在特定日期触发UILocalNotification

本文介绍了在特定日期触发UILocalNotification的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想在特定的日期触发UILocalNotification.如果我使用此代码:

I want to fire a UILocalNotification in a specific Date. If I use this code:

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDateComponents *components = [gregorian components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:[NSDate date]]; [components setHour:4]; [components setMinute:0]; NSDate *fireDate = [gregorian dateFromComponents:components];

如果现在是下午3点，则可以正常工作，但例如到下午5点时，则不能正常工作.

If now it's 3 pm this works fine, but it doesn't when, for example, it's 5 pm.

如何将通知触发日期设置为下一个下午4点"?

How can I set the notification fire date to "the next 4 pm" ?

推荐答案

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDateComponents *components = [gregorian components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:[NSDate date]]; [components setHour:4]; [components setMinute:0]; NSDate *fireDate = [gregorian dateFromComponents:components]; NSLog(@"Fire date : %@",fireDate);// Today 4pm is already passed. So you wont get notification // You need to check if the time is already passed if ([fireDate compare:[NSDate date]] == NSOrderedAscending) { // Schedule it for next day 4pm components.day = components.day+1; fireDate = [gregorian dateFromComponents:components]; } NSLog(@"Fire date : %@",fireDate);