如何在ios中所选日期的两周之前设置提醒

Question

我有以下要求，

1. 首先需要选择日期。
2. 然后应用程序需要显示提醒选项，如（2周前，1周前，3天前等），
3. 如果所选日期是从现在开始的两天，那么我需要在选项前2周和1周前停用。

下面是使用但不起作用的代码，

 - (IBAction)timePicker:(id)sender {

selectedTimeRow = [sender tag];


NSDate *date2=[NSDate date];


NSDate *DaysAgo;

if (selectedTimeRow==0) {
    DaysAgo = [date2 dateByAddingTimeInterval:14*24*60*60];
    NSLog(@"14 days ago: %@", DaysAgo);

}else if (selectedTimeRow==1){
    DaysAgo = [date2 dateByAddingTimeInterval:7*24*60*60];
    NSLog(@"7 days ago: %@", DaysAgo);

}else if (selectedTimeRow==2){
    DaysAgo = [date2 dateByAddingTimeInterval:3*24*60*60];
    NSLog(@"3 days ago: %@", DaysAgo);

}else if (selectedTimeRow==3){
    DaysAgo = [date2 dateByAddingTimeInterval:1*24*60*60];
    NSLog(@"1 days ago: %@", DaysAgo);

}



NSDateFormatter *format = [[NSDateFormatter alloc] init];
format.dateFormat = @"dd/MM/yyyy";
NSString *dateNew=[format stringFromDate:DaysAgo];

UIButton *button = (UIButton *)sender;
UITableViewCell *cell = (UITableViewCell*)[button superview];

//

NSComparisonResult result = [dateNew compare:_SavedDate];
if(result == NSOrderedAscending)
{
    NSLog(@"date1 is later than date2");
  cell.userInteractionEnabled=NO;


}else if (result == NSOrderedDescending) {
    NSLog(@"date1 is earlier than date2");

       [self calltoolrBar];
    cell.userInteractionEnabled=YES;
}
else
{
    NSLog(@"date1 is equal to date2");
    [self calltoolrBar];
    cell.userInteractionEnabled=YES;
        }
}

Answer 1

1. 两周前约会

   NSDate * selecteDate = YOUR_DATE; NSDate * twoWeeksAgoDate = [selecteDate dateByAddingTimeInterval：-14 * 24 * 60 * 60]; // -14是14天（2周）之前。你需要根据自己的意愿改变。 NSLog（@＆＃34;两周前：％@＆＃34;，twoWeeksAgoDate）;

2. 为twoWeeksAgo Date设置本地通知

   UILocalNotification * notification = [[UILocalNotification alloc] init];    notification.repeatInterval = NSDayCalendarUnit;    [notification setAlertBody：@＆＃34; Your Reminder＆＃34;];    [notification setFireDate：twoWeeksAgoDate];    [notification setTimeZone：[NSTimeZone defaultTimeZone]];    [application setScheduledLocalNotifications：[NSArray arrayWithObject：notification]];