| name | share-extension |
| description | Share extension: share sheet integration, content validation, App Group data sharing between app and extension. Use when enabling share-from-other-apps functionality, receiving shared content, or sharing data via App Groups. Triggers: share extension, share sheet, NSExtensionContext, App Group, SLComposeServiceViewController. |
Share Extension
SHARE EXTENSION:
SETUP: Requires separate extension target (kind: "share" in plan extensions array).
The extension receives shared content (URLs, text, images) from other apps via the share sheet.
PRINCIPAL CLASS (in extension target):
class ShareViewController: SLComposeServiceViewController {
override func isContentValid() -> Bool {
return contentText.count > 0 // Validate before enabling Post button
}
override func didSelectPost() {
// Access shared items
guard let item = extensionContext?.inputItems.first as? NSExtensionItem,
let provider = item.attachments?.first else {
extensionContext?.completeRequest(returningItems: [], completionHandler: nil)
return
}
if provider.hasItemConformingToTypeIdentifier("public.url") {
provider.loadItem(forTypeIdentifier: "public.url") { [weak self] url, _ in
// Handle URL
self?.extensionContext?.completeRequest(returningItems: [], completionHandler: nil)
}
}
}
override func configurationItems() -> [Any]! {
return [] // Return SLComposeSheetConfigurationItem array for optional UI
}
}
INFO.PLIST KEYS (in extension's Info.plist via XcodeGen):
NSExtensionPrincipalClass: $(PRODUCT_MODULE_NAME).ShareViewController
NSExtensionActivationRule:
NSExtensionActivationSupportsWebURLWithMaxCount: 1
NSExtensionActivationSupportsText: true
APP GROUP: Use AppGroup entitlement to share data between main app and extension.
