Check sourceType in the IosImagePicker plugin

SimplesApps · December 2012

Hi,
I'm testing the IosImagePicker plugin class from Andy Bower @bowerandy

Before setting the sourceType to the picker (setSourceType(sourceType)) Apple recommends to ask if the sourceType is available by means of calling the isSourceTypeAvailable method of the UIImagePickerController class.
Apple says you never have to assume that a device has a photo library, even if the device has a library, this method could still return NO if the library is currently unavailable, or the device simply has no camera (if you're trying to set it):

http://developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/CameraAndPhotoLib_TopicsForIOS/Articles/PickinganItemfromthePhotoLibrary.html

How could be improved the code for the IosImagePicker.lua to have this method into account?

Thanks,
David.

bowerandy · January 2013

@SimplesApps, sorry I didn't see this message when you posted it originally.

I'm assuming, because you mention IosImagePicker.lua above, that you are using the Hot Wax version of the image picker and not the ObjectiveC plugin that I wrote sometime before. If so, you can easily test a particular source type is available by adding these methods to IosImagePicker:

function IosImagePicker:isSourceAvailable(sourceType)
	-- Answer true if the supplied sourceType is actually available on the device
	return UIImagePickerController:isSourceTypeAvailable(sourceType)
end
 
function IosImagePicker:hasPhotoLibrary()
	-- Helper method to return true if the device has an active photo library
	return self:isSourceAvailable(UIImagePickerControllerSourceTypePhotoLibrary)
end
 
function IosImagePicker:hasSavedPhotosAlbum()
	-- Helper method to return true if the device has an active album for saved photos
	return self:isSourceAvailable(UIImagePickerControllerSourceTypeSavedPhotosAlbum)
end

Now you can wrap any call to the image picker with an if test:

    if picker:hasPhotoLibrary() then
	picker:pickImage(UIImagePickerControllerSourceTypePhotoLibrary,
                self.onImagePicked, self) 
    end

best regards

SimplesApps · January 2013

@bowerandy thanks, it's working. :-bd

Best regards,
David.

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