Swift 3 - 如何提取正则表达式中捕获的组

Swift
import Foundation
let input = "Hello, my name is John Doe and I am 25 years old."
let pattern = "my name is (\\w+)"
let RegEx = try! NSRegularExpression(pattern: pattern, options: [])
let matches = RegEx.matches(in: input, options: [], range: NSRange(location: 0, length: input.utf16.count))
for match in matches {
    let range = match.range(at: 1)
    if let SwiftRange = Range(range, in: input) {
        let name = input[SwiftRange]
        print("Name: \(name)")
    }
}

Name: John