Swift delete row tableView

We will delete a tableview row entirely, when reopen, it not appear again.

We already have array fru that we read to file ghi.txt.

Copy to above last close bracket.

func doc()->Int{

let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] asNSString

let path = documentsPath.stringByAppendingPathComponent("ghi.txt")

var read : String = ""

var t=0

do {

try read = NSString(contentsOfFile: path, encoding: NSUTF8StringEncoding) asString

            t = read.characters.count

        }

catchlet error asNSError {

// print("ERROR : reading from file \(fileName) : \(error.localizedDescription)")

        }

return t

    }

func doc2()->[String]{

let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] asNSString

let path = documentsPath.stringByAppendingPathComponent("ghi.txt")

var read2 : String = ""

var q=[String]()

do {

try read2 = NSString(contentsOfFile: path, encoding: NSUTF8StringEncoding) asString

var ar = read2.componentsSeparatedByString("\n")

let c=ar.count

  ar.removeAtIndex(c-1)

var qu = [String](count: ar.count, repeatedValue: " ")

for i in0..<ar.count {

                qu[i]=ar[i]

            }

                q=qu

        }

catchlet error asNSError {

// print("ERROR : reading from file \(fileName) : \(error.localizedDescription)")

        }

return q

    }

func rite(content: String, _ fileName: String) {

let contentToAppend = content+"\n"

let filePath = NSHomeDirectory() + "/Documents/" + fileName

//Check if file exists

iflet fileHandle = NSFileHandle(forWritingAtPath: filePath) {

//Append to file

            fileHandle.seekToEndOfFile()

            fileHandle.writeData(contentToAppend.dataUsingEncoding(NSUTF8StringEncoding)!)

        }

else {

//Create new file

do {

try contentToAppend.writeToFile(filePath, atomically: true, encoding: NSUTF8StringEncoding)

            } catch {

print("Error creating \(filePath)")

            }

        }

    }

func rite2(content: String,_ fileName: String) {

let contentToAppend = content

let filePath = NSHomeDirectory() + "/Documents/" + fileName

//Check if file exists

iflet fileHandle = NSFileHandle(forWritingAtPath: filePath) {

//Append to file

//  fileHandle.seekToEndOfFile()

// fileHandle.writeData(contentToAppend.dataUsingEncoding(NSUTF8StringEncoding)!)

do {

try content.writeToFile(filePath, atomically: false, encoding: NSUTF8StringEncoding)

            } catch {

print("Error creating \(filePath)")

            }

        }

else {

//Create new file

do {

try contentToAppend.writeToFile(filePath, atomically: true, encoding: NSUTF8StringEncoding)

            } catch {

print("Error creating \(filePath)")

            }

        }

    }

Look at the line ar.removeAtIndex(c-1) in func doc2 aim to remove last blank line create by "\n".

func rite() write data line next to line.

func rite2 overwrite data in to old data .

We already have declare of tableView, arrays fru, fru2, just add to viewDidLoad.

var t=doc()

var g=""

for i in0..<fru.count {

            g=g+fru[i]+"\n"

        }

let g2=g.characters.dropLast()

let gi=String(g2)

if(t==0){

rite(gi,"ghi.txt")

        }

fru2 = doc2()

First we read file ghi.txt, if t=0 mean there 's no file, we write array data to ghi.txt. 

After that we read to new aray  fru2 = doc2().

Change array in tableView to fru2.

Copy in to delete function.

var s=""

for i in0..<self.fru2.count{

                s = s+self.fru2[i]+"\n"

            }

self.rite2("","ghi.txt")

let s2=s.characters.dropLast()

let gi=String(s2)

self.rite(gi, "ghi.txt")

We delete and write again to file ghi.txt.

Now run to see deleted row disappear when reopen.

If want to edit row we do same delete, replace old row with new row and rewrite file ghi.txt.

This is example for array name ani.

ani.removeAtIndex(dong)

ani.insert(info,atIndex:dong)

tableView.reloadData()

var s=""

for i in0..<self.ani.count{

            s = s+self.ani[i]+"\n"

        }

self.rite2("","ghi.txt")

self.rite(s, "ghi.txt")