我正在为本地通知实现代码。我的应用程序显示通知，它有两个按钮，两个按钮都有一些特定的动作。现在，我想在通知将显示且用户忽略通知且不单击任何按钮时进行操作，则它应在一分钟后重复通知。请告诉我该怎么做。
import UIKit
import UserNotifications
class ViewController: UIViewController, UNUserNotificationCenterDelegate {
var isGrantedAccess = false
let time:TimeInterval = 10.0
var triggered = false
@IBOutlet weak var checkinDateLbl: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
UNUserNotificationCenter.current().delegate = self
UNUserNotificationCenter.current().requestAuthorization(
options: [.alert,.sound,.badge],
completionHandler: { (granted,error) in
self.isGrantedAccess = granted
if granted{
self.setCategories()
} else {
let alert = UIAlertController(title: "Notification Access", message: "In order to use this application, turn on notification permissions.", preferredStyle: .alert)
let alertAction = UIAlertAction(title: "Okay", style: .default, handler: nil)
alert.addAction(alertAction)
self.present(alert , animated: true, completion: nil)
}
})
}
@IBAction func saveBtn(_ sender: Any) {
let checkin = checkinDateLbl.text
if checkin == "0000-00-00 00:00:00" {
if isGrantedAccess{
let content = UNMutableNotificationContent()
content.title = "Attendance Alert"
content.body = "Please Check In"
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "alarm.category"
var datee = DateComponents()
datee.hour = 21
datee.minute = 50
let triggerDate = UNCalendarNotificationTrigger(dateMatching: datee, repeats: true)
addNotification(content: content, trigger: triggerDate , indentifier: "Alarm")
}
}
}
//MARK: - Functions
func setCategories(){
let snoozeAction = UNNotificationAction(identifier: "snooze", title: "Notify after 30 Minutes", options: [])
let commentAction = UNTextInputNotificationAction(identifier: "comment", title: "Ignore", options: [])
let alarmCategory = UNNotificationCategory(identifier: "alarm.category",actions: [snoozeAction,commentAction],intentIdentifiers: [], options: [])
UNUserNotificationCenter.current().setNotificationCategories([alarmCategory])
}
func addNotification(content:UNNotificationContent,trigger:UNNotificationTrigger?, indentifier:String){
let request = UNNotificationRequest(identifier: indentifier, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: {
(errorObject) in
if let error = errorObject{
print("Error \(error.localizedDescription) in notification \(indentifier)")
}
})
}
// MARK: - Delegates
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert,.sound])
}
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
let identifier = response.actionIdentifier
let request = response.notification.request
if identifier == "snooze"{
let newContent = request.content.mutableCopy() as! UNMutableNotificationContent
newContent.title = "Notification"
newContent.body = "hi"
let newTrigger = UNTimeIntervalNotificationTrigger(timeInterval: time, repeats: true)
addNotification(content: newContent, trigger: newTrigger, indentifier: request.identifier)
}
// if identifier == "comment"{
// UNUserNotificationCenter.current().removeAllDeliveredNotifications()
//
// }
completionHandler()
}
}
答案 0 :(得分：0)
当在后台实际收到但未点击本地通知时，没有回调到iOS应用。实现此目的的唯一方法是 -安排您的通知，然后每x分钟安排一次提醒通知列表 -当用户点击您的按钮时，删除所有“提醒”通知
我们唯一的问题是可以安排的本地通知数量有限。
import UIKit
import UserNotifications
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
UNUserNotificationCenter.current().delegate = self
setCategories()
UNUserNotificationCenter.current().requestAuthorization(options: [.alert,.sound,.badge]) { granted, error in
}
// 10 seconds from now
var triggerComponents = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second], from: Date(timeInterval: 10, since: Date()))
triggerComponents.calendar = Calendar.current
let content = scheduleAlarm(title: "Alarm", body: "You will be reminded", atDate: triggerComponents)
// Schedule 10 reminders every 10 seconds
scheduleReminders(content: content, fromDate: triggerComponents, repeatCount: 10, every: 1, unit: .second)
}
func scheduleAlarm(title: String, body: String, atDate dateComponents: DateComponents) -> UNNotificationContent {
let content = UNMutableNotificationContent()
content.title = title
content.body = body
content.sound = UNNotificationSound.default
content.categoryIdentifier = "alarm.category"
let calendarTrigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: false)
addNotification(content: content, trigger: calendarTrigger , indentifier: "Alarm")
return content
}
/**
Schedules a serie of reminder notifications from an original notification
- Parameter content: The content to be scheduled.
- Parameter fromDate: The date at which was scheduled the original notification
- Parameter repeatCount: The number of reminders to schedule
- Parameter every: The interval at which the reminder should be scheduled
- Parameter unit: The unit of the interval
*/
func scheduleReminders(content: UNNotificationContent, fromDate dateComponents: DateComponents, repeatCount: Int, every: Int = 1, unit: Calendar.Component = .minute) {
// schedule the reminders
let calendar = Calendar.current
guard let triggerDate = dateComponents.date else { fatalError() }
for count in 1..<repeatCount {
// Add the reminder interval and unit to the original notification
guard let date = calendar.date(byAdding: unit, value: every * count, to: triggerDate) else { fatalError() }
let reminderDateComponents = calendar.dateComponents([.year, .month, .day, .hour, .minute, .second], from: date)
let reminderTrigger = UNCalendarNotificationTrigger(dateMatching: reminderDateComponents, repeats: false)
addNotification(content: content, trigger: reminderTrigger , indentifier: "reminder-\(date.timeIntervalSince1970)")
}
}
/// Removes all pending reminder notifications
func removeReminderNotifications() {
let center = UNUserNotificationCenter.current()
center.getPendingNotificationRequests() { requests in
// get all pending notifications with identifiers starting with "reminder"
let reminderIdentifiers = requests.filter({ $0.identifier.starts(with: "reminder")}).map { $0.identifier }
print("Removing pending reminders: \(reminderIdentifiers)")
center.removePendingNotificationRequests(withIdentifiers: reminderIdentifiers)
}
}
func setCategories() {
let snoozeAction = UNNotificationAction(identifier: "snooze", title: "Notify after 30 Minutes", options: [])
let commentAction = UNNotificationAction(identifier: "ignore", title: "Ignore", options: [])
let alarmCategory = UNNotificationCategory(identifier: "alarm.category",actions: [snoozeAction,commentAction],intentIdentifiers: [], options: [])
UNUserNotificationCenter.current().setNotificationCategories([alarmCategory])
}
func addNotification(content: UNNotificationContent, trigger: UNNotificationTrigger, indentifier: String) {
print("Scheduling notification at \(trigger)")
let request = UNNotificationRequest(identifier: indentifier, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { error in
if let error = error {
print("Error \(error.localizedDescription) in notification \(indentifier)")
}
}
}
}
extension ViewController: UNUserNotificationCenterDelegate {
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert,.sound])
UNUserNotificationCenter.current().getPendingNotificationRequests() { requests in
print("Pending requests: \(requests.count)")
}
}
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
// the user tapped the ignore button, remove all reminders
if response.actionIdentifier == "ignore" {
removeReminderNotifications()
}
completionHandler()
}
}
实际上，使用现在不推荐使用的UINotification曾经有一种更简单的方法，但是我不建议您使用不推荐使用的框架：https://openradar.appspot.com/26855019