Question

这就是我设置本地通知的方式，一切正常。

        NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
        NSDateComponents *components = [gregorianCalendar components:NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit |NSHourCalendarUnit|NSMinuteCalendarUnit fromDate:[_datePicker date]];
        NSLog(@"%@",[_datePicker date]);
        NSDate *fireDate = [gregorianCalendar dateFromComponents:components];
        NSLog(@"Fire date : %@",fireDate);

        // check if the time is already passed
        if ([fireDate compare:[NSDate date]] == NSOrderedAscending)
        {
            // if it does add 1 day
            components.day = components.day+1;
            fireDate = [gregorianCalendar dateFromComponents:components];
        }
        NSLog(@"Fire date : %@",fireDate);


        for (int i = 0; i < 7; i++) {

            NSDate *scheduleDate = [fireDate dateByAddingTimeInterval:(i * 24.0f * 3600.0f)];
            NSDateComponents *componentsForEachDay = [gregorianCalendar components:NSWeekdayCalendarUnit fromDate:scheduleDate];
            if (componentsForEachDay.weekday != 7) { // To skip Saturday

                localNotification = [[UILocalNotification alloc] init];
                localNotification.repeatInterval = NSWeekCalendarUnit;
                localNotification.fireDate = fireDate;
                localNotification.timeZone = [NSTimeZone defaultTimeZone];
                localNotification.soundName = UILocalNotificationDefaultSoundName;
                localNotification.alertBody = @"test";
                localNotification.repeatInterval = NSCalendarUnitDay;
                localNotification.applicationIconBadgeNumber = 0;

                    NSDictionary *infoDict = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"%i",i] forKey:[NSString stringWithFormat:@"bracletNotif%i",i]];
localNotification.userInfo = infoDict;

[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

我总是只获取userInfo中的最后一个对象..如何将所有scheduleLocalNotification存储在userInfo中以便以后取消？它的工作原理如何？在每个scheduleLocalNotification我需要之前保存一个对象和密钥？或者我可以将它们全部保存在一个？因为我已经尝试过这样做，我得到了所有的userInfo对象但是无法删除它们：/

请SOS。

Answer 1

如果您尝试取消所有braclet次通知，而不是向他们提供所有不同的键/值，则可以执行以下操作：

localNotification.userInfo = @{@"category": @"bracelet"};

取消：

[[[UIApplication sharedApplication] scheduledLocalNotifications] enumerateObjectsUsingBlock:^(UILocalNotification *notification, NSUInteger idx, BOOL *stop) {
    NSDictionary *userInfo;
    if((userInfo = [notification userInfo])){
        NSString *categoryValue;
        if((categoryValue = [userInfo objectForKey:@"category"]) && [categoryValue isEqualToString:@"bracelet"]){
            [[UIApplication sharedApplication] cancelLocalNotification: notification];
        }
    }
}];

我们在这里做的是将所有通知分组到category：bracelet。由于未来sdk的变化，我选择了密钥category。我们可以安排更多通知category：neckless

然后，如果需要，我们会遍历所有UILocalNotifications并在通知category中扫描userInfo键，如上所示，如果键值等于bracelet，然后我们取消通知。

if((categoryValue = [userInfo objectForKey:@"category"]) && [categoryValue isEqualToString:@"bracelet"]){

这行代码检查category的密钥是否存在（即不是nil），同时将其分配给变量categoryValue，然后if语句立即检查categoryValue是否bracelet 1}}等于NSString *categoryValue = [userInfo objectForKey:@"category"]; if(categoryValue && [categoryValue isEqualToString:@"bracelet"]){

它本可以改写为：

{{1}}

在UserInfo中存储多个UILocalNotification

1 个答案: