用更少的代码在swift中比较两个字符串

let string1 = "Hello"
let string2 = "World"

if string1 == string2 {
    print("两个字符串相等")
} else {
    print("两个字符串不相等")
}

let string1 = "Hello"
let string2 = "World"

let result = string1.compare(string2, options: .caseInsensitive)

if result == .orderedSame {
    print("两个字符串相等")
} else {
    print("两个字符串不相等")
}

let string1 = "Hello"
let string2 = "World"

if string1.isEqual(string2) {
    print("两个字符串相等")
} else {
    print("两个字符串不相等")
}