Abstract-it discusses how to transmit data between the iOS
client and the web server, and how to store data on iOS device
terminal. Taking the ordering system as an example, the
architecture and function of the ordering system based on iOS
platform client terminal is proposed. It focuses on data
transmission between iOS client and server, JSON technology is
used to achieve data interaction; Data storage in iOS client is also
discussed, Sqlite3 and FMDB Frame are used to store data.
Key Words-iOS; Data transmission; Data storage