How to save the date the user presses a button in swift? - ios

Question

I want the code to run once a day, but the way I want to accomplish this is by disabling the button after it is clicked and then reenabling when it has been more than 24 hours.
Would the code below be correct to just save the date the user pressed the button?
if distance < radius{
Total_Points += 10
pointsLabel.text = "Total Points: \(Total_Points)"
getPointsOutlet.isEnabled = false
let clickdate = UserDefaults.standard
if var timeList = clickdate.object(forKey: "timeList") as? [Date]{
timeList.append(Date())
clickdate.set(timeList, forKey: "timeList")
} else {
clickdate.set([Date()], forKey: "timeList")
}
clickdate.synchronize()
}
let PointsDefault = UserDefaults.standard
PointsDefault.setValue(Total_Points, forKey: "Total Points")

Answer 1

Your code
let clickdate = UserDefaults.standard
if var timeList = clickdate.object(forKey: "timeList") as? [Date]{
timeList.append(Date())
clickdate.set(timeList, forKey: "timeList")
} else {
clickdate.set([Date()], forKey: "timeList")
}
clickdate.synchronize()
Is fine for adding a date to an array of saved dates. You could pull that out into a separate function:
func addDateToDefaults(date: Date? = nil) {
let defaults = UserDefaults.standard
if date = nil {
date = Date()
}
if var timeList = defaults.object(forKey: "timeList") as? [Date]{
timeList.append(date)
defaults.set(timeList, forKey: "timeList")
} else {
defaults.set([date!], forKey: "timeList")
}
}
Then you could call that from a button action:
#IBAction func buttonClicked(_ sender: UIButton) {
addDateToDefaults()
//The rest of your button action code goes here
}
With the function addDateToDefaults() above, you can pass in a specific date, or leave off the date parameter and it will append the current date to your array of dates.

Answer 2

You can achieve in this way when you tapped on button save the date value using Userdefaults and then inside your ViewDidAppear, ViewDidload and UIApplicationWillEnterForeground notification method put the check to get dateValue from user defaults and then take the difference of current date and last stored date and accordingly enabled your button.
lazy var userDefaults: UserDefaults = {
return UserDefaults.standard
}()
func ViewDidLoad() {
UserDefaults.set(Date(), forKey:"date")
userDefaults.synchronize()
}
func someMethodWhereYouWantToGetValue() {
guard let value = userDefaults.object(forKey: "date") as? Date else
{return}
print(value)
}