What is the difference between List and ForEach in SwiftUI?
SwiftUI List vs ForEach
List
:
- mixed content(also allows to work with collection)
- scrollable
- uses reusing cell pattern (efficient)
ForEach
:
- works only with a collection
List
+ ForEach
= super feature. In this case, for example, List
uses reusing cell pattern for every view from ForEach
. Also you are able to use onMove
, onDelete
...
ForEach
is a view that lets you pass a collection of data to its initializer and then creates multiple "subviews" from the closure you provide. It doesn't have any semantics on how the views will be arranged.Example:
ForEach(1..<5) { row in Text("Row \(row)") }
will create the equivalent off
Text("Row 1") Text("Row 2") Text("Row 3") Text("Row 4")
wrapped in a single container view.
List
is a view that can compose multiple views together, but not necessarily views of the same type. You can simply add multiple views without any loop.Example 1:
List { Image("avatar") Text("Title") Button(action: { print("Button tapped!") }) { Text("Energize!") } }
As a convenience, the
List
initializer allows you to use it just like theForEach
view in case you want to have a list consisting of a single cell type only.Example 2:
List(1..<5) { row in Text("Row \(row)") }
A list has a special appearance, depending on the platform. For example, on iOS a list will appear as a table view and insert separator lines between its vertically stacked views.
You can use
ForEach
views insideList
views to have both dynamic and static content – a very powerful feature of SwiftUI.Example 3:
List { Text("Food") ForEach(meals) { meal in Text(meal.name) } Text("Drinks") ForEach(drinks) { drink in Text(drink.name) } }