---
title: ForEach
framework: swiftui
role: symbol
role_heading: Structure
path: swiftui/foreach
---

# ForEach

A structure that computes views on demand from an underlying collection of identified data.

## Declaration

```swift
struct ForEach<Data, ID, Content> where Data : RandomAccessCollection, ID : Hashable
```

## Mentioned in

Creating performant scrollable stacks Displaying data in lists Grouping data with lazy stack views Reordering items in lists, stacks, grids, and custom layouts Picking container views for your content

## Overview

Overview Use ForEach to provide views based on a RandomAccessCollection of some data type. Either the collection’s elements must conform to Identifiable or you need to provide an id parameter to the ForEach initializer. The following example creates a NamedFont type that conforms to Identifiable, and an array of this type called namedFonts. A ForEach instance iterates over the array, producing new Text instances that display examples of each SwiftUI Font style provided in the array. private struct NamedFont: Identifiable {     let name: String     let font: Font     var id: String { name } }

private let namedFonts: [NamedFont] = [     NamedFont(name: "Large Title", font: .largeTitle),     NamedFont(name: "Title", font: .title),     NamedFont(name: "Headline", font: .headline),     NamedFont(name: "Body", font: .body),     NamedFont(name: "Caption", font: .caption) ]

var body: some View {     ForEach(namedFonts) { namedFont in         Text(namedFont.name)             .font(namedFont.font)     } }

Some containers like List or LazyVStack will query the elements within a for each lazily. To obtain maximal performance, ensure that the view created from each element in the collection represents a constant number of views. For example, the following view uses an if statement which means each element of the collection can represent either 1 or 0 views, a non-constant number. ForEach(namedFonts) { namedFont in     if namedFont.name.count != 2 {         Text(namedFont.name)     } } You can make the above view represent a constant number of views by wrapping the condition in a VStack, an HStack, or a ZStack. ForEach(namedFonts) { namedFont in     VStack {         if namedFont.name.count != 2 {             Text(namedFont.name)         }     } } When enabling the following launch argument, SwiftUI will log when it encounters a view that produces a non-constant number of views in these containers: -LogForEachSlowPath YES

## Topics

### Creating a collection

- [init(_:)](swiftui/foreach/init(_:).md)
- [init(_:content:)](swiftui/foreach/init(_:content:).md)
- [init(_:id:content:)](swiftui/foreach/init(_:id:content:).md)
- [init(sections:content:)](swiftui/foreach/init(sections:content:).md)
- [init(subviews:content:)](swiftui/foreach/init(subviews:content:).md)

### Creating an editable collection

- [init(_:editActions:content:)](swiftui/foreach/init(_:editactions:content:).md)
- [init(_:id:editActions:content:)](swiftui/foreach/init(_:id:editactions:content:).md)

### Accessing content

- [content](swiftui/foreach/content.md)
- [data](swiftui/foreach/data.md)

## Relationships

### Conforms To

- [AccessibilityRotorContent](swiftui/accessibilityrotorcontent.md)
- [AttachmentContent](realitykit/attachmentcontent.md)
- [Chart3DContent](charts/chart3dcontent.md)
- [ChartContent](charts/chartcontent.md)
- [Copyable](swift/copyable.md)
- [CustomizableToolbarContent](swiftui/customizabletoolbarcontent.md)
- [DynamicMapContent](mapkit/dynamicmapcontent.md)
- [DynamicTableRowContent](swiftui/dynamictablerowcontent.md)
- [DynamicViewContent](swiftui/dynamicviewcontent.md)
- [Escapable](swift/escapable.md)
- [MapContent](mapkit/mapcontent.md)
- [TabContent](swiftui/tabcontent.md)
- [TableRowContent](swiftui/tablerowcontent.md)
- [ToolbarContent](swiftui/toolbarcontent.md)
- [View](swiftui/view.md)

## See Also

### Iterating over dynamic data

- [ForEachSectionCollection](swiftui/foreachsectioncollection.md)
- [ForEachSubviewCollection](swiftui/foreachsubviewcollection.md)
- [DynamicViewContent](swiftui/dynamicviewcontent.md)