在swift 2.1和Xcode 7.1.1中
我有下面的代码，当在终端中运行时，它会产生下一个输出块。

import Foundation
let oldName = "eleven"
let newName = "twelve"
let baseName = "/Users/empl1/Documents/abc/"
let ignorFile: Set = ["png", "jpg"]

let fm = NSFileManager()
let dirEnum = fm.enumeratorAtPath(baseName + oldName)
while let file = dirEnum?.nextObject() {
}

以下是我在终端中看到的内容：

FredMac:Documents empl1$ swiftc copier.swift
FredMac:Documents empl1$ swift copier
copier:1:1: error: invalid UTF-8 found in source file
?????@   ? H__PAGEZEROx__TEXT__text__TEXT?
copier:1:2: error: invalid UTF-8 found in source file
?????@   ? H__PAGEZEROx__TEXT__text__TEXT?
copier:1:3: error: invalid UTF-8 found in source file
?????@   ? H__PAGEZEROx__TEXT__text__TEXT?
copier:1:4: error: input files must be encoded as UTF-8 instead of UTF-16
?????@   ? H__PAGEZEROx__TEXT__text__TEXT?
FredMac:Documents empl1$

如何解决此问题？