Chapter 4. Passbook, Apple’s digital wallet

This chapter covers

  • Barcodes: the technology that makes Apple’s Passbook system possible
  • Micro-documents as a convenient digital alternative to paper tickets and plastic cards
  • Creating Passbook tickets with Ruby
  • A method for validating Passbook tickets without a server

We have all come into contact with small documents that provide some benefit if we present them to the right person at the right time in the right location. Such documents include movie tickets that allow you to enter the movie theater, coupons that entitle you to receive a promotional discount for certain products, membership cards that let you enter the gym, loyalty cards for collecting loyalty points at the supermarket chain ...

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