Stripe-ios: Allow use of other card scan libraries

[TomWFox]

Summary

The ability to easily integrate the CardIO library with the stripe SDK is great. However, as the CardIO library hasn't been maintained for a long time and has now been archived I don't think it makes sense to rely on it any more.

There are other options available for card scanning, the best I have found is cardscan. It is actively maintained and is offered for free to small business/those who do not want to use the commercial fraud prevention offering.

I think it would be great to support CardScan as well as or instead of CardIO or maybe open up the STPAddCardViewController for easy custom integration?

[davidme-stripe]

Thanks for filing this! We're looking into adding CardScan support in the near future.

[TomWFox]

Awesome to hear, looking forward to it!

[kunshah]

Awesome to hear, Waiting for this integration!

[csabol-stripe]

Updating here that we are still actively working on finding a replacement for CardIO integration in our SDK. Hopefully more to report in the coming months

[davidme-stripe]

We're tracking a replacement here: #1629

[davidme-stripe]

Our new card scanner is available in SDK 20.0.0.

[SudoPlz]

@davidme-stripe is that card-scanner implementation using card-io (or CardScan) below the hood, or did you implement this from scratch?

[davidme-stripe]

It uses the built-in iOS OCR framework. The source is in STPCardScanner.swift, feel free to inspect and reuse it under the terms of the MIT License.