The stock data is to download from web and unzipped it to some binary files in Library/Cache folder.
The zip file just plain text for one day stock data, so that the updating should be done every day if you want the newest data.
I hope the first view like in picture, what kind of view controller and view should be used? my plan is to use a UITableView and a UIView, but I hope the head of table can be fixed and not scroll, what can I do?