两个本地通知错误

Posted 2023-03-05

【中文标题】两个本地通知错误

【英文标题】：Two Local Notifications Error

【发布时间】：2013-06-18 11:34:14

【问题描述】：

我正在制作一个使用本地通知的应用程序。我正在尝试并使用两个实例。当我运行杀死应用程序时，只显示一个通知。这是应用程序delegate.m中的代码

- (void)applicationDidEnterBackground:(UIApplication *)application



//1
NSCalendar *gregcalendar2 = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];

NSDateComponents *datecomponent2 = [gregcalendar2 components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit fromDate:[NSDate date]];

[datecomponent2 setYear:2013];
[datecomponent2 setMonth:6];
[datecomponent2 setDay:18];
[datecomponent2 setHour:16];
[datecomponent2 setMinute:58];

UIDatePicker *dd2 = [[UIDatePicker alloc]init];
[dd2 setDate:[gregcalendar2 dateFromComponents:datecomponent2]];


UILocalNotification *notification2 = [[UILocalNotification alloc]init];
[notification2 setAlertBody:@"two"];
[notification2 setFireDate:dd2.date];
[notification2 setTimeZone:[NSTimeZone defaultTimeZone]];
[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification2]];


//2

NSCalendar *gregcalendar1 = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];

NSDateComponents *datecomponent1 = [gregcalendar1 components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit fromDate:[NSDate date]];

[datecomponent1 setYear:2013];
[datecomponent1 setMonth:6];
[datecomponent1 setDay:18];
[datecomponent1 setHour:16];
[datecomponent1 setMinute:59];

UIDatePicker *dd1 = [[UIDatePicker alloc]init];
[dd1 setDate:[gregcalendar1 dateFromComponents:datecomponent1]];


UILocalNotification *notification1 = [[UILocalNotification alloc]init];
[notification1 setAlertBody:@"one"];
[notification1 setFireDate:dd1.date];
[notification1 setTimeZone:[NSTimeZone defaultTimeZone]];
[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification1]];

【参考方案1】：

首先，你这样做：

[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification2]];

然后

[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification1]];

这意味着：用包含notification1的数组替换所有之前安排的本地通知（在本例中为notification2）。

你可以使用：

[application scheduleLocalNotification:notification1];
[application scheduleLocalNotification:notification2];

或：

[application setScheduledLocalNotifications:@[notification1, notification2]];