ios - swift 3.0 和 iOS : How to set the delete privileges of a file in Swift

Question

如果我尝试使用 FileManager 类删除文件，我会收到错误消息。

下面的函数返回true，这意味着我需要设置删除权限属性。然而我haven't找到了一个关于如何做的例子。

func isDeletableFile(atPath path: String) -> Bool

有什么帮助吗？

代码:

func fileManager(_ fileManager: FileManager, shouldRemoveItemAtPath path: String) -> Bool {
   // print("Should remove invoked for path \(path)")
    return true
}

func fileManager(_ fileManager: FileManager, shouldProceedAfterError error: Error, removingItemAt URL: URL) -> Bool {
    //print("Should process")
    return true
}

func deleteAllFiles(subPath : String) {
    var url = Bundle.main.bundleURL
    url = url.appendingPathComponent(subPath)

    let fileManager = FileManager.default
    fileManager.delegate = self

    if let enumerator = fileManager.enumerator(at: url, includingPropertiesForKeys: nil) {
        for file in enumerator {
            let fileAsNSURL = file as! NSURL
            print("")
            print("Deleting: \(fileAsNSURL.absoluteString!)")
            print("")

            do {
                // I would like to set the deletable permissions before checking this..
                if (fileManager.isDeletableFile(atPath: fileAsNSURL.absoluteString!)){
                    try fileManager.removeItem(atPath: fileAsNSURL.absoluteString!)
                }
                else{
                    print("its not deletable")
                }
            }
            catch let error {
                print("file-delete-error:\n\(error) for path \(fileAsNSURL.absoluteString!)")
            }
        }
    }
}

Answer 1

有一个普遍的误解:

在文件系统中，您必须在 URL 上调用 path 来获取路径

fileManager.isDeletableFile(atPath: fileAsNSURL.path)

absoluteString 返回以方案 (http://, file://) 开头的 URL 的(转义百分比)字符串表示)

---

例如你有一个 URL(不要在 Swift 3 中使用 NSURL):

let url = URL(fileURLWithPath:"/Users/myUser/Application Support")

• url.path 返回 "/Users/myUser/Application Support"
• url.absoluteString 返回 "file:///Users/myUser/Application%20Support"