Question

I have a very simple app where the user selects an image from the iOS photo gallery.

The TIBlob passed to Titanium.Media.openPhotoGallery.success event is then passed to an application-level event.

The issue is that the TIBlob is NULL when the application level event is received.

Below is a complete code sample.

Titanium.UI.setBackgroundColor('#000');

var win = Ti.UI.createWindow({title: 'Camera Test', exitOnClose: true, fullscreen: true, backgroundColor: '#ffffff'});

var bt = Ti.UI.createButton({'title': 'Gallery', top: 10, width: 200, height: 50});
bt.addEventListener('click', function(e) {
    Titanium.Media.openPhotoGallery({
            success:function(event) {   
                if(event.mediaType == Ti.Media.MEDIA_TYPE_PHOTO) {
                    alert(event.media);
                    Ti.App.fireEvent('uploadImage', {image: event.media, source: 'gallery'});
                }else {
                    alert('Image was not uploaded because the type was invalid.');
                }
            },
            cancel:function() {
            },
            error:function(err) {
                alert('Error selecting image from gallery: ' + err);
                Ti.API.error(err);
            },
            allowEditing: false,
            autohide: true,
            mediaTypes:[Ti.Media.MEDIA_TYPE_PHOTO]
      });
});

Ti.App.addEventListener('uploadImage', function(e) {
    alert(e.image);
    alert(e.source);
});

win.add(bt);
win.open();

Any suggestions?

Answer 1

The Appcelerator Guides say that objects passed through and event must be JSON-serializable https://wiki.appcelerator.org/display/guides/Event+Handling#EventHandling-Firingevents. A TiBlob is not serializable, so I think the blog is not making it through the event.

If this really is a very simple app, I would suggest changing that to a function call instead of firing an event and the blob will be preserved. However, if this absolutely needs to be an event, you could pass event.media.nativePath instead and then read a blob out of that when you actually need to do something with it.