Xcode9学习笔记71 - 复制、移动和删除文

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        self.copyFile()
        self.moveFile()
        self.removeFile()
        self.removeFolder()
        self.listFolder()
    }
    
    func copyFile() {
        //获得文件管理对象，它的主要功能包括：读取文件中的数据、向一个文件中写入数据、删除或复制文件、移动文件、比较另个文件的内容等
        let fileManager = FileManager.default
        let sourceUrl = NSHomeDirectory() + "/Documents/swift.txt"
        let targetUrl = NSHomeDirectory() + "/Documents/swift_bak.txt"//表示文件被复制后的目标位置
        do {//创建一个异常捕捉语句，用于复制一个文件
            try fileManager.copyItem(atPath: sourceUrl, toPath: targetUrl)
            print("Success to copy file.")
        } catch {
            print("Failed to copy file.")
        }
    }
    
    func moveFile() {
        //获得文件管理对象，它的主要功能包括：读取文件中的数据、向一个文件中写入数据、删除或复制文件、移动文件、比较另个文件的内容等
        let fileManager = FileManager.default
        let sourceUrl = NSHomeDirectory() + "/Documents/products.plist"
        let targetUrl = NSHomeDirectory() + "/Documents/backUp"//表示文件被移动后的目标位置
        do {
            try fileManager.moveItem(atPath: sourceUrl, toPath: targetUrl)
            print("Success to move file.")
        } catch {
            print("Failed to move file.")
        }
    }
    
    func removeFile() {
        let fileManager = FileManager.default
        let sourceUrl = NSHomeDirectory() + "/Documents/Pic.png"
        do {
            try fileManager.removeItem(atPath: sourceUrl)
            print("Success to remove file.")
        } catch {
            print("Failed to remove file.")
        }
    }
    
    func removeFolder() {
        let fileManager = FileManager.default
        let folder = NSHomeDirectory() + "/Documents/bak"
        let files:[AnyObject]? = fileManager.subpaths(atPath: folder) as [AnyObject]?
        for file in files! {//遍历
            do {
                try fileManager.removeItem(atPath: folder + "/\(file)")
                print("Success to remove folder")
            } catch {
                print("Failed to remove folder")
            }
        }
    }
    
    func listFolder() {
        let manager = FileManager.default
        let url = NSHomeDirectory() + "/Documents/"//文档目录
        let contents = manager.enumerator(atPath: url)
        print("contents:\(String(describing: contents?.allObjects))")
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}