Swift:检查字符串是否包含字符？

Question

如何检查特定string: String内容是否包含某些内容character: Character？

Answer 1

string.characters.contains(character)

例:

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

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