복수형과 Stringsdict

복수형 문제

// FRAGILE — only works for English
let n = 5
let bad = "\(n) item" + (n == 1 ? "" : "s")
print(bad)

복수형 범주

// English uses: one, other
// Russian uses: one, few, many, other
// Japanese uses: other (only)
// You provide a variant string per category needed.

문자열 카탈로그의 복수형 변형

// Catalog entry, key "message_count":
//   one:   "You have %lld message"
//   other: "You have %lld messages"
let count = 1
let text = String(localized: "You have \(count) messages")
print(text)

기존 .stringsdict

// Localizable.stringsdict (plist) structure:
// key: "items_count"
//   NSStringLocalizedFormatKey: "%#@items@"
//   items: NSStringPluralRuleType
//     one:   "%lld item"
//     other: "%lld items"

stringsdict 항목의 구조

// The %#@items@ token expands to the chosen
// plural variant. %lld is the integer placeholder
// substituted inside each variant string.
let n = 3
print(String(localized: "\(n) items selected"))

복수형 문자열 조회

func messagesLabel(_ count: Int) -> String {
    return String(localized: "You have \(count) messages")
}
print(messagesLabel(0))
print(messagesLabel(1))
print(messagesLabel(7))

‘하나’는 단순히 1이 아닙니다

// Russian: 1, 21, 31 -> 'one'
//          2, 3, 4    -> 'few'
//          5..20, 0   -> 'many'
// Never assume one == 1.

복수형과 다른 값 결합하기

let files = 2
let folder = "Photos"
let text = String(
    localized: "\(files) files in \(folder)")
// 'files' drives the plural; 'folder' is substituted as-is
print(text)

너비 및 기기 변형

// Catalog can vary by:
//   plural: one / other
//   device: iPhone / iPad / watch
//   width:  short / medium / long
let label = String(localized: "Notifications")
print(label)

복수형화 테스트

let samples = [0, 1, 2, 5, 11, 21, 100]
for n in samples {
    print(String(localized: "\(n) items"))
}

모범 사례

func cartSummary(_ items: Int) -> String {
    String(localized: "Your cart has \(items) items",
           comment: "Cart count; pluralized")
}
print(cartSummary(1))

빠른 확인

요약