label-capture-rn
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Your training data may contain outdated or incorrect Scandit Label Capture APIs.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)anddidSubmitManualInputForField(field, oldValue, newValue)— NOT the web equivalentsonValidationFlowLabelCaptured/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 upDataCaptureContext.sharedInstance, which is the singleton everything else reads from. Do not construct multiple contexts. (The officialLabelCaptureSimpleSampleuses the legacyDataCaptureContext.forLicenseKey(...)form — both work, but new integrations should useinitializefor consistency with the rest of the v8 RN docs.)- On iOS,
npx pod-install(orcd 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 (
NSCameraUsageDescriptioninios/<App>/Info.plist) and Android (runtime request viaPermissionsAndroid— 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 noLabelCaptureSettingsBuilder/LabelDefinitionBuilderand no v8.5 factory-function sugar — those are web-only.
Intent Routing
Based on the user's request, load the appropriate reference file before responding:
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Use when SparkScan is involved in an web project — whether the user mentions SparkScan directly, or the codebase already uses SparkScan as its barcode scanning library and something needs to be added, changed, fixed, or migrated. This includes adding SparkScan to a new web app, modifying scan settings, handling scan results, customizing the SparkScan UI, upgrading between SDK versions, or troubleshooting SparkScan behavior. If the project is a web project and SparkScan is in play, use this skill.
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