SwiftUICore · IOS API REFERENCE

SectionCollection

struct · iOS 18.0+ · SDK 27.1

struct SectionCollection

An opaque collection representing the sections of view. Sections are constructed lazily, on demand, so access only as much of this collection as is necessary to create the resulting content. You can get access to a view's ``SectionCollection`` by using the ``Group/init(sectionsOf:transform:)`` initializer. Any content of the given view which is not explicitly specified as a section is grouped with its sibling content to form implicit sections, meaning the minimum number of sections in a `SectionCollection` is one.

Members (3)

get · iOS 18.0+

startIndex

TypeScript

get startIndex(): number

Swift declaration

var startIndex: Int { get }

The position of the first element in a nonempty collection. If the collection is empty, `startIndex` is equal to `endIndex`.

get · iOS 18.0+

endIndex

TypeScript

get endIndex(): number

Swift declaration

var endIndex: Int { get }

The collection's "past the end" position---that is, the position one greater than the last valid subscript argument. When you need a range that includes the last element of a collection, use the half-open range operator (`..<`) with `endIndex`. The `..<` operator creates a range that doesn't include the upper bound, so it's always safe to use with `endIndex`. For example: let numbers = [10, 20, 30, 40, 50] if let index = numbers.firstIndex(of: 30) { print(numbers[index ..< numbers.endIndex]) } // Prints "[30, 40, 50]" If the collection is empty, `endIndex` is equal to `startIndex`.

subscript · iOS 18.0+

subscript

TypeScript

subscript(index: number): SectionConfiguration

Swift declaration

subscript(index: Int) -> SectionConfiguration { get }

Accesses the element at the specified position. The following example accesses an element of an array through its subscript to print its value: var streets = ["Adams", "Bryant", "Channing", "Douglas", "Evarts"] print(streets[1]) // Prints "Bryant" You can subscript a collection with any valid index other than the collection's end index. The end index refers to the position one past the last element of a collection, so it doesn't correspond with an element. - Parameter position: The position of the element to access. `position` must be a valid index of the collection that is not equal to the `endIndex` property. - Complexity: O(1)

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