此處只列出了常用的一些功能

//
//  LKFileManger.swift
// 
//
//  Created by admin on 2017/5/22.
//  Copyright ? 2017年 LK. All rights reserved.
//

import UIKit

class LKFileManger: NSObject {

    /// 單利
    static let sharedInstance: LKFileManger = LKFileManger()

    ///
    /// 獲取Documents路徑
    ///
    /// - Returns: 返回路徑
    public func getDocumentsPath() -> String{

        let paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)

        let path = paths.first

        print(path!)

        return path!
    }

    /// 根據(jù)傳入的文件夾名創(chuàng)建文件夾??
    ///
    /// - Parameter directoryName: 傳入的文件夾名
    public func createDirectory(_ directoryName: String) {

        /// 獲取路徑
        let path = LKFileManger.sharedInstance.getDocumentsPath()

        /// 創(chuàng)建文件管理者
        let fileManger = FileManager.default

        /// 創(chuàng)建文件夾
        let directoryPath = path + ("/\(directoryName)")

        do {
            try fileManger.createDirectory(atPath: directoryPath, withIntermediateDirectories: true, attributes: nil)
            print("文件夾創(chuàng)建成功")
        } catch let error  {
            print(error.localizedDescription)
            print("文件夾創(chuàng)建失敗")
        }
    }

    /// 根據(jù)傳入的文件名創(chuàng)建文件
    ///
    /// - Parameter fileName: 傳入的文件名
    /// - Returns: 返回文件名
    public func createFile(_ fileName: String) -> (String){

        /// 獲取路徑
        let path = LKFileManger.sharedInstance.getDocumentsPath()

        /// 創(chuàng)建文件管理者
        let fileManger = FileManager.default

        /// 創(chuàng)建文件
        let filePath = path + ("/\(fileName)")

        if !fileManger.fileExists(atPath: filePath) { /// 先判斷是否存在  不存在再創(chuàng)建

            let isSuccess = fileManger.createFile(atPath: filePath, contents: nil, attributes: nil)

            if isSuccess {
                print("文件創(chuàng)建成功")
            }else {
                print("文件創(chuàng)建失敗")
            }
        }

        return filePath
    }

    /// 寫(xiě)入文件
    ///
    /// - Parameters:
    ///   - data: 要寫(xiě)入的數(shù)據(jù)
    ///   - filePath: 要寫(xiě)入的文件路徑
    /// - Returns: 是否寫(xiě)入成功
    public func writeFile(_ data: AnyObject,  _ filePath: String) -> Bool {

        return  data.write(toFile: filePath, atomically: true)
    }

    /// 讀取文件內(nèi)容
    ///
    /// - Parameter filePath: 要讀取的文件路徑
    /// - Returns: 返回文件中數(shù)據(jù)
    public func readFileContent(_ filePath: String) -> AnyObject {

        /// 因?yàn)槲业捻?xiàng)目是存的數(shù)組 所以我返回的數(shù)組
        return NSArray(contentsOfFile: filePath) ?? []
    }



    /// 獲取文件的大小
    ///
    /// - Returns: 文件大小
    public func getFileSize(_ fileName: String) -> Double {

        let fileManger = FileManager.default

        guard fileManger.fileExists(atPath: fileName) else {
            return 0
        }

        let attr = try! fileManger.attributesOfItem(atPath: fileName)

        let fileSize = Double((attr as NSDictionary).fileSize())

        return fileSize/1024/1024
    }

}