============================================================================
    TextButton showFileChooserButton { "Show file chooser" };


    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MyComponent)
};
6

I can confirm that with the above pip, it works just fine on an iPhone X and an iPad mini 2, and does not work on an iPhone 6s+ or an iPhone 7.

See screenshots - first is obviously the 6s+, second is the X.

iPhone6s%20
iPhone6s .png1242×2208 64.9 KB
iPhoneX
iPhoneX.jpg1125×2436 240 KB

7 
bool FileChooser::isPlatformDialogAvailable()
{
   #if JUCE_DISABLE_NATIVE_FILECHOOSERS
return false;
   #else
return [[NSFileManager defaultManager] ubiquityIdentityToken] != nil;
   #endif
}

The native dialog should still be available for phone-located file browsing even if the iCloud is disabled, should it not ?!?! My problem, I determined, arose because I was not signed into iCloud on the 2 devices I mentioned (6s+ and 7). I didn’t realize this was a constraint to use the native dialog, but I am confused about why this constraint is in place. Can you clarify this for me?

8

No, the iOS native file browser requires iCloud to be enabled on the device and for the user to have logged in at least once.