A SwiftUI view modifier to present a sheet using a given item as a data source, where the sheet's content is passed a Binding to that item.

SheetBinding.swift

import SwiftUI

struct SheetBinding<Item: Identifiable, SheetContent: View>: ViewModifier {
	
	@Binding var item: Item?

	let onDismiss: (() -> Void)?
	@ViewBuilder let sheetContent: (Binding<Item>) -> SheetContent

	@ViewBuilder func body(content: Content) -> some View {
		content
			.sheet(item: self.$item, onDismiss: self.onDismiss) { newItem in
				self.sheetContent(Binding {
					newItem
				} set: {
					self.item = $0
				}) // sheetContent
			} // .sheet
	} // body
} // SheetBinding


extension View {
	/// Presents a sheet using the given item as a data source for the sheet’s content.
	///
	/// This differs from other sheet implementations with a custom `Binding<Item?>` in that the content closure accepts a `Binding<Item>`, as opposed to an `Item`.  This allows you to inject your `Binding<Item>` into your sheet's content.
	@ViewBuilder func sheet<Item, Content>(item: Binding<Item?>, onDimiss: (() -> Void)? = nil, @ViewBuilder content: @escaping (Binding<Item>) -> Content) -> some View where Item: Identifiable, Content: View {
		self.modifier(SheetBinding(item: item, onDismiss: onDimiss, sheetContent: content))
	} // View.sheet(item:onDimiss:content:)
} // extension View