ios - 数组值应该排序为(字母、数字和特殊字符)

Question

我尝试按如下方式对数组进行排序:

let students: Set = ["23412334","&234@fwv","Kofi", "Abena", "Peter", "Kweku", "Akosua"]
let sortedStudents = students.sorted()
print(sortedStudents)

输出:

["&234@fwv", "23412334", "Abena", "Akosua", "Kofi", "Kweku", "Peter"]

但我需要像

["Abena", "Akosua", "Kofi", "Kweku", "Peter", "23412334","&234@fwv"]

Answer 1

let words = ["23412334","&234@fwv","Kofi", "Abena", "Peter", "Kweku", "Akosua"]

func sortedNumbersLast(words: [String]) -> [String] {
    var startsWithDigit     = [String]()
    var startsWithCharacter = [String]()
    var startsWithSymbol    = [String]()


    for word in words {
        if let first = word.characters.first {
            if first >= "0" && first <= "9" {
                startsWithDigit.append(word)
            }
            else {
                if(!(first >= "a" && first <= "z") && !(first >= "A" && first <= "Z") ){
                    startsWithSymbol.append(word)
                }else{
                    startsWithCharacter.append(word)
                }

            }
        }
    }
    return startsWithCharacter.sorted(by: <) + startsWithDigit.sorted(by: <) + startsWithSymbol.sorted()
}
print(sortedNumbersLast(words: words))

[“Abena”、“Akosua”、“Kofi”、“Kweku”、“Peter”、“23412334”、“&234@fwv”]

Modified Answer