---
title: "sheet(item:onDismiss:content:)"
framework: swiftui
role: symbol
role_heading: Instance Method
path: "swiftui/view/sheet(item:ondismiss:content:)"
---

# sheet(item:onDismiss:content:)

Presents a sheet using the given item as a data source for the sheet’s content.

## Declaration

```swift
nonisolated func sheet<Item, Content>(item: Binding<Item?>, onDismiss: (() -> Void)? = nil, @ContentBuilder content: @escaping (Item) -> Content) -> some View where Item : Identifiable, Content : View

```

## Parameters

- `item`: A binding to an optional source of truth for the sheet. When item is non-nil, the system passes the item’s content to the modifier’s closure. You display this content in a sheet that you create that the system displays to the user. If item changes, the system dismisses the sheet and replaces it with a new one using the same process.
- `onDismiss`: The closure to execute when dismissing the sheet.
- `content`: A closure returning the content of the sheet.

## Discussion

Discussion Use this method when you need to present a modal view with content from a custom data source. The example below shows a custom data source InventoryItem that the content closure uses to populate the display the action sheet shows to the user: struct ShowPartDetail: View {     @State private var sheetDetail: InventoryItem?

var body: some View {         Button("Show Part Details") {             sheetDetail = InventoryItem(                 id: "0123456789",                 partNumber: "Z-1234A",                 quantity: 100,                 name: "Widget")         }         .sheet(item: $sheetDetail,                onDismiss: didDismiss) { detail in             VStack(alignment: .leading, spacing: 20) {                 Text("Part Number: \(detail.partNumber)")                 Text("Name: \(detail.name)")                 Text("Quantity On-Hand: \(detail.quantity)")             }             .onTapGesture {                 sheetDetail = nil             }         }     }

func didDismiss() {         // Handle the dismissing action.     } }

struct InventoryItem: Identifiable {     var id: String     let partNumber: String     let quantity: Int     let name: String }

In vertically compact environments, such as iPhone in landscape orientation, a sheet presentation automatically adapts to appear as a full-screen cover. Use the presentationCompactAdaptation(_:) or presentationCompactAdaptation(horizontal:vertical:) modifier to override this behavior. Breakthrough effect In visionOS, most system presentations appear with a breakthrough effect by default. To change how the enclosing presentation breaks through content occluding it, use presentationBreakthroughEffect(_:), like in the following example: .sheet(item: $sheetDetail,        onDismiss: didDismiss) { detail in     VStack(alignment: .leading, spacing: 20) {         Text("Part Number: \(detail.partNumber)")         Text("Name: \(detail.name)")         Text("Quantity On-Hand: \(detail.quantity)")     }     .presentationBreakthroughEffect(.prominent)     .onTapGesture {         sheetDetail = nil     } } note: Passing a .none value for a sheet has no effect.

## See Also

### Showing a sheet, cover, or popover

- [sheet(isPresented:onDismiss:content:)](swiftui/view/sheet(ispresented:ondismiss:content:).md)
- [fullScreenCover(isPresented:onDismiss:content:)](swiftui/view/fullscreencover(ispresented:ondismiss:content:).md)
- [fullScreenCover(item:onDismiss:content:)](swiftui/view/fullscreencover(item:ondismiss:content:).md)
- [popover(item:attachmentAnchor:arrowEdge:content:)](swiftui/view/popover(item:attachmentanchor:arrowedge:content:).md)
- [popover(isPresented:attachmentAnchor:arrowEdge:content:)](swiftui/view/popover(ispresented:attachmentanchor:arrowedge:content:).md)
- [PopoverAttachmentAnchor](swiftui/popoverattachmentanchor.md)