添加通知 / 更新通知
1.创建一个UNNotificationRequest类的实例，一定要为它设置identifier, 在后面的查找，更新， 删除通知，这个标识是可以用来区分这个通知与其他通知
2.把request加到UNUserNotificationCenter， 并设置触发器，等待触发
3.
如果另一个request具有和之前request相同的标识，不同的内容， 可以达到更新通知的目的
NSString *requestIdentifer = @"TestRequest";
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:requestIdentifer content:content trigger:trigger1];
//把通知加到UNUserNotificationCenter, 到指定触发点会被触发
[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
}];
//在另外需要更新通知的地方
UNMutableNotificationContent *newContent = [[UNMutableNotificationContent alloc] init];
newContent.title = @"Update";
newContent.subtitle = @"XXXXXXXXX";
newContent.body = @"Copyright © 2016年 jpush. All rights reserved.";
UNTimeIntervalNotificationTrigger *trigger1 = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:3 repeats:NO];
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@"TestRequest" content:newContent trigger:trigger1];
[[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
}];
获取和删除通知
这里通知是有两种状态
•Pending 等待触发的通知
•Delivered 已经触发展示在通知中心的通知
//获取未触发的通知
[[UNUserNotificationCenter currentNotificationCenter] getPendingNotificationRequestsWithCompletionHandler:^(NSArray<UNNotificationRequest *> * _Nonnull requests) {
NSLog(@"pending: %@", requests);
}];
//获取通知中心列表的通知
[[UNUserNotificationCenter currentNotificationCenter] getDeliveredNotificationsWithCompletionHandler:^(NSArray<UNNotification *> * _Nonnull notifications) {
NSLog(@"Delivered: %@", notifications);
}];
//清除某一个未触发的通知
[[UNUserNotificationCenter currentNotificationCenter] removePendingNotificationRequestsWithIdentifiers:@[@"TestRequest1"]];
//清除某一个通知中心的通知
[[UNUserNotificationCenter currentNotificationCenter] removeDeliveredNotificationsWithIdentifiers:@[@"TestRequest2"]];
//对应的删除所有通知
[[UNUserNotificationCenter currentNotificationCenter] removeAllPendingNotificationRequests];
[[UNUserNotificationCenter currentNotificationCenter] removeAllDeliveredNotifications];
