How to save the disability of a button for Xcode - ios

Question

what i am to do with the button is once it is pressed it will disable for the rest of the day. now my code does disable it once it is pressed but if the user leaves the application and comes back to it, the button will be enabled again. is there a way to use NSUserDefaults?
let save = UserDefaults.standard
let calendar = Calendar.current
let now = Date()
this is in the viewDidLoad:
let seven_today = calendar.date(
bySettingHour: 7,
minute: 0,
second: 0,
of: now)!
let two_thirty_today = calendar.date(
bySettingHour: 14,
minute: 30,
second: 0,
of: now)!
if now >= seven_today && now <= two_thirty_today
{
getPointsOutlet.isEnabled = true
}
else
{
getPointsOutlet.isEnabled = false
}
this is the function of pressing the button:
Total_Points += 12
pointsLabel.text = "Total Points: \(Total_Points)"
getPointsOutlet.isEnabled = false

Answer 1

Try this:
if now >= seven_today && now <= two_thirty_today
{
let savedDayNum = defaults.integer(forKey: "dayClickNum")
let date = Date()
let calendar = Calendar.current
let nowDayNum = calendar.component(.day, from: date)
if(savedDayNum == nowDayNum)
{
getPointsOutlet.isEnabled = false
}
else
{
getPointsOutlet.isEnabled = true
}
}
else
{
getPointsOutlet.isEnabled = false
}
// in function click do this
Total_Points += 12
pointsLabel.text = "Total Points: \(Total_Points)"
getPointsOutlet.isEnabled = false
let date = Date()
let calendar = Calendar.current
let dayOfClickDate = calendar.component(.day, from: date)
defaults.set(dayOfClickDate, forKey: "dayClickNum")
Also for a perfect solution you may take care of month , as app may not be launched again by user for a month that may disable the button if the stored num day is coincidence d with open day of another month