[英]Swift 3 Local notifications not firing
我有以下设置,根本没有通知。
根据堆栈上的其他类似问题,我为每个请求添加了一个唯一的标识符,并且我还将内容添加到内容中。
我有这个请求用户许可的功能。
func sendIntNotifications()
{
//1. Request permission from the user
UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler:
{
(granted, error) in
if granted
{
print ("Notification access granted")
}
else
{
print(error?.localizedDescription)
}
UNUserNotificationCenter.current().delegate = self
})
// This function has a lot of other code that then calls this function to set multiple notifications :
for daysInt in outputWeekdays
{
scheduleActualNotification(hourInt: hourInt, minuteInt: minuteInt, dayInt: daysInt)
}
}
这些是主要功能:
func scheduleActualNotification(hourInt hour: Int, minuteInt minute: Int, dayInt day: Int)
{
// 3.1 create date components for each day
var dateComponents = DateComponents()
dateComponents.hour = hour
dateComponents.minute = minute
dateComponents.day = day
//3.2 Create a calendar trigger for that day at that time
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents,
repeats: true)
//3.3 Message content
let content = UNMutableNotificationContent()
content.title = "Test Title"
content.body = "Test body"
content.badge = 1
// 3.4 Create the actual notification
let request = UNNotificationRequest(identifier: "bob \(i+1)",
content: content,
trigger: trigger)
// 3.5 Add our notification to the notification center
UNUserNotificationCenter.current().add(request)
{
(error) in
if let error = error
{
print("Uh oh! We had an error: \(error)")
}
}
}
此功能用于在此应用程序打开时接收通知
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
completionHandler([.alert, .sound]) //calls the completionHandler indicating that both the alert and the sound is to be presented to the user
}
大声笑没有错误!
编辑:
所以从用户界面,我选择了2350以及周六和周日。 我希望通知在周六和周日2350发送。
我做了print(daysInt)
。 它的第一个值是1,它的第二个值是7,正如预期的那样。 其次,我进入了函数scheduleActualNotification
,小时的值是23,分钟是50,正如预期的那样。
谢谢!
经过数周的挫折,这就是解决方案:
将dateComponents.day = day
替换为dateComponents.weekday = day
。 .day
是一个月中的.weekday
一天,而.weekday
是一周中的哪一天!
也不要使用dateComponents.year = 2017
因为这会导致通知不会触发。
现在通知工作完全正常!!
Calendar Unit Flags可以帮助您:
var notificationTriggerCalendar : UNCalendarNotificationTrigger? = nil
if let fireDate = trigger.remindAt {
let unitFlags = Set<Calendar.Component>([.hour, .year, .minute, .day, .month, .second])
var calendar = Calendar.current
calendar.timeZone = .current
let components = calendar.dateComponents(unitFlags, from: fireDate)
let newDate = Calendar.current.date(from: components)
notificationTriggerCalendar = UNCalendarNotificationTrigger.init(dateMatching: components, repeats: true)
}
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