本地通知不在iphone中触发

Question

我在使用动作表选择器视图.它工作正常.但是我想local notification在特定的时间开始时time picker发射,它不会发射local notification.我用过这段代码:

enter code here

      - (void)actionPickerDone {

       if (nil != self.data) {
//send data picker message[self.target performSelector:self.action     withObject:[NSNumbernumberWithInt:self.selectedIndex]];
        }
else {
    //send date picker message
    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];

    // Get the current date
    NSDate *pickerDate = [self.datePicker date];
    // Break the date up into components
    NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit ) 
                                                   fromDate:pickerDate];
    NSDateComponents *timeComponents = [calendar components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit ) 
                                                   fromDate:pickerDate];

    // Set up the fire time
    NSDateComponents *dateComps = [[NSDateComponents alloc] init];
    [dateComps setDay:[dateComponents day]];
    [dateComps setMonth:[dateComponents month]];
    [dateComps setYear:[dateComponents year]];
    [dateComps setHour:[timeComponents hour]];
    // Notification will fire in one minute
    [dateComps setMinute:[timeComponents minute]];
    [dateComps setSecond:[timeComponents second]];
    NSDate *itemDate = [calendar dateFromComponents:dateComps];
    [dateComps release];

    UILocalNotification *localNotif = [[UILocalNotification alloc] init];
    if (localNotif == nil)
        return;
    localNotif.fireDate = itemDate;
            NSLog(@"%@what is this",itemDate);
    localNotif.timeZone = [NSTimeZone defaultTimeZone];
            NSLog(@"i8i8i88i");

    // Notification details
    //localNotif.alertBody = [eventText text];
    // Set the action button
    localNotif.alertAction = @"View";

    localNotif.soundName = UILocalNotificationDefaultSoundName;
    localNotif.applicationIconBadgeNumber = 1;

    // Specify custom data for the notification
    NSDictionary *infoDict = [NSDictionary dictionaryWithObject:@"someValue" forKey:@"someKey"];
    localNotif.userInfo = infoDict;

    // Schedule the notification
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
    [localNotif release];
    }

这段代码有什么问题.请帮助我.

Answer 1

我执行了你的代码并且通知没有触发.然后我取消注释了localNotif.alertBody赋值语句,它确实触发了.如果您未指定alertBody,则本地通知不会显示为警报.此外,Idan提出的观点也是有效的.如果您的应用程序位于前台,则不会显示通知,而是您将在应用程序委托中获得回调,您应在其中显示带有消息notification.alertBody的警报以确保一致性.

希望这可以帮助 :)

PS你不需要你正在做的所有日历组件.记录它们,你会发现pickerDate和itemDate都是一样的.