A requested number of items, sent to a publisher from a subscriber through the subscription.
Members (5)
get · iOS 13.0+
description
TypeScript
get description(): string
Swift declaration
var description: String { get }
A textual representation of this instance.
Calling this property directly is discouraged. Instead, convert an
instance of any type to a string by using the `String(describing:)`
initializer. This initializer works with any type, and uses the custom
`description` property for types that conform to
`CustomStringConvertible`:
struct Point: CustomStringConvertible {
let x: Int, y: Int
var description: String {
return "(\(x), \(y))"
}
}
let p = Point(x: 21, y: 30)
let s = String(describing: p)
print(s)
// Prints "(21, 30)"
The conversion of `p` to a string in the assignment to `s` uses the
`Point` type's `description` property.
get · iOS 13.0+
max
TypeScript
get max(): (number) | null
Swift declaration
var max: Int? { get }
The number of requested values.
The value is `nil` if the demand is ``Subscribers/Demand/unlimited``.
Creates a demand for the given maximum number of elements.
The publisher is free to send fewer than the requested maximum number of elements.
- Parameter value: The maximum number of elements. Providing a negative value for this parameter results in a fatal error.
get · iOS 13.0+
none
TypeScript
static get none(): Subscribers_Demand
Swift declaration
static let none: Subscribers.Demand
A request for no elements from the publisher.
This is equivalent to `Demand.max(0)`.
get · iOS 13.0+
unlimited
TypeScript
static get unlimited(): Subscribers_Demand
Swift declaration
static let unlimited: Subscribers.Demand
A request for as many values as the publisher can produce.
