app reverts all input variables to defaults after some time - swift

Question

I wrote my fist app, very simple, that creates a user defined number of badges at random times during a user defined window of time. It works fine but after some time (not sure how long, 2-4 hours), all of the user input information reverts to the defaults of the program. The issue is it is supposed to run each day but it is annoying to have to set it each morning. I am not sure if this is a coding issue or if the app 'reboots' when it is not doing anything in the background. Note that this occurs on my iPhone 8 but not on the simulator (or I am not patient enough for it to occur on the simulator).
I have put several print and label to try to identify when it occurs; I am sure I am putting them in the correct places. I apologize for including so much code - I tried to weed some of the mistakes out but I do not know where the problem is.
import UserNotifications
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var EarlyTimePicker: UITextField!
#IBOutlet weak var LateTimePicker: UITextField!
#IBOutlet weak var NumQuestions: UITextField!
#IBOutlet weak var myLabel_Questions: UILabel!// Attached to the label box
#IBOutlet weak var myLabel_StartEndTime: UILabel!
#IBOutlet weak var myLabel_TestResetTime: UILabel!
#IBOutlet weak var myLabel_CurrentEarlyTime: UILabel!
private var earlyTimePicker: UIDatePicker?
private var lateTimePicker: UIDatePicker?
override func viewDidLoad() {
super.viewDidLoad()
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in //ask for permission in order to show messages on the lock screen
if granted {
print("Yay!")
} else {
print("D'oh")
}
}
earlyTimePicker = UIDatePicker()
earlyTimePicker?.datePickerMode = .time //change to .time
earlyTimePicker?.addTarget(self, action: #selector(ViewController.earlyTimeChanged(earlyTimePicker:)),for: .valueChanged)
lateTimePicker = UIDatePicker()
lateTimePicker?.datePickerMode = .time //change to .time
lateTimePicker?.addTarget(self, action: #selector(ViewController.lateTimeChanged(lateTimePicker:)),for: .valueChanged)
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.viewTapped(gestureRecognizer:)))
view.addGestureRecognizer(tapGesture)
EarlyTimePicker.inputView = earlyTimePicker
LateTimePicker.inputView = lateTimePicker
}
#objc func viewTapped(gestureRecognizer: UITapGestureRecognizer){
view.endEditing(true)
}
var earlyTime=480
var earlyTimehour=0
var earlyTimeminute=0
#objc func earlyTimeChanged(earlyTimePicker: UIDatePicker){
let earlyTimeFormatter = DateFormatter()
earlyTimeFormatter.dateFormat = "h:mm a"
earlyTimeFormatter.amSymbol = "AM"
earlyTimeFormatter.pmSymbol = "PM"
EarlyTimePicker.text = earlyTimeFormatter.string(from: earlyTimePicker.date)
view.endEditing(true)
let earlyTimedate = earlyTimePicker.date
let earlyTimecomponents = Calendar.current.dateComponents([.hour, .minute], from: earlyTimedate)
earlyTimehour = earlyTimecomponents.hour!
earlyTimeminute = earlyTimecomponents.minute!
earlyTime = earlyTimecomponents.hour! * 60 + earlyTimecomponents.minute!
print("earlyTimehour: \(earlyTimecomponents.hour!)")
print("earlyTimeminute: \(earlyTimecomponents)")
print("earlyTime: \(earlyTime)")
print("Current Time: \(Date())")
}
var lateTime=1200
var lateTimehour=0
var lateTimeminute=0
#objc func lateTimeChanged(lateTimePicker: UIDatePicker){
let lateTimeFormatter = DateFormatter()
lateTimeFormatter.dateFormat = "h:mm a"
lateTimeFormatter.amSymbol = "AM"
lateTimeFormatter.pmSymbol = "PM"
LateTimePicker.text = lateTimeFormatter.string(from: lateTimePicker.date)
view.endEditing(true)
let lateTimedate = lateTimePicker.date
let lateTimecomponents = Calendar.current.dateComponents([.hour, .minute], from: lateTimedate)
lateTimehour = lateTimecomponents.hour!
lateTimeminute = lateTimecomponents.minute!
lateTime = lateTimecomponents.hour! * 60 + lateTimecomponents.minute!
let testMinute = lateTime % 60
let testHour = lateTime / 60
print("lateTimehour: \(lateTimecomponents.hour!)")
