我正在使用此代码在字符串中插入连字符以更好地换行。使用Swift 5,我得到的信息
String.UTF16View.Index(encodedOffset:l)
将不推荐使用。但是我找不到正确的参数。有什么想法吗?
import Foundation
extension String {
func hyphenated(languageCode: String) -> String {
let locale = Locale(identifier: languageCode)
return self.hyphenated(locale: locale)
}
func hyphenated(locale: Locale) -> String {
guard CFStringIsHyphenationAvailableForLocale(locale as CFLocale) else { return self }
var s = self
let fullRange = CFRangeMake(0, s.utf16.count)
var hyphenationLocations = [CFIndex]()
for (i, _) in s.utf16.enumerated() {
let location: CFIndex = CFStringGetHyphenationLocationBeforeIndex(s as CFString, i, fullRange, 0, locale as CFLocale, nil)
if hyphenationLocations.last != location {
hyphenationLocations.append(location)
}
}
for l in hyphenationLocations.reversed() {
guard l > 0 else { continue }
let strIndex = String.UTF16View.Index(encodedOffset: l)
// insert soft hyphen:
s.insert("\u{00AD}", at: strIndex)
// or insert a regular hyphen to debug:
// s.insert("-", at: strIndex)
}
return s
}
}
答案 0 :(得分:3)
l
是字符串s
中以UTF-16代码为单位的偏移量,因此您可以替换
let strIndex = String.UTF16View.Index(encodedOffset: l)
作者
let strIndex = s.utf16.index(s.utf16.startIndex, offsetBy: l)
或使用
let strIndex = String.Index(utf16Offset: l, in: s)
它是由Swift 5中的SE-0241 Deprecate String Index Encoded Offsets引入的。