Swift：检查字符串是否包含字符？

Question

如何检查特定的 字符串：String 是否包含某个特定的 字符：Character？

- ma11hew28

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2020年我发现最简单的解决方法是：s = "hello"，然后使用s.contains("e")。 - Nicola Mingotti

Answer 1

string.contains(character)

例子：

let string = "Hello, World!"
let character: Character = "e"

if string.contains(character) {
    print("\(string) contains \(character).")
} else {
    print("\(string) doesn't contain \(character).")
}

- ma11hew28

---

Swift 5 提示："错误：'characters' 不可用，请直接使用 String"，因此您可以跳过 .characters 并直接调用 string.contains(character)。 - ggorlen

Answer 2

let char: Character = "e"

let string: String = "William"

let result = string.rangeOfString("\(char)")

if let result = result {
    //The string contains the character
    print("It contains")
}else{
    //The string doesn't contain the character
    print("It doesn't contain")
}

- William Kinaan