如何在UNNotificationRequest中设置重复间隔和火灾日期

Question

以前，我在我的应用程序中使用UILocalNotification作为提醒用途。

但是如前所述，API在iOS中被否决了，现在，10.0需要使用UserNotifications框架的UNNotificationRequest。

使用UILocalNotification，我可以设置点火日期和重复间隔，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，我可以设置明天通知将被触发的日期，而且我还设置了重复间隔1周，这将从火灾日期开始。

如何使用UserNotifications框架的UNNotificationRequest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。

是否有任何可用的方法可以像UILocalNotification一样设置这两种方式？

Answer 1

您仍然可以使用火日期和重复间隔，但它并不像以前那么明显。初始化通知触发器时，可以将其重复参数设置为YES。重复间隔由通过dateMatching参数传递给触发器的date组件定义：

每日重复：

只需传递日期组件hour，minute，second

⟶触发器在那个时候每天都会开火

每周重复：

还传递所需的工作日组件：工作日、hour、minute、second

⟶触发器将在那个工作日每周发射一次。

下面是一个例子，它在明天同一时间发出通知，并每周重复一次：

Objective-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];

Swift:

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)