print("lateTimeminute: \(lateTimecomponents)")
print("lateTime: \(lateTime)")
print("testHour: \(testHour)")
print("testMinute: \(testMinute)")
myLabel_TestResetTime.text = "Time Set \(Date())"
myLabel_CurrentEarlyTime.text = "Current Early Time: \(earlyTime) / OnOff: \(OnOff)"
}
let PickedString = ["One","Two","Three","Four", "Five","Six","Seven","Eight"]
// #IBAction func TestCallFunction(_ sender: UIButton) {
// scheduleLocal()
// }
//NEED TO REPEAT THIS FUNCTION AT EARLY TIME - 10
//need to stop repeating with a cancel button (while bool true, do it, while false, stop. Default is false)
var RunDaily: Timer?
var OnOff = false
var QuestionNum = 1
#IBAction func Launch(_ sender: UIButton) {
OnOff = true
let center = UNUserNotificationCenter.current()
center.removeAllPendingNotificationRequests()
guard let QuestionNumA = Int(NumQuestions.text!) else { //This is how to get the UserInterface VALUE as a number
print("not a number!: \(String(describing: NumQuestions.text))")
return
}
print("Number of Questions: \(QuestionNumA)")
// var QuestionNum = 1
if QuestionNumA > 10 {QuestionNum=10} else {QuestionNum=QuestionNumA}
print("QuestionNumA:\(QuestionNumA) vs QuestionNum: \(QuestionNum)")
printStuff()
showMessage()
}
#IBAction func Stop(_ sender: UIButton) {
OnOff = false
printStuff()
}
func printStuff() {
if OnOff == true {
print("Bool is On : \(OnOff)")
RunDaily = Timer.scheduledTimer(timeInterval: 86400, target: self, selector: #selector(showMessage), userInfo: nil, repeats: true)//86400
}
if OnOff == false {
print("Bool is Off : \(OnOff)")
RunDaily?.invalidate()
let center = UNUserNotificationCenter.current()
center.removeAllPendingNotificationRequests()
}
}
func SaveDefaultData(){ // THis is the structure to SAVE input data for when the app relaunches (causes error when run.
let defaults = UserDefaults.standard
defaults.set("Date()", forKey:"key1")
//defaults.set(earlyTimePicker, forKey:"earlyTimePickerSet") cannot set earlyTimePicker. causes crash
// defaults.set(lateTimePicker, forKey:"lateTimePickerSet")
defaults.set(earlyTime, forKey:"earlyTimeSet")
defaults.set(lateTime, forKey:"lateTimeSet")
defaults.set(QuestionNum, forKey:"QuestionNumSet")
}
func SetDefaultData(){// THis is the structure to Set input for when the app relaunches
let defaults = UserDefaults.standard
if let savedValue = defaults.string(forKey: "key1"){
print("Here you will get saved value \(savedValue)")
} else {
print("No value in Userdefault,Either you can save value here or perform other operation")
defaults.set("Here you can save value", forKey: "key1")
}
if let earlyTimeValue = defaults.string(forKey: "earlyTimeSet"){
print("Here you will get saved value \(earlyTimeValue)")
earlyTime = UserDefaults.standard.value(forKey: "earlyTimeSet") as? Int ?? 485
} else {
print("No value in Userdefault,Either you can save value here or perform other operation")
defaults.set("Here you can save value", forKey: "earlyTimeSet")
earlyTime = 500
}
if let lateTimeValue = defaults.string(forKey: "lateTimeSet"){
print("Here you will get saved value \(lateTimeValue)")
lateTime = UserDefaults.standard.value(forKey: "lateTimeSet") as? Int ?? 1265
} else {
print("No value in Userdefault,Either you can save value here or perform other operation")
defaults.set("Here you can save value", forKey: "lateTimeSet")
lateTime = 1230
}
if let QuestionNumValue = defaults.string(forKey: "QuestionNumSet"){
print("Here you will get saved value \(QuestionNumValue)")
QuestionNum = UserDefaults.standard.value(forKey: "QuestionNumSet") as? Int ?? 4
} else {
print("No value in Userdefault,Either you can save value here or perform other operation")
defaults.set("Here you can save value", forKey: "QuestionNumSet")
QuestionNum = 2
}
}
#objc func showMessage() {
let center = UNUserNotificationCenter.current()
if lateTime <= earlyTime {
lateTime = earlyTime+1
if earlyTimehour <= 12 {
LateTimePicker.text = "\(earlyTimehour):\(earlyTimeminute) AM"
}
if earlyTimehour > 12 {
