使用 Swift 替换文件系统中的文件夹

Question

如何在 OS X 上使用 Swift 复制和粘贴文件夹的全部内容？如果 destinationPath 已包含该文件夹，则应替换它。

我试过了

let appSupportSourceURL = NSURL(string: appSupportSourcePath)
        let appSupportDestinationURL = NSURL(string: appSupportDestinationPath+"/"+appSupportFileName)
        if (fileManager.isReadableFileAtPath(appSupportSourcePath)){
            do {
            try fileManager.copyItemAtURL(appSupportSourceURL!, toURL: appSupportDestinationURL!)}
            catch{   
            }
        }

但我意识到，这仅适用于文件。我正在尝试替换整个文件夹。

Answer 1

我知道Apple鼓励新代码使用URL来指定文件系统路径。但是NSFileManager是一个旧类，它仍处于基于字符串的旧路径和基于 URL 的新范例之间的过渡。试试这个：

let appSupportSourcePath = "..."
let appSupportDestinationPath = "..."
let fileManager = NSFileManager.defaultManager()
do {
    // Delete if already exists
    if fileManager.fileExistsAtPath(appSupportDestinationPath) {
        try fileManager.removeItemAtPath(appSupportDestinationPath)
    }
    try fileManager.copyItemAtPath(appSupportSourcePath, toPath: appSupportDestinationPath)
} catch {
    print(error)
}

---

编辑：带有NSURL的方法

let appSupportSourceURL = NSURL(fileURLWithPath: "...", isDirectory: true)
let appSupportDestionURL = NSURL(fileURLWithPath: "...", isDirectory: true)
try! NSFileManager.defaultManager().copyItemAtURL(appSupportSourceURL, toURL: appSupportDestionURL)