CoreMedia · IOS API REFERENCE

CMFormatDescription.ParameterSetCollection

struct · iOS 13.0+ · SDK 27.1

struct ParameterSetCollection

Collection of parameter sets in a video format description.

Members (3)

get · iOS 13.0+

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 13.0+

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 13.0+

subscript

TypeScript

subscript(position: number): ArrayBuffer

Swift declaration

subscript(position: Int) -> Data { 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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