let EarlyTimeAfternoon = earlyTimehour - 12
LateTimePicker.text = "\(EarlyTimeAfternoon):\(earlyTimeminute) PM"
}
}
// center.removeAllPendingNotificationRequests()
// THIS IS WHERE ALL THE USER INPUT GETS INTO THE PROGRAM //
// guard let QuestionNumA = Int(NumQuestions.text!) else { //This is how to get the UserInterface VALUE as a number
// print("not a number!: \(String(describing: NumQuestions.text))")
// return
// }
//print("Number of Questions: \(QuestionNumA)")
// THIS IS WHERE ALL THE USER INPUT GETS INTO THE PROGRAM //
var RandHourArray:[Int] = [0]
var RandMinArray:[Int] = [0]
var RandQuestionArray:[Int] = [0]
var Counter = 1
// var QuestionNum = 1
//if QuestionNumA > 2 {QuestionNum=10} else {QuestionNum=QuestionNumA}
// print("QuestionNumA:\(QuestionNumA) vs QuestionNum: \(QuestionNum)")
for _ in 0 ... QuestionNum-1{
// Pick random times for badges
//let RandHour = Int.random(in: earlyTimehour ... lateTimehour)
let RandTimeMinFromMidnight = Int.random(in: self.earlyTime ... self.lateTime)
let ConvertRandTimeHours = RandTimeMinFromMidnight / 60
let ConvertRandTimeMinutes = RandTimeMinFromMidnight % 60
RandHourArray.append(ConvertRandTimeHours)
//let RandMin = Int.random(in: earlyTimeminute ... lateTimeminute)
RandMinArray.append(ConvertRandTimeMinutes)
let RandQuestion = Int.random(in: 0 ... self.PickedString.count-1)
RandQuestionArray.append(RandQuestion)
//print("RandTimeMinFromMidnight: \(RandTimeMinFromMidnight)")
// print("RandHourArray: \(RandHourArray)")
// print("ConvertRandTimeHours: \(ConvertRandTimeHours)")
// print("RandMinArray: \(RandMinArray)")
// print("ConvertRandTimeMinutes: \(ConvertRandTimeMinutes)")
}
myLabel_Questions.text = "# of questions: \(QuestionNum)"//\(QuestionNumA)"
myLabel_StartEndTime.text = "Start Time \(earlyTime) / End Time \(lateTime)"
let content_A = UNMutableNotificationContent()
content_A.title = "Prompt"
content_A.body = self.PickedString[RandQuestionArray[Counter]] //
content_A.categoryIdentifier = "alarm"
content_A.userInfo = ["customData": "fizzbuzz"]
content_A.sound = UNNotificationSound.default
var dateComponents_A = DateComponents()
dateComponents_A.hour = RandHourArray[Counter]
dateComponents_A.minute = RandMinArray[Counter]
let trigger_A = UNCalendarNotificationTrigger(dateMatching: dateComponents_A, repeats: false)
let request_A = UNNotificationRequest(identifier: UUID().uuidString, content: content_A, trigger: trigger_A)
center.add(request_A)
print("Request A time: \(RandHourArray[Counter]) : \(RandMinArray[Counter])")
print("Question String picked A: \(self.PickedString[RandQuestionArray[Counter]])")
Counter=2
if Counter<=QuestionNum {
let content_B = UNMutableNotificationContent()
content_B.title = "Prompt"
content_B.body = self.PickedString[RandQuestionArray[Counter]]
content_B.categoryIdentifier = "alarm"
content_B.userInfo = ["customData": "fizzbuzz"]
content_B.sound = UNNotificationSound.default
var dateComponents_B = DateComponents()
dateComponents_B.hour = RandHourArray[Counter]
dateComponents_B.minute = RandMinArray[Counter]
let trigger_B = UNCalendarNotificationTrigger(dateMatching: dateComponents_B, repeats: false)
let request_B = UNNotificationRequest(identifier: UUID().uuidString, content: content_B, trigger: trigger_B)
center.add(request_B)
print("Request B time: \(RandHourArray[Counter]) : \(RandMinArray[Counter])")
print("Question String picked B: \(self.PickedString[RandQuestionArray[Counter]])")
}
}
}

Answer 1

You should store your data inside UserDefaults, Keychain and Core Data or other stuff. if you dont store your data every time you close the application all the data will deallocate from the memory because they were stored in the heap.
Unsaved data:
let myLabel: UILabel = UILabel()
myLabel.text = "Some text"
Should save like:
UserDefaults.standard.setValue(myLabel.text, forKey: "it.is.custom")
And load like:
myLabel.text = UserDefaults.standard.value(forKey: "it.is.custom") as? String
refrence to study: https://fluffy.es/persist-data/