[TIMOB-9492] iOS: loss of reference to functions using event handlers

var win = Ti.UI.createWindow({
	backgroundColor: '#efefef',
	title: 'Test'
});

openCameraButton = Ti.UI.createButton({
	style: Ti.UI.iPhone.SystemButtonStyle.BORDERED,
	title: 'Open Camera'
});

openCameraButton.addEventListener('click', function(e) {
	var cameraOverlay = Ti.UI.createView();
	
	var takePhotoButton = Ti.UI.createButton({
		backgroundColor: '#fff',
		backgroundSelectedColor: '#efefef',
		borderColor: '#000',
		borderRadius: 17,
		borderWidth: 1,
		bottom: 65,
		color: '#000',
		height: 34,
		opacity: 0.4,
		title: 'Take Photo',
		width: 100
	});
	
	var closeCameraButton = Ti.UI.createButton({
		backgroundColor: '#fff',
		backgroundSelectedColor: '#efefef',
		borderColor: '#000',
		borderRadius: 17,
		borderWidth: 1,
		bottom: 65,
		color: '#000',
		height: 34,
		opacity: 0.4,
		right: 10,
		title: 'Close Camera',
		top: 10,
		width: 150
	});
	
	takePhotoButton.addEventListener('click', function(e) {
		Ti.Media.takePicture();
	});
	
	closeCameraButton.addEventListener('click', function(e) {
		alert('closing camera');
		Ti.Media.hideCamera();
	});
	
	cameraOverlay.add(takePhotoButton);
	cameraOverlay.add(closeCameraButton);
	
	Ti.Media.showCamera({
		success: function(e) {
			alert('success callback');
		},
		cancel: function() {
			Ti.API.info('cancel callback');
		},
		error: function(e) {
			Ti.API.info('error callback');
		},
		allowEditing: false,
		animated: false,
		autohide: false,
		mediaTypes: [Ti.Media.MEDIA_TYPE_PHOTO],
		overlay: cameraOverlay,
		saveToPhotoGallery: false,
		showControls: false
	});
});

win.add(openCameraButton);
win.open();