Instance Method インスタンスメソッド

appendInterpolation(_:formatter:)

Appends an optionally-formatted instance of an Objective-C subclass to a string interpolation.

Declaration 宣言 

mutating func appendInterpolation<Subject>(_ subject: Subject, formatter: Formatter? = nil) where Subject : NSObject

Parameters パラメータ

subject

An NSObject to append.

formatter

A formatter to convert subject to a string representation.

Discussion 議論

Don’t call this method directly; it’s used by the compiler when interpreting string interpolations.

The following example shows how to use a Measurement value and a MeasurementFormatter to create a LocalizedStringKey that uses the formatter style Formatter.UnitStyle.long when generating the measurement’s string representation. Rather than calling appendInterpolation(_:formatter) directly, the code gets the formatting behavior implicitly by using the \() string interpolation syntax.


let siResistance = Measurement(value: 640, unit: UnitElectricResistance.ohms)
let formatter = MeasurementFormatter()
formatter.unitStyle = .long
let key = LocalizedStringKey ("Resistance: \(siResistance, formatter: formatter)")
let text1 = Text(key) // Text contains "Resistance: 640 ohms"

See Also 参照

Appending to an Interpolation

func appendInterpolation(String)
Appends a literal string segment to a string interpolation.
func appendInterpolation(AttributedString)
Appends an attributed string to a string interpolation.
func appendInterpolation<T>(T)
Appends a type, convertible to a string by using a default format specifier, to a string interpolation.
func appendInterpolation<T>(T, specifier: String)
Appends a type, convertible to a string with a format specifier, to a string interpolation.
func appendInterpolation(ClosedRange<Date>)
Appends a date range to a string interpolation.
func appendInterpolation(DateInterval)
Appends a date interval to a string interpolation.
func appendInterpolation<F>(F.FormatInput, format: F)
Appends the formatted representation of a nonstring type supported by a corresponding format style.
func appendInterpolation<Subject>(Subject, formatter: Formatter?)
Appends an optionally-formatted instance of a Foundation type to a string interpolation.
func appendInterpolation(Date, style: Text.DateStyle)
Appends a formatted date to a string interpolation.
func appendInterpolation(Text)
Appends the string displayed by a text view to a string interpolation.
func appendInterpolation(Image)
Appends an image to a string interpolation.
func appendLiteral(String)
Appends a literal string.
typealias StringLiteralType
The type that should be used for literal segments.