字符串的用法.范围在Swift 3.0

Question

let us = "http://example.com"
let range = us.rangeOfString("(?<=://)[^.]+(?=.com)", options:.RegularExpressionSearch)
if range != nil {
    let found = us.substringWithRange(range!)
    print("found: (found)") // found: example
}

此代码在Swift 2中提取反斜杠和。com之间的substring。我上网查了一下，发现rangeOfString变成了range()。

但是我仍然不能使代码在Swift 3.0中工作。你能帮我吗?

编辑:我使用swift 3 07-25 build.

Answer 1

在swift 3.0中 rangeOfString语法改变如下:

let us = "http://example.com"
let range = us.range(of:"(?<=://)[^.]+(?=.com)", options:.regularExpression)
if range != nil {
     let found = us.substring(with: range!)
     print("found: (found)") // found: example
}

Answer 2

在最新的swift 3.0中使用Xcode 8 Beta 6(最新的SDK更新):

let us = "http://example.com"
let range = us.range(of: "(?<=://)[^.]+(?=.com)", options: .regularExpression)
if range != nil {
    let found = us.substring(with: range!)
    print("found: (found)") // found: example
}