Swift changed DatePicker Date to Firebase - swift

Question

In my app, you click a button and the activity name and activity location is added to Firebase. I also want to add a selected time that you will be doing the activity to Firebase as well. To do this, I have created a DatePicker to pop up upon clicking the button, I have also managed to convert this to a string and upload to Firebase.
The issue I am having is the time that it uploads to Firebase is always the current time, am I right in saying I need to add an action to the DatePicker which will allow the selected time to be uploaded? If so how do I go about this?
func handleAddAgenda(){
var datePicker: UIDatePicker = UIDatePicker()
datePicker.datePickerMode = UIDatePickerMode.DateAndTime
//datePicker.addTarget(self, action: #selector(dateChanged), forControlEvents: UIControlEvents.ValueChanged)
datePicker.frame = CGRectMake(0, 0, 250, 460)
datePicker.backgroundColor = UIColor.whiteColor()
addSubview(datePicker)
class ActDate: NSObject {
var date: String?
}
var actDate: ActDate?
if actDate == nil {
actDate = ActDate()
}
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "hh:mm a"
actDate?.date = dateFormatter.stringFromDate(datePicker.date)
print(datePicker.date)
let userID = FIRAuth.auth()?.currentUser?.uid
let ref = FIRDatabase.database().reference().child("users").child(userID!).child("Agenda")
let childRef = ref.childByAutoId()
let values = ["activity": activityName.text!, "location": distance.text!, "date": actDate!.date!]
childRef.updateChildValues(values)
}

Answer 1

Yes, you need to add some action method to update the values when the datePicker date is selected. This will only work of course if you make the date picker a property of the whole class in order to grab the datePicker.date in the new method.
Something like this in viewDidLoad:
datePicker.datePickerMode = UIDatePickerMode.DateAndTime
datePicker.frame = CGRectMake(0, 0, 250, 460)
datePicker.backgroundColor = UIColor.whiteColor()
myDatePicker.addTarget(self, action: #selector(dateChanged), for: .valueChanged)
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "hh:mm a"
actDate?.date = dateFormatter.stringFromDate(datePicker.date)
Then you can have your handleAgenda simplified to this:
func handleAddAgenda(){
addSubview(datePicker)
print(datePicker.date)
}
And finally make the FireBase updates in the method:
func dateChanged() {
if let userID = FIRAuth.auth()?.currentUser?.uid {
let ref = FIRDatabase.database().reference().child("users").child(userID).child("Agenda")
let childRef = ref.childByAutoId()
if let activityName = activityName.text, let distance = distance.text, let date = datePicker.date {
let values = ["activity": activityName, "location": distance, "date": date]
childRef.updateChildValues(values)
}
}
}