ios - Permanently saving data using swift 3 -

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i made todo list app enter task in 1 view controller , saves data in array of view controller , adds table. problem when close app, new task data gone. can help?

i tried using userdefaults didn't work quite or didn't use right.

this code view controller type in new task:

@ibaction func addtaskbutton(_ sender: any) {     if (textfield.text != "") {         task.append(textfield.text!)          let task = userdefaults.standard.set(task, forkey: "xx")          textfield.text = ""         textlabel.text = "saved!"         timer = timer.scheduledtimer(timeinterval: 1.6, target: self, selector: #selector(addtaskviewcontroller.hide), userinfo: nil, repeats: true)          textlabel.ishidden = false     } }

this code view controller try save data , place in table

var task = ["pray", "code", "work-out"] var school = ["email collin college","email pqc","create file doccumensts"] var shoppinglist = ["kd9 black","roshrun black","nike huarache black","white shirt","black shirt", "black work out pnats", "white socks"] var prayer = ["school","family","drive & grace"] var workout = ["legs","caffs","push ups","arms","chest press","squats", "back"]  class add_task_tableviewcontroller: uiviewcontroller,uitableviewdelegate, uitableviewdatasource {     @iboutlet weak var tasktableview: uitableview!      public func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int     {         return (task.count)     }      public func tableview(_ tableview: uitableview, cellforrowat indexpath: indexpath) -> uitableviewcell     {         let cell = uitableviewcell(style: uitableviewcellstyle.default, reuseidentifier: "cell")         cell.textlabel?.text = task[indexpath.row]         return(cell)     }      func tableview(_ tableview: uitableview, commit editingstyle: uitableviewcelleditingstyle, forrowat indexpath: indexpath)     {         if editingstyle == uitableviewcelleditingstyle.delete         {             task.remove(at: indexpath.row)             tasktableview.reloaddata()         }     }      override func viewdidappear(_ animated: bool) {         tasktableview.reloaddata()     }

you can use sqlite database maintain draft messages or values can used later when open app again.





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