IOS Study Notes 45-local notification uilocalnotification

There are two types of message push methods in iOS, one is remote server push (apns). I have mentioned apns: publish in my previous notes.

Uilocalnotification * notification = [[uilocalnotification alloc] init]; nsdateformatter * formatter = [[nsdateformatter alloc] init]; [formatter setdateformat: @ "HH: mm: SS"]; // The time when the notification is triggered nsdate * Now = [formatter datefromstring: @ "15:00:00"]; notification. firedate = now; // Time Zone Notification. timezone = [nstimezone defaulttimezone]; // The unit of the duplicate notification, which can be day, week, or month notification. repeatinterval = nsdaycalendarunit; // notification content notification. alertbody = @ "this is a new notification"; // notification of the sound played when the notification is triggered. soundname = uilocalnotificationdefaultsoundname; // execute the notification registration [[uiapplication sharedapplication] schedulelocalnotification: Notification];

The above code implements such a scenario: Some todo and alarm clock applications have the function of notifying users, using the local notification uilocalnotification in iOS, some applications will prompt users to return to the application at a fixed time every day, every week, or every month, and also use local notifications. The above code snippet will bring up a notification prompt at three o'clock P.M. every day.

To include parameter information in the notification, use the following method:

NSDictionary *dic = [NSDictionary dictionaryWithObject:@"name" forKey:@"key"];    notification.userInfo = dic;

If the software is running, you can use the callback method in appdelegate to obtain and process the parameter information:

-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{    if (notification) {        NSDictionary *userInfo =  notification.userInfo;        NSString *obj = [userInfo objectForKey:@"key"];        NSLog(@"%@",obj);    }}

In addition, you can cancel the registration of local notifications in two ways, one is to cancel the specified notification, and the other is to cancel all registration notifications:

[[UIApplication sharedApplication] cancelLocalNotification:localNotification];   [[UIApplication sharedApplication] cancelAllLocalNotification];

The above briefly introduces the use of uilocalnotification. You are welcome to correct and add it!

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