files

//
//  ViewController.swift
//  MyFiles
//
//  Created by Hackeru_Student on 5/24/18.
//  Copyright © 2018 Hackeru_Student. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    //outlets
    @IBOutlet weak var txt: UITextField!
    @IBOutlet weak var data: UITextView!
    //variables
    //for creating a string for file name location
    var documentPath, fileName, fullPath: String!
    //for getting the ios defualt file manager
    var fileManager = FileManager.default

    override func viewDidLoad() {
        super.viewDidLoad()
        fileSettings()
    }

    //actions
    @IBAction func btnWrite(_ sender: Any) {
        if txt.text!.isEmpty {return}
        //writeToFile(txt: readFromFile()+txt.text!+"\r")
        writeToFile(readFromFile()+txt.text!+"\r")
        data.text! = readFromFile()
        txt.text=""
    }

    @IBAction func btnRead(_ sender: Any) {
        data.text! = readFromFile()
    }

    @IBAction func btnDelete(_ sender: Any) {
        do
        {
            try fileManager.removeItem(atPath: fullPath)
            data.text! = ""
        }
        catch
        {
            print ("can not delete file")
        }
    }

    //methods
    fileprivate func fileSettings()
    {
        fileName = "husam.txt"
        documentPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)[0]
        fullPath=documentPath+"/"+fileName
        print (fullPath!)
        data.text!=""
    }

    fileprivate func writeToFile (_ txt:String)
    {
        do
        {
            try txt.write(toFile: fullPath, atomically: true, encoding: String.Encoding.utf8)
        }
        catch
        {
            print ("can not write to file!!!!")
        }
    }

    fileprivate func readFromFile()->String
    {
        var temp=""
        if fileManager.fileExists(atPath: fullPath)
        {
            do{
                try temp = String(contentsOfFile: fullPath)
            }
            catch{
                print ("can not open file for read")
            }
        }
        return temp
    }

}