iOS development-Make local push uilocalnotification at specific times and at any time

When you need to send a local push, we need to set the firetime to send time, a lot of sample code on the Web is simply to set a time similar to 10 seconds later, but we may need to be in a custom or user defined a specific time to send, in fact, it is not difficult, Is the knowledge point of OC--the use of the time class of the common class.

First we need a specific time date, and we'll split it according to that time. This time is usually from the user set time.

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    Formatter.dateformat = @ "Yyyy-mm-dd hh:mm";
    NSDate *testdate = [formatter dateFromString:model.testTime];
    Nsassert (testdate!= Nil, @ "testdate = nil");

Second, splitting time requires two very important classes: the Nscalender class and the Nsdatecomponent class. Initializes the two variables, specifying units for the Nsdatecomponent class.

    To set the fire date
    Nscalendar *calender = [Nscalendar Autoupdatingcurrentcalendar];
    Nsdatecomponents *datecomponents = [Calender Components:nscalendarunityear | Nscalendarunitmonth | Nscalendarunitday Fromdate:testdate];

With the Component object, we are free to set the time for it. For example, I would like to remind seven points, for the component hour object Assignment 7 can be. You can then get a Date object from component.

    [Datecomponents Sethour:7];
    
    NSDate *firedate = [Calender datefromcomponents:datecomponents];
    NSLog (@ "Fire date =%@", firedate);

This enables the ability to set a specific time. The next part is the knowledge of local notifications.

Declare a Uilocalnotification object (pay attention to error judgment), set various properties for it, and invoke the application agent to send out the notification.

    Uilocalnotification *noti = [[Uilocalnotification alloc] init];
    if (Noti = = nil) {return
        ;
    }
    
    [Noti Settimezone:[nstimezone Defaulttimezone]];

    Noti.firedate = firedate;
    Noti.repeatinterval = 0;
    Noti.alertbody = [NSString stringwithformat:@] The%@ exam is about to begin today at%d, where is%@, are you ready? ", Model.testname, Datecomponents.hour, model.testlocation];
    Noti.alertaction = @ "View";
    Noti.soundname = Uilocalnotificationdefaultsoundname;
    Noti.applicationiconbadgenumber + 1;
    Noti.userinfo = @{@ "Kind": @ "Testbeginlocalnotification"};
    
    [[UIApplication sharedapplication] schedulelocalnotification:noti];

In the end, don't forget to launch in the Appdelegate.

-----Appdelegate's Didfinishlaunchingwithoptions method-------

    //reset the application icon badge
    number Application.applicationiconbadgenumber = 0;
    
    Handle launching from a notification
    uilocalnotification *localnotif =
    [launchoptions objectforkey: Uiapplicationlaunchoptionslocalnotificationkey];
    if (localnotif) {
        NSLog (@ "recieved Notification%@", localnotif);
    }

Attach the complete code in your application for reference error correction--

-(void) Setuplocalnotificationwithmodel: (Testmodel *) model {if (Model.shouldremind = NO) {return;
    } uilocalnotification *noti = [[Uilocalnotification alloc] init];
    if (Noti = = nil) {return;
    } [Noti Settimezone:[nstimezone Defaulttimezone]];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    Formatter.dateformat = @ "Yyyy-mm-dd hh:mm";
    NSDate *testdate = [Formatter dateFromString:model.testTime];
    
    Nsassert (testdate!= Nil, @ "testdate = nil");
    To set the fire date nscalendar *calender = [Nscalendar Autoupdatingcurrentcalendar]; Nsdatecomponents *datecomponents = [Calender Components:nscalendarunityear | Nscalendarunitmonth |
    Nscalendarunitday Fromdate:testdate];
    
    [Datecomponents Sethour:7];
    NSDate *firedate = [Calender datefromcomponents:datecomponents];
    
    NSLog (@ "Fire date =%@", firedate);
    Noti.firedate = firedate;
    
    Noti.repeatinterval = 0; to GET the hour datecomponents = [calender components:nscalendarunithour fromdate:testdate];
    NSLog (@ "Test date hour =%d", datecomponents.hour); Noti.alertbody = [NSString stringwithformat:@] The%@ exam is about to begin today at%d, where is%@, are you ready?
    ", Model.testname, Datecomponents.hour, model.testlocation];
    NSLog (@ "Tip:%@", noti.alertbody);
    Noti.alertaction = @ "View";
    Noti.soundname = Uilocalnotificationdefaultsoundname;
    NSLog (@ "Notification application icon Badge number =%d", noti.applicationiconbadgenumber);
    Noti.applicationiconbadgenumber + 1;
    
    Noti.userinfo = @{@ "Kind": @ "Testbeginlocalnotification"};
[[UIApplication sharedapplication] schedulelocalnotification:noti]; }