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label-capture-rn

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Updated 10-16 04:57

About this skill

Label Capture React Native Skill

Critical: Do Not Trust Internal Knowledge

Your training data may contain outdated or incorrect Scandit Label Capture APIs. Label Capture has evolved across recent SDK releases, and the React Native plugin surface (imports, native linking, pod install, package names) has its own conventions distinct from the web SDK.

Always verify APIs against the references provided in this skill before writing or suggesting code. Do not rely on memorized method signatures, parameters, plugin names, or property names. If you cannot find an API in the provided references, fetch the relevant documentation page before responding.

React Native-specific gotchas worth flagging:

  • Listener method names are iOS-style on React Native. The Validation Flow listener uses didCaptureLabelWithFields(fields) and didSubmitManualInputForField(field, oldValue, newValue) — NOT the web equivalents onValidationFlowLabelCaptured / onManualInput. If you see web-style listener names suggested, they are wrong on React Native.
  • DataCaptureContext.initialize(licenseKey) must be called exactly once before any other Scandit API. It sets up DataCaptureContext.sharedInstance, which is the singleton everything else reads from. Do not construct multiple contexts. (The official LabelCaptureSimpleSample uses the legacy DataCaptureContext.forLicenseKey(...) form — both work, but new integrations should use initialize for consistency with the rest of the v8 RN docs.)
  • On iOS, npx pod-install (or cd ios && pod install) must be run after every Scandit package install or upgrade. Android auto-links via Gradle.
  • Metro's bundler cache frequently masks Scandit package upgrades. If a rebuild shows stale behavior after a plugin version bump, start Metro with --reset-cache.
  • Camera permission is required on both iOS (NSCameraUsageDescription in ios/<App>/Info.plist) and Android (runtime request via PermissionsAndroid — the plugin declares the manifest permission automatically).
  • Field definitions on RN are class-based, not builder-based: CustomBarcode.initWithNameAndSymbologies(name, [...]), new ExpiryDateText(name), field.optional = true, LabelCaptureSettings.settingsFromLabelDefinitions([...], {}). There is no LabelCaptureSettingsBuilder / LabelDefinitionBuilder and no v8.5 factory-function sugar — those are web-only.

Product Guidance

Apply these rules whenever the user is making a design decision, not just an API question. They reflect how Scandit recommends Label Capture be integrated.

  • Default to the Validation Flow. New integrations should use LabelCaptureValidationFlowOverlay, not LabelCaptureBasicOverlay. Recommend the basic/advanced overlay path only when the customer explicitly needs a live AR overlay or a UI that the Validation Flow's fixed layout cannot produce. See references/validation-flow.md.
  • Validation Flow must be rendered full-screen. Do not place it inside a card, half-sheet, modal slice, or partial-height widget — the layout assumes full-screen height for the field checklist, manual-entry sheet, and keyboard.
  • Prefer pre-made labels first, then pre-made fields, then custom. Try in this order: (1) does a pre-made label definition cover the use case? — LabelDefinition.createVinLabelDefinition(name), LabelDefinition.createPriceCaptureDefinition(name), LabelDefinition.createSevenSegmentDisplayLabelDefinition(name). (2) Can the label be built from pre-made fields? — ExpiryDateText, PackingDateText, DateText, WeightText, UnitPriceText, TotalPriceText, SerialNumberBarcode, PartNumberBarcode, ImeiOneBarcode, ImeiTwoBarcode. (3) Only as a last resort, fall back to CustomText / CustomBarcode.
  • Start from the sample app on greenfield integrations. If the user is starting from scratch, recommend cloning LabelCaptureSimpleSample (link in the References table below) and adapting it, rather than wiring everything from zero.
  • Hand off to the data-capture-sdk skill for non-Label-Capture questions. If the user asks about another Scandit product (Barcode Capture, SparkScan, MatrixScan, ID Capture, etc.) or about choosing between products, defer to the data-capture-sdk skill instead of guessing.

