如何在swift中确定单词长度

Question

let word : String = "hello"

var wordLength : Int = word.length //what to do here ?

for i in wordLength {
    let index = word.startIndex.advancedBy(i)
    print(word[index])
}

我想单独打印变量字的所有字符，但我不知道如何确定单词何时结束，或者我必须循环直到整个单词被打印。

Answer 1

let word = "hello"

for i in word.characters {
    print(i)
}

Answer 2

Swift 3：String + Emoji

let word = "Hello :-)  "

let wordLengthInt_0 = word.characters.count
// 12 (!!!!!)

let wordLengthInt_1 = word.utf16.count
// 13

let wordLengthInt_2 = (word as NSString).length
// 13