You are close. Here's some sample code that works for me.
Add properties for the variables you create that you want to share
properties (Access = private)
Camera % webcam stream object
himg % image object handle
end
My startupFcn looks like this
value = app.CameraStreamSwitch.Value;
if strcmpi(value,'on')
preview(app.Camera,app.himg)
end
I would also suggest adding a closing function so the webcam doesn't remain open once the app closes.
% Close request function: UIFigure
function UIFigureCloseRequest(app, event)
delete(app)
delete(app.Camera)
end
