Created
December 1, 2019 11:37
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SwiftUI ActivityViewController Share Image
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import SwiftUI | |
struct TestPage: View { | |
@State private var rect: CGRect = .zero | |
@State private var uiImage: UIImage? = nil | |
@State private var showShareSheet = false | |
var body: some View { | |
VStack { | |
HStack { | |
Image(systemName: "sun.haze") | |
.font(.title) | |
.foregroundColor(.white) | |
Text("Hello, World!") | |
.font(.title) | |
.foregroundColor(.white) | |
} | |
.padding() | |
.background(Color.blue) | |
.cornerRadius(8) | |
.background(RectangleGetter(rect: $rect)) | |
.onAppear() { | |
} | |
Button(action: { | |
self.uiImage = UIApplication.shared.windows[0].rootViewController?.view!.getImage(rect: self.rect) | |
self.showShareSheet.toggle() | |
}) { | |
Image(systemName: "square.and.arrow.up") | |
.resizable() | |
.aspectRatio(contentMode: .fit) | |
.frame(width: 50, height: 50) | |
.padding() | |
.background(Color.pink) | |
.foregroundColor(Color.white) | |
.mask(Circle()) | |
}.sheet(isPresented: self.$showShareSheet) { | |
ShareSheet(photo: self.uiImage!) | |
}.padding() | |
} | |
} | |
} | |
struct TestPage_Previews: PreviewProvider { | |
static var previews: some View { | |
TestPage() | |
} | |
} | |
struct RectangleGetter: View { | |
@Binding var rect: CGRect | |
var body: some View { | |
GeometryReader { geometry in | |
self.createView(proxy: geometry) | |
} | |
} | |
func createView(proxy: GeometryProxy) -> some View { | |
DispatchQueue.main.async { | |
self.rect = proxy.frame(in: .global) | |
} | |
return Rectangle().fill(Color.clear) | |
} | |
} | |
extension UIView { | |
func getImage(rect: CGRect) -> UIImage { | |
let renderer = UIGraphicsImageRenderer(bounds: rect) | |
return renderer.image { rendererContext in | |
layer.render(in: rendererContext.cgContext) | |
} | |
} | |
} | |
import LinkPresentation | |
struct ShareSheet: UIViewControllerRepresentable { | |
let photo: UIImage | |
func makeUIViewController(context: Context) -> UIActivityViewController { | |
let text = "🐥" | |
let itemSource = ShareActivityItemSource(shareText: text, shareImage: photo) | |
let activityItems: [Any] = [photo, text, itemSource] | |
let controller = UIActivityViewController( | |
activityItems: activityItems, | |
applicationActivities: nil) | |
return controller | |
} | |
func updateUIViewController(_ vc: UIActivityViewController, context: Context) { | |
} | |
} | |
class ShareActivityItemSource: NSObject, UIActivityItemSource { | |
var shareText: String | |
var shareImage: UIImage | |
var linkMetaData = LPLinkMetadata() | |
init(shareText: String, shareImage: UIImage) { | |
self.shareText = shareText | |
self.shareImage = shareImage | |
linkMetaData.title = shareText | |
super.init() | |
} | |
func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any { | |
return UIImage(named: "AppIcon ") as Any | |
} | |
func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivity.ActivityType?) -> Any? { | |
return nil | |
} | |
func activityViewControllerLinkMetadata(_ activityViewController: UIActivityViewController) -> LPLinkMetadata? { | |
return linkMetaData | |
} | |
} |
Thank you for this code sample. I have been trying to make it work, but "ShareSheet(photo: self.uiImage!)" always fails. It returns "Fatal error: Unexpectedly found nil while unwrapping an Optional value", even though I have verified self.uiImage in not nil (using cgImage and ciImage). Do I need to declare the variable differently to pass into the Share Sheet? I am on iOS 15.5, but I have tried using down to 14 with same result. Any help would be appreciated. Your code snippet is the closest to what I am working towards. Thanks.
thank you! Did really help me!
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I have been failing to make a share sheet work on my SwiftUI project but thanks to you. This code worked perfectly for me.