我嘗試反轉 sring，似乎在這種情況下我取得了一些成功：
let sampleSentence = "I like to learn Swift"
func reverseWordsInSentence(sentence: String) -> String {
var sentence = sentence
sentence.enumerateSubstrings(in: sentence.startIndex..., options: .byWords) { _, range, _, _ in
sentence.replaceSubrange(range, with: sentence[range].reversed())
}
return sentence
}
但我試圖更進一步并確保行的反向不會影響數字，例如：
let sampleSentence = "Test 1, I like to learn Swift 24/7"
現在我有結果：
print(reverseWordsInSentence(sentence: sampleSentence)) // 1tseT, I ekil ot nrael tfiwS 42/7
我的目標是取得成果：
print(reverseWordsInSentence(sentence: sampleSentence)) // tseT1, I ekil ot nrael tfiwS 24/7
我會很高興得到任何提示！
uj5u.com熱心網友回復：
您可以在閉包內添加一個檢查，如果子字串包含所有數字，則回傳
guard let string = string, !string.allSatisfy(\.isNumber) else {
return
}
完整代碼
func reverseWordsInSentence(sentence: String) -> String {
var sentence = sentence
sentence.enumerateSubstrings(in: sentence.startIndex..., options: .byWords) { string, range, _, _ in
guard let string = string, !string.allSatisfy(\.isNumber) else {
return
}
sentence.replaceSubrange(range, with: sentence[range].reversed())
}
return sentence
}
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