I found this code for taking a snapshot of a view in SwiftUI, and also found this gist for how to bring up UIActivityController in SwiftUI. It works ok but the biggest issue I am having is when you tap share the UIActivityController is blank, if you tap share again it will work as expected but I can't figure out why it doesn't work the first time? If I change to a static image or text to share it works as expected? Any thoughts?
import SwiftUI
//construct enum to decide which sheet to present:
enum ActiveSheet: String, Identifiable { // <--- note that it's now Identifiable
case photoLibrary, shareSheet
var id: String {
return self.rawValue
}
}
struct ShareHomeView: View {
@State private var shareCardAsImage: UIImage? = nil
@State var activeSheet: ActiveSheet? = nil // <--- now an optional property
var shareCard: some View {
ZStack {
VStack {
Spacer()
LinearGradient(
gradient: Gradient(colors: [.black, .red]),
startPoint: .topLeading,
endPoint: .bottomTrailing
)
.cornerRadius(10.0)
.padding(.horizontal)
Spacer()
}
SubView()
.padding(.horizontal)
VStack {
HStack {
HStack(alignment: .center) {
Image(systemName: "gamecontroller")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(height: 40)
.padding(.leading)
VStack(alignment: .leading, spacing: 3) {
Text("My App")
.foregroundColor(.white)
.font(.headline)
.fontWeight(.bold)
Text("Wed 30 Mar 22")
.foregroundColor(.white)
.font(.headline)
// .fontWeight(.bold)
}
}
Spacer()
}
.padding([.leading, .top])
Spacer()
}
} //End of ZStack
.frame(height: 350)
}
var body: some View {
NavigationView {
VStack {
HStack {
Spacer()
Button {
self.activeSheet = .photoLibrary
} label: {
Image(systemName: "photo")
.resizable()
.scaledToFit()
.frame(height: 40)
}
.padding(.trailing)
}
//GeometryReader { geometry in
shareCard
// } //End of GeometryReader
Button(action: {
shareCardAsImage = shareCard.asImage()
self.activeSheet = .shareSheet
}) {
HStack {
Image(systemName: "square.and.arrow.up")
.font(.system(size: 20))
Text("Share")
.font(.headline)
}
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 50, maxHeight: 50)
.background(Color.blue)
.foregroundColor(.white)
.cornerRadius(20)
}
.padding(.horizontal)
} //End of Master VStack
//sheet choosing view to display based on selected enum value:
.sheet(item: $activeSheet) { sheet in // <--- sheet is of type ActiveSheet and lets you present the appropriate sheet based on which is active
switch sheet {
case .photoLibrary:
Text("TODO")
case .shareSheet:
if let unwrappedImage = shareCardAsImage {
ShareSheet(photo: unwrappedImage)
}
}
}
//Needed to Wrap in a Navigation View and hide title so that dark mode would work, otherwise this sheet was always in the iPhone's light or dark mode
.navigationBarHidden(true)
.navigationTitle("")
}
}
}
struct RecoveryShareHomeView_Previews: PreviewProvider {
static var previews: some View {
ShareHomeView().preferredColorScheme(.dark)
ShareHomeView().preferredColorScheme(.light)
}
}
extension View {
func asImage() -> UIImage {
let controller = UIHostingController(rootView: self)
// locate far out of screen
controller.view.frame = CGRect(x: 0, y: CGFloat(Int.max), width: 1, height: 1)
UIApplication.shared.windows.first!.rootViewController?.view.addSubview(controller.view)
let size = controller.sizeThatFits(in: UIScreen.main.bounds.size)
controller.view.bounds = CGRect(origin: .zero, size: size)
controller.view.sizeToFit()
let image = controller.view.asImage()
controller.view.removeFromSuperview()
return image
}
}
extension UIView {
func asImage() -> UIImage {
let renderer = UIGraphicsImageRenderer(bounds: bounds)
return renderer.image { rendererContext in
// [!!] Uncomment to clip resulting image
// rendererContext.cgContext.addPath(
// UIBezierPath(roundedRect: bounds, cornerRadius: 20).cgPath)
// rendererContext.cgContext.clip()
// As commented by @MaxIsom below in some cases might be needed
// to make this asynchronously, so uncomment below DispatchQueue
// if you'd same met crash
// DispatchQueue.main.async {
layer.render(in: rendererContext.cgContext)
// }
}
}
}
import LinkPresentation
//This code is from https://gist.github.com/tsuzukihashi/d08fce005a8d892741f4cf965533bd56
struct ShareSheet: UIViewControllerRepresentable {
let photo: UIImage
func makeUIViewController(context: Context) -> UIActivityViewController {
//let text = ""
//let itemSource = ShareActivityItemSource(shareText: text, shareImage: photo)
let activityItems: [Any] = [photo]
let controller = UIActivityViewController(
activityItems: activityItems,
applicationActivities: nil)
return controller
}
func updateUIViewController(_ vc: UIActivityViewController, context: Context) {
}
}
struct SubView: View {
var body: some View {
HStack {
Image(systemName: "star")
Text("Test View")
Image(systemName: "star")
}
}
}
