iscavengers iscavengers - 6 months ago 41
Objective-C Question

iPhone : Daily local notifications

I am trying to implement local notification

This is what I have set

// Current date
NSDate *date = [NSDate date];

// Add one minute to the current time
NSDate *dateToFire = [date dateByAddingTimeInterval:20];

// Set the fire date/time
[localNotification setFireDate:dateToFire];
[localNotification setTimeZone:[NSTimeZone defaultTimeZone]];

Instead of 20, I want to put a fixed time(daily)to start push.

For ex:I want to push notification pop up at every 6:00AM.

How can do that ?



You just need to properly create a NSDate object to be your fire date (time). Instead of using [NSDate dateByAddingTimeInterval: 20], use something like this:

NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
[components setDay: 3];
[components setMonth: 7];
[components setYear: 2012];
[components setHour: 6];
[components setMinute: 0];
[components setSecond: 0];
[calendar setTimeZone: [NSTimeZone defaultTimeZone]];
NSDate *dateToFire = [calendar dateFromComponents:components];

Here are the Apple NSDateComponents API docs

And then when you add the date to the notification, set the repeat interval to one day:

[localNotification setFireDate: dateToFire];
[localNotification setTimeZone: [NSTimeZone defaultTimeZone]];
[localNotification setRepeatInterval: kCFCalendarUnitDay];

As with all date related code, make sure to test how this works during the switch to daylight savings time, if your time zone uses daylight savings time.