🔲 QR codes look simple. But they’re powerful.
Most apps treat QR as just another feature.
I recently built a QR Code Generator & Scanner in SwiftUI — and it reminded me that QR is not a UI component…
It’s an offline data bridge.
Here’s what’s actually happening:
Text → Encoded using Core Image → Rendered as QR → Scanned via AVFoundation → Decoded instantly → Triggers real app behavior
That means QR can power:
- Offline authentication
- Secure device pairing
- Payment flows
- Deep linking
- Data sharing without internet
The most interesting part?
iOS does the heavy lifting — you just need to structure the pipeline correctly.
*I wrote a detailed breakdown of the full generation & scanning architecture here *👇
Mastering QR Code Generation & Scanning in SwiftUI
If you're building QR-based features (payments, login, pairing), I’d love to exchange ideas.
Top comments (1)
Framing QR as an offline data bridge is spot on. Worth noting: for secure pairing, you can embed a one-time nonce in the payload to prevent replay attacks.