ios文件操作之目录操作-NSFileManager

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////  ViewController.swift//  NSFileManager_Test////  Created by power on 16/6/1.//  Copyright © 2016年 power. All rights reserved.//import UIKitclass ViewController: UIViewController{    //延迟加载，每次调用时，返回NSSearchPathForDirectoriesInDomains数组的第一个值，也就是目录位置    lazy var documentsPath:String = {        let paths =NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask,true)        return paths.first!    }()            overridefunc viewDidLoad() {        super.viewDidLoad()        // Do any additional setup after loading the view, typically from a nib.        directoryTest()            //目录测试函数        fileTest()                 //文件测试函数    }    func directoryTest()    {        let path ="\(documentsPath)/Data"        print(path)                if !directoryExistsAtPath(path)        {            createDirectoryAtPath(path)                    }//        deleteDirectoryAtPath(path)//        directoryExistsAtPath(path)    }    //判断目录是否存在，返回布尔值    func directoryExistsAtPath(path:String) ->Bool {        let fileManager =NSFileManager.defaultManager()        let result = fileManager.fileExistsAtPath(path)                //系统判断目录或者文件是否存在，都用的是fileExistsAtPath()方法                if result        {            print("dirctory exists...")        }        else        {            print("dirctory not exists...")        }        return result    }            //创建目录，参数为穿件目录    func createDirectoryAtPath(path:String)    {        let fileManager =NSFileManager.defaultManager()        do        {            try fileManager.createDirectoryAtPath(path, withIntermediateDirectories:false, attributes: nil)        }catch         //如果创建失败，则打印一行报告        {            print("create directory failed")        }    }        //删除目录方法，参数为传入路径    func deleteDirectoryAtPath(path:String)    {        let fileManager =NSFileManager.defaultManager()        do        {            try fileManager.removeItemAtPath(path)        }        catch        {            print("delete directory failed")        }    }        func fileTest()    {        let path ="\(documentsPath)/data.txt"        print(path)                if !fileExistsAtPath(path)        {            createFileAtPath(path)            fileExistsAtPath(path)        }    }        func fileExistsAtPath(path:String) ->Bool    {        let fileManager =NSFileManager.defaultManager()        let result = fileManager.fileExistsAtPath(path)                if result        {            print("file exists")        }        else        {        print("file net exists")        }        return result    }        func createFileAtPath(path:String)    {        let fileManager =NSFileManager.defaultManager()        fileManager.createFileAtPath(path, contents:nil, attributes: nil)    }        func deleteFileAtPath(path:String)    {        let fileManager =NSFileManager.defaultManager()        do        {            try fileManager.removeItemAtPath(path)        }        catch        {            print("delete File failed")        }    }    overridefunc didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }}
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