如何在 UNNotificationRequest 中设置重复间隔和触发日期

Question

以前我在我的应用程序中使用UILocalNotification 进行提醒。

但如上所述 API 在 iOS 10.0 中已弃用，现在需要使用 UserNotifications Framework 的UNNotificationRequest。

使用UILocalNotification 我可以设置触发日期和重复间隔，如下所示：

UILocalNotification *localNotification = [[UILocalNotification alloc] init];

    NSDate *tomorrow = [NSDate dateWithTimeInterval:(24*60*60) sinceDate:[NSDate date]];
    localNotification.fireDate = tomorrow;


    if(repeatUnit!=0){
          localNotification.repeatInterval = NSWeekCalendarUnit;
    }

    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

在上面的代码中，我可以设置明天的通知将触发的日期，并且我设置了 1 周的重复间隔，这将从触发日期开始。

如何使用 UserNotifications Framework 的 UNNotificationRequest 来实现这一点。

因为在新的 api 中我们可以使用触发器UNCalendarNotificationTrigger 和UNTimeintervalNotificationTrigger 来启动UNNotificationRequest。

有什么方法可以像UILocalNotification 那样设置吗？

Answer 1

您仍然可以使用触发日期和重复间隔，但它不像以前那么明显了。初始化通知触发器时，将其重复参数设置为YES。重复间隔由您通过dateMatching 参数传递给触发器的日期组件定义：

每天重复：
只需传递日期组件小时、分钟、秒
⟶ 触发器每天都会在那个时候触发

每周重复：
同时传递所需的工作日组件：weekday、hour、minute、second
⟶ 触发器将在每周的那个工作日触发

这是一个示例，它在明天的同一时间触发通知并每周重复一次：

目标-C：

UNMutableNotificationContent *notification = [[UNMutableNotificationContent alloc] init];

// find out what weekday is tomorrow
NSDate *sameTimeTomorrow = [NSDate dateWithTimeIntervalSinceNow:60*60*24];
NSInteger weekdayTomorrow = [[NSCalendar currentCalendar] component:NSCalendarUnitWeekday fromDate: sameTimeTomorrow];

// set the current time (without weekday)
unsigned unitFlags = NSCalendarUnitHour | NSCalendarUnitMinute |  NSCalendarUnitSecond;
NSDateComponents *firstFireDateComponents = [[NSCalendar currentCalendar] components:unitFlags fromDate:sameTimeTomorrow];

// add tomorrow's weekday
firstFireDateComponents.weekday = weekdayTomorrow;

// set a repeating trigger for the current time and tomorrow's weekday
// (trigger repeats every week on that weekday at the current time)
UNCalendarNotificationTrigger *notificationTrigger = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:firstFireDateComponents repeats:YES];

UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@"notification" content:notification trigger:notificationTrigger];
[[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler: nil];

斯威夫特：

let notification = UNMutableNotificationContent()

// find out what weekday is tomorrow
let weekDayTomorrow = Calendar.current.component(.weekday, from: Date(timeIntervalSinceNow: 60*60*24))

// set the current time (without weekday)
var firstFireDateComponents = Calendar.current.dateComponents([.hour, .minute, .second], from: Date())

// add tomorrow's weekday
firstFireDateComponents.weekday = weekDayTomorrow

// set a repeating trigger for the current time and tomorrow's weekday
// (trigger repeats every week on that weekday at the current time)
let notificationTrigger = UNCalendarNotificationTrigger(dateMatching: firstFireDateComponents, repeats: true)

let request = UNNotificationRequest(identifier: "notification", content: notification, trigger: notificationTrigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)