Mastering  share sheet preview

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.BTUFSJOH TIBSFTIFFUQSFWJFX QPUBUPUJQT F[VSB

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F[VSB w 1PEDBTU"VEJPCPPL IUUQTNPPLNPPLSBEJPDPN w -*/&DPSQ w -*/&ϊϕϧ։ൃ୲౰

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/FX J04d dJ04

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2͜ͷ1SFWJFX෦෼ɺԿ͔ରԠ͕ඞཁʁ

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2͜ͷ1SFWJFX෦෼ɺԿ͔ରԠ͕ඞཁʁ 4%,ଆͰద੾ʹදࣔͯ͘͠ΕΔ৔߹΋͋Δ

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2͜ͷ1SFWJFX෦෼ɺԿ͔ରԠ͕ඞཁʁ ΞϓϦ։ൃऀଆͰมߋ͕ඞཁͳ৔߹΋͋Δ

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ରԠલ γΣΞ͢Δίϯςϯπ w 63-ίϯςϯπ΁ͷ63- w ςΩετϋογϡλά౳

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ରԠલ ରԠޙ63-ͷQSFWJFXΛදࣔ

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ରԠޙ63-ͷQSFWJFXΛදࣔ ରԠલ

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UIActivityViewController

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let activityVC = UIActivityViewController( activityItems: [shareItem], applicationActivities: nil) self.present(activityVC, animated: true, completion: nil)

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activityItems: [URL(Web)] activityItems: [URL(file path)] activityItems: [Text] ࣗಈతʹద੾ͳදࣔΛͯ͘͠ΕΔ৔߹ ྫ

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activityItems: [URL, Text] activityItems: [UIImage] activityItems: [NSData] activityItems: [Text, UIImage] վળͷ༨஍͕͋Δ৔߹ ྫ ΞϓϦΞΠίϯ

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ଞʹ΋͍Ζ͍Ζͳύλʔϯ͕͋Δ͚ΕͲʜ

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͜ΕΛԡ͓͚͑ͯ͞͹େৎ෉ʂ

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ϙΠϯτ 1SFWJFX͞ΕΔίϯςϯπͷ༏ઌ౓

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let activityVC = UIActivityViewController( activityItems: [...], applicationActivities: nil) self.present(activityVC, animated: true, completion: nil)

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6*"DUJWJUZ*UFN4PVSDF4USJOH63-%BUB 6**NBHF౳ ϙΠϯτ 1SFWJFX͞ΕΔίϯςϯπͷ༏ઌ౓ ஫ ͜Ε͸%PDVNFOUʹ໌จԽ͞Ε͓ͯΒͣɺ ࢲݸਓͰͷ࣮ݧΛجʹͨ͠ௐࠪ݁ՌͰ͢ɻ ެࣜ৘ใͰ͸ͳ͍͜ͱΛ͝ཹҙ͍ͩ͘͞ɻ

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activityItems: [URL, String] 6*"DUJWJUZ*UFN4PVSDF4USJOH63-*NBHF ϙΠϯτ 1SFWJFX͞ΕΔίϯςϯπͷ༏ઌ౓

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activityItems: [ItemSource(URL), String] ϙΠϯτ 1SFWJFX͞ΕΔίϯςϯπͷ༏ઌ౓ 6*"DUJWJUZ*UFN4PVSDF4USJOH63-*NBHF

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ϙΠϯτ -1-JOL.FUBEBUB

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-1-JOL.FUBEBUB An object that contains metadata about a URL https://developer.apple.com/documentation/linkpresentation/lplinkmetadata •var originalURL: URL? •var url: URL? •var title: String? •var iconProvider: NSItemProvider? •var imageProvider: NSItemProvider? •var videoProvider: NSItemProvider? •var remoteVideoURL: URL?

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class ShareActivityItemSource: NSObject, UIActivityItemSource { func activityViewControllerLinkMetadata(_ activityViewController: UIActivityViewController) -> LPLinkMetadata? { linkMetadata } func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any { placeholder } func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivity.ActivityType?) -> Any? { item } }

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class ShareActivityItemSource: NSObject, UIActivityItemSource { func activityViewControllerLinkMetadata(_ activityViewController: UIActivityViewController) -> LPLinkMetadata? { let linkMetadata = LPLinkMetadata() linkMetadata.title = "custom title" linkMetadata.iconProvider = NSItemProvider(contentsOf: imageURL) return linkMetadata } linkMetadata.iconProvider (or imageProvider) linkMetadata.title

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class ShareActivityLazyLoadItemSource: NSObject, UIActivityItemSource { init(_ url: URL) { self.originalURL = url self.imageURL = saveImageInTemporaryDir(#imageLiteral(resourceName: "ezura"), fileName: "shareImage")! super.init() linkMetadata.title = "placeholder title" linkMetadata.originalURL = originalURL linkMetadata.iconProvider = NSItemProvider(contentsOf: imageURL) linkMetadata.imageProvider = NSItemProvider(contentsOf: imageURL) metadataProvider.startFetchingMetadata(for: originalURL) { [linkMetadata] metadata, error in linkMetadata.title = metadata?.title linkMetadata.url = metadata?.url linkMetadata.originalURL = metadata?.originalURL linkMetadata.iconProvider = metadata?.iconProvider linkMetadata.imageProvider = metadata?.imageProvider } } func activityViewControllerLinkMetadata(_ activityViewController: UIActivityViewController) -> LPLinkMetadata? { return linkMetadata }

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