Intent Routing

Based on the user's request, load the appropriate reference file before responding:

  • Integrating Label Capture from scratch (e.g. "add Label Capture to my app", "scan a price tag with barcode and expiry date", "how do I use Smart Label Capture") → read references/integration.md and follow the instructions there. By default, integrate the Validation Flow (the integration guide leads with it).
  • Validation Flow questions (e.g. "how do I customize the Validation Flow", "what can we change in the VF?", "why is it implemented this way", "how do I react to manual edits", "can I change the colors") → read references/validation-flow.md.
  • Visual customization beyond the Validation Flow (e.g. "I want a live AR overlay", "I want to draw a tag next to each captured field", "how do I get the camera frame during scanning") → read references/customization.md.
  • Adaptive Recognition Engine / cloud fallback / receipt scanning ("how do I enable ARE", "use cloud recognition", "scan a receipt", "AdaptiveRecognitionMode", "is ARE available in production") → read references/adaptive-recognition.md.
  • Migrating or upgrading an existing Label Capture integration (e.g. "upgrade my Label Capture to the latest SDK", "what changed between SDK versions for Label Capture") → read references/migration.md and follow the instructions there.

API Usage Policy

Only use APIs that are explicitly documented in the Scandit references below. Do not invent or guess method signatures, parameters, property names, or imports. If unsure whether an API exists or how it is called — or if a TypeScript / runtime error occurs — fetch the relevant reference page before responding. Do not tell the user to check the docs themselves. After answering, always include the relevant link so the user can explore further.

Never construct or guess documentation URLs. When you need a specific class or property's API page:

  1. First check whether the page you already fetched (e.g. the Advanced Configurations page) contains a direct hyperlink to it — topic pages link directly to relevant API symbols. Always request links alongside content in your fetch prompt.
  2. If no direct link was found, fetch the API index (see Full API reference in the table below), extract the actual link from it, and follow that.

URL structures vary across SDK versions and package paths (e.g. api/ui/ subdirectory) and guessing will lead to 404s.

Framework variant policy

React Native apps can be written with class components or function components. Examples in this skill use function components with hooks because they match the official LabelCaptureSimpleSample and the current React Native convention. Even if the target project still contains legacy class components elsewhere, write new Label Capture code as function components — do not rewrite the rest of the app's component style, but keep the Label Capture integration itself on the current idiom (useRef, useEffect, useMemo, imperative ref callback for view-level properties).

Examples are in TypeScript (.tsx). If the target project is plain JavaScript (.js / .jsx), drop the type annotations and keep the same imports and structure.

Licence key

Scanning needs a Scandit licence key. For this skill the licence product is native and the licence platforms are ios and android.

Work through these in order — never block the user on MCP:

  1. The Scandit MCP server is connected — call ensure_scanner_setup with product native and platforms ios and android, then run the command get_license_env_command returns, which writes the key into the project's .env. Show at most a masked preview in chat; never print a full key.

  2. It is not connected — offer to connect it once, then continue from step 1:

    • Claude Code: claude mcp add --transport http scandit https://ssl.scandit.com/mcp
    • Cursor: add {"mcpServers": {"scandit": {"url": "https://ssl.scandit.com/mcp"}}} to ~/.cursor/mcp.json
    • VS Code: add {"servers": {"scandit": {"type": "http", "url": "https://ssl.scandit.com/mcp"}}} to the MCP user configuration

    Authentication is browser-based, so it is not supported headless or in CI. The server provisions trial keys only; it never creates, revokes, or modifies production licences.

  3. The user declines, or has no MCP client — they generate a key themselves at https://ssl.scandit.com (no account yet: https://ssl.scandit.com/dashboard/sign-up?p=test) and paste it in.

Then put the key into the code in place of the placeholder; a key in .env does not reach the app by itself. React Native does not load .env by itself: add a loader such as react-native-config, or use the simplest route below. The simplest route on any platform: read .env and put the key into the licence-key call directly, still showing only a masked preview in chat.

References

Direct users to the right resource based on their question:

Topic Resource
React Native integration Get Started · Sample (LabelCaptureSimpleSample)
Label Definitions (fields, regex, presets) Label Definitions
Advanced topics (Validation Flow customization, adaptive recognition, custom overlays) Advanced Configurations
Full API reference Label Capture API