我知道有几个问题here和 there关于如何删除本地通知,可能是全部或特定通知。我也浏览过local notification class reference并找到了一些方法,例如重复时间间隔、火灾日期、警报正文、时区等...但我无法找到有关如何修改已设置的火灾日期的某种信息。假设用户设置了今天的日期和下午 4:50 的通知,但如果用户希望修改设置的日期/时间,则发生的情况是通知在这两种情况下都会触发。就编程道德而言,这是一个错误!
实际上我想要的是必须取消之前的通知,即必须将日期修改为已编辑的日期,并且应在新日期设置并触发通知。
这就是我设置通知的方式,示例代码:
- (void)setNotification
{
//Set notification after confirmation of saved data
Class cls = NSClassFromString(@"UILocalNotification");
reminderNotification = [[cls alloc] init];
if (cls != nil)
{
NSDateFormatter *dateFormat = [[[NSDateFormatter alloc]init]autorelease];
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
NSDate *notificationDate = [dateFormat dateFromString:textField2.text];
reminderNotification.fireDate = notificationDate;
reminderNotification.timeZone = [NSTimeZone defaultTimeZone];
NSString *reminderText = [NSString stringWithFormat:@"%@ 's %@ on %@",textField.text,textField1.text,strDate];
reminderNotification.alertBody = reminderText;
reminderNotification.alertAction = @"View";
reminderNotification.soundName = @"lazy_afternoon.mp3";
reminderNotification.applicationIconBadgeNumber = 1;
NSDictionary *userDict = [NSDictionary dictionaryWithObject:self.textField1.text forKey:kReminder];
reminderNotification.userInfo = userDict;
[[UIApplication sharedApplication] scheduleLocalNotification:reminderNotification];
[reminderNotification release];
}
}
如何处理这个任务?
最佳答案
使用此方法来安排通知,其中 notificationID 必须是唯一的
-(void) scheduleNotificationForDate:(NSDate *)date AlertBody:(NSString *)alertBody ActionButtonTitle:(NSString *)actionButtonTitle NotificationID:(NSString *)notificationID{
UILocalNotification *localNotification = [[UILocalNotification alloc] init];
localNotification.fireDate = date;
localNotification.timeZone = [NSTimeZone localTimeZone];
localNotification.alertBody = alertBody;
localNotification.alertAction = actionButtonTitle;
localNotification.soundName = @"yourSound.wav";
NSDictionary *infoDict = [NSDictionary dictionaryWithObject:notificationID forKey:notificationID];
localNotification.userInfo = infoDict;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}
使用此方法取消具有该通知 ID 的特定通知
- (void)cancelLocalNotification:(NSString*)notificationID {
//loop through all scheduled notifications and cancel the one we're looking for
UILocalNotification *cancelThisNotification = nil;
BOOL hasNotification = NO;
for (UILocalNotification *someNotification in [[UIApplication sharedApplication] scheduledLocalNotifications]) {
if([[someNotification.userInfo objectForKey:notificationID] isEqualToString:notificationID]) {
cancelThisNotification = someNotification;
hasNotification = YES;
break;
}
}
if (hasNotification == YES) {
NSLog(@"%@ ",cancelThisNotification);
[[UIApplication sharedApplication] cancelLocalNotification:cancelThisNotification];
}
}
关于iphone - 更新本地通知的开火日期并取消之前的通知,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11137066/