iOS10通知(三)--通知的取消和修改

iOS- 实现APP前台、后台、甚至杀死进程下收到通知后进行语音播报（金额）

https://www.jianshu.com/p/601426a247e6

iOS10通知(三)--通知的取消和修改

 https://blog.csdn.net/xttxqjfg/article/details/68926335

在创建通知时，我们可以指定标识符。这个标识符可以用来管理通知。

在 iOS 10 之前，我们很难取消掉某一个特定的通知，也不能主动移除或者更新已经展示的通知。

iOS 10 中，UserNotifications 框架提供了一系列管理通知的 API，你可以做到

1、取消还未展示的通知
2、修改还未展示的通知
3、删除已经展示过的通知
4、修改已经展示过的通知

其中关键就在于在创建请求时使用同样的标识符。

取消和修改目前还不能用于远程推送，我还没有查找到相关可以实现的资料，如有了解的可以留言告诉我

详细的代码实现如下

1.  
   -(void)btnClicked:(UIButton *)sender
2.  
   {
3.  
   //创建两个用于测试的消息体
4.  
   UNMutableNotificationContent *content1 = [[UNMutableNotificationContent alloc]init];
5.  
   content1.title = @"1";
6.  
   content1.body = @"通知1";
7.  
    
8.  
   UNMutableNotificationContent *content2 = [[UNMutableNotificationContent alloc]init];
9.  
   content2.title = @"2";
10.  
    content2.body = @"通知2";
11.  
     
12.  
    switch (sender.tag) {
13.  
    case 1001:
14.  
    {
15.  
    //发送 取消
16.  
    UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:5 repeats:NO];
17.  
    NSString *identifier = @"SendAndCancle";
18.  
    UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier content:content1 trigger:trigger];
19.  
     
20.  
    [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
21.  
    //
22.  
    }];
23.  
     
24.  
    //延迟2秒之后执行
25.  
    dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0/*延迟执行时间*/ * NSEC_PER_SEC));
26.  
     
27.  
    dispatch_after(delayTime, dispatch_get_main_queue(), ^{
28.  
    [[UNUserNotificationCenter currentNotificationCenter] removePendingNotificationRequestsWithIdentifiers:@[identifier]];
29.  
    });
30.  
    break;
31.  
    }
32.  
    case 1002:
33.  
    {
34.  
    //发送 更新
35.  
    UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:5 repeats:NO];
36.  
    NSString *identifier = @"SendAndModify";
37.  
    UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier content:content1 trigger:trigger];
38.  
     
39.  
    [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
40.  
    //
41.  
    }];
42.  
     
43.  
    //延迟2秒之后执行
44.  
    dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0/*延迟执行时间*/ * NSEC_PER_SEC));
45.  
     
46.  
    dispatch_after(delayTime, dispatch_get_main_queue(), ^{
47.  
     
48.  
    //用相同的标识再次发送即可覆盖
49.  
    UNTimeIntervalNotificationTrigger *triggerNew = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:3 repeats:NO];
50.  
     
51.  
    UNNotificationRequest *requestNew = [UNNotificationRequest requestWithIdentifier:identifier content:content2 trigger:triggerNew];
52.  
     
53.  
    [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:requestNew withCompletionHandler:^(NSError * _Nullable error) {
54.  
    //
55.  
    }];
56.  
    });
57.  
     
58.  
    break;
59.  
    }
60.  
    case 1003:
61.  
    {
62.  
    //发送 删除
63.  
    UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:3 repeats:NO];
64.  
    NSString *identifier = @"deliveredSendAndRemove";
65.  
    UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier content:content1 trigger:trigger];
66.  
     
67.  
    [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
68.  
    //
69.  
    }];
70.  
     
71.  
    //延迟4秒之后执行
72.  
    dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5.0/*延迟执行时间*/ * NSEC_PER_SEC));
73.  
     
74.  
    dispatch_after(delayTime, dispatch_get_main_queue(), ^{
75.  
    [[UNUserNotificationCenter currentNotificationCenter] removeDeliveredNotificationsWithIdentifiers:@[identifier]];
76.  
    });
77.  
     
78.  
    break;
79.  
    }
80.  
    case 1004:
81.  
    {
82.  
    //发送 修改
83.  
    UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:3 repeats:NO];
84.  
    NSString *identifier = @"deliveredSendAndModify";
85.  
    UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier content:content1 trigger:trigger];
86.  
     
87.  
    [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
88.  
    //
89.  
    }];
90.  
     
91.  
    //延迟4秒之后执行
92.  
    dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5.0/*延迟执行时间*/ * NSEC_PER_SEC));
93.  
     
94.  
    dispatch_after(delayTime, dispatch_get_main_queue(), ^{
95.  
     
96.  
    //用相同的标识再次发送即可覆盖
97.  
    UNTimeIntervalNotificationTrigger *triggerNew = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:3 repeats:NO];
98.  
     
99.  
    UNNotificationRequest *requestNew = [UNNotificationRequest requestWithIdentifier:identifier content:content2 trigger:triggerNew];
100.  
      
101.  
     [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:requestNew withCompletionHandler:^(NSError * _Nullable error) {
102.  
     //
103.  
     }];
104.  
      
105.  
     });
106.  
     break;
107.  
     }
108.  
      
109.  
     default:
110.  
     break;
111.  
     }
112.  
     }

最终的效果图可以在实现之后自行查看，这里就不上传介绍了