ios - 如何在 UNNotificationRequest 中设置重复间隔和触发日期
<p><p>以前我在我的应用程序中使用 <code>UILocalNotification</code> 进行提醒。</p>
<p>但如上 API 在 iOS 10.0 中已弃用，现在需要使用 UserNotifications Framework 的 <code>UNNotificationRequest</code>。</p>
<p>使用 <code>UILocalNotification</code> 我能够设置触发日期以及重复间隔，如下所示:</p>
<pre><code>UILocalNotification *localNotification = [ init];
NSDate *tomorrow = ];
localNotification.fireDate = tomorrow;
if(repeatUnit!=0){
localNotification.repeatInterval = NSWeekCalendarUnit;
}
[ scheduleLocalNotification:localNotification];
</code></pre>
<p>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。</p>
<p>如何使用 UserNotifications Framework 的 <code>UNNotificationRequest</code> 来实现。</p>
<p>因为在新的 api 中我们可以使用触发器 <code>UNCalendarNotificationTrigger</code> 和 <code>UNTimeintervalNotificationTrigger</code> 来启动 <code>UNNotificationRequest</code>。</p>
<p>有什么方法可以像 <code>UILocalNotification</code> 那样设置吗？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>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 <code>YES</code>。重复间隔由您通过 <code>dateMatching</code> 参数传递给触发器的日期组件定义:</p>
<p><strong>每天重复:</strong><br/>
只需传递日期组件 <strong>hour</strong>、<strong>minute</strong>、<strong>second</strong><br/>
⟶ 触发器每天都会在那个时候触发</p>
<p><strong>每周重复:</strong><br/>
同时传递所需的工作日组件:<strong>weekday</strong>、<strong>hour</strong>、<strong>minute</strong>、<strong>second</strong><br/>
⟶ 触发器将在每周的那个工作日触发</p>
<p>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:</p>
<p><strong> objective-C :</strong> </p>
<pre><code>UNMutableNotificationContent *notification = [ init];
// find out what weekday is tomorrow
NSDate *sameTimeTomorrow = ;
NSInteger weekdayTomorrow = [ component:NSCalendarUnitWeekday fromDate: sameTimeTomorrow];
// set the current time (without weekday)
unsigned unitFlags = NSCalendarUnitHour | NSCalendarUnitMinute |NSCalendarUnitSecond;
NSDateComponents *firstFireDateComponents = [ 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 = ;
UNNotificationRequest *request = ;
[ addNotificationRequest:request withCompletionHandler: nil];
</code></pre>
<p><strong> swift :</strong> </p>
<pre><code>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)
</code></pre></p>
<p style="font-size: 20px;">关于ios - 如何在 UNNotificationRequest 中设置重复间隔和触发日期，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/47135461/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/47135461/
</a>
</p>
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