iOS local notification base on day, time frame and number of times? - ios

Question

After many researches on Stackoverflow and other websites, the only options I can find are either repeat notification on specific day of the week and specific time using:
dateComponents = DateComponents()
dateComponents.calendar = Calendar.current
dateComponents.hour = hour
dateComponents.minute = minute
dateComponents.weekday = 1 // Sunday
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
// the above will trigger every Sunday at whatever time I set it to be.
Another option to send notification is to set time interval but not much options.
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 30, repeats: true)
I cannot find any suggestion or solution to trigger notification (number of times starting at certain time on particular day). For example: I want to trigger 5 local notification every Sunday between 8am to 5pm.
Any suggestion? Thank you in advance.

Answer 1

If you want to schedule multiple notifications, you need to create multiple notification triggers and register them.
something like:
// Simple extension if you have to create multiple of the same object
extension DateComponents {
static func triggerFor(hour: Int, minute: Int) -> DateComponents {
var component = DateComponents()
component.calendar = Calendar.current
component.hour = hour
component.minute = minute
component.weekday = 1
return component
}
}
// Add each trigger into an array with the correct date component
let triggers = [
UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 1, minute: 0), repeats: true),
UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 2, minute: 0), repeats: true),
UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 3, minute: 0), repeats: true),
UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 4, minute: 0), repeats: true),
UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 5, minute: 0), repeats: true)
]
// Iterate through the array and register the notification with the system
for trigger in triggers {
// Create the content of the notification
let content = UNMutableNotificationContent()
content.title = "My Notification Title"
content.body = "Body of Notification"
// Create the request
let uuidString = UUID().uuidString
let request = UNNotificationRequest(identifier: uuidString,
content: content, trigger: trigger)
// Schedule the request with the system.
let notificationCenter = UNUserNotificationCenter.current()
notificationCenter.add(request) { (error) in
if error != nil {
// Handle any errors.
}
}
}

Answer 2

You would need to create your own times or dates; programming isn't smart and just going to do as you please. Coding is an exact science and needs to be treated as such.
var days = [2, 3, 4, 5, 6]
var hours = [10, 11, 12, 13, 14]
var minute = 0
for day in days {
for hour in hours {
dateComponents = DateComponents()
dateComponents.calendar = Calendar.current
dateComponents.hour = hour
dateComponents.minute = minute
dateComponents.weekday = 2
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
}
}
This should create a series of triggers that will deliver at the top of the hour for hours of 10 11 12 13 14 on the days of 2 3 4 5 6. In human terms, assuming I have these numbers correlated correctly, it should trigger to your users every hour from 10-2 at the top of the hour on M-F.
Tbh - never used UNCalenderNotificationTrigger, but assuming it works as you state, this will create triggers for each of those times.