Adding photo upload to an iPhone App that's mostly HTML5/JS

I'm working on an iPhone App that's HTML5/JS displayed in a single UI Webview. I'd like to add photo upload capabilities, and I'm wondering what the best approach would be to extend the iPhone app with the necessary classes to pick a photo and upload via an API. I'd also like to trigger the display of the photo picker via JS if that's possible.

I know it's possible to use a framework like PhoneGap to do this, but I don't want to migrate the whole app to a new framework yet. Als开发者_如何学JAVAo, sorry for the "how to" type question - I normally ask about specific problems after I've exhausted my efforts, but I'm pretty new to Objective C, so I'd appreciate some guidance, even if it's just a simple design explanation.

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the image picker (UIImagePicker) is fairly straightforward to work with: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIImagePickerController_Class/UIImagePickerController/UIImagePickerController.html

and for an API, are you sending it to an existing system? or creating your own. You just need to craft an NSMutableURLRequest with POSTED data in a multi-part format, and then handle the image portion appropriately in your server.

this might help: upload image from iPhone application