A type that provides the collection’s iteration interface and encapsulates its iteration state.
SDK
Framework
@frozen struct Iterator
By default, a collection conforms to the Sequence protocol by supplying Indexing as its associated Iterator type.
typealias String.Iterator.Element The type of element traversed by the iterator.
func next() -> Character?Advances to the next element and returns it, or nil if no next element exists.
struct SubstringA slice of a string.
protocol StringProtocol A type that can represent a string as a collection of characters.
struct String.Index A position of a character or code unit in a string.
struct String.UnicodeScalarView A view of a string’s contents as a collection of Unicode scalar values.
struct String.UTF16View A view of a string’s contents as a collection of UTF-16 code units.
struct String.UTF8View A view of a string’s contents as a collection of UTF-8 code units.