ios - 日期无法比较

Question

我想检查用户选择的日期是否与当前日期相同。我正在使用这段代码。我可以检查所选日期是过去还是将来，但我无法检测它是否相同，因为当我记录这两个日期时，它都是这种格式。我的意思是今天的日期时间和选定的日期时间之间存在差异。所以被认为是较少。这是日志:

selected date:2014-01-03 05:53:53 +0000 , today date: 2014-01-03 05:54:20 +0000

这是我的代码:

 NSDate *today = [NSDate date]; // it will give you current date
NSDate *newDate = datePicker.date; // your date

NSComparisonResult result;
//  has three possible values: NSOrderedSame,NSOrderedDescending, NSOrderedAscending
NSLog(@"selected date:%@ , today date: %@",newDate,today);
result = [today compare:newDate];
NSLog(@"result %d",result);
if(result==NSOrderedAscending)
{
    NSLog(@"big ascending");
    [AJNotificationView showNoticeInView:[[UIApplication sharedApplication] delegate].window
                                    type:AJNotificationTypeRed
                                   title:@"Birthdate should be less than today date."
                         linedBackground:AJLinedBackgroundTypeDisabled
                               hideAfter:GZAJNotificationDelay];
    return;

}
else if(result==NSOrderedDescending){
    NSLog(@"fine");
    [UIView animateWithDuration:0.25 delay:0.0 options: UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         // self.view.frame=CGRectMake(0, -30, 320, 200);
                         subview.frame=CGRectMake(0, 640, 320, 180);
                         //                             CGRect f1;
                         //                             f1=self.view.frame;
                         //                             f1.origin.y=f1.origin.y-100;
                         // self.view.frame=f1;
                         // v1.backgroundColor=[UIColor blackColor];
                     }
                     completion:^(BOOL finished){
                         if(finished)  {NSLog(@"Finished end !!!!!");}
                     }];
}

else{
    NSLog(@"same");
    [AJNotificationView showNoticeInView:[[UIApplication sharedApplication] delegate].window
                                    type:AJNotificationTypeRed
                                   title:@"Birthdate should be less than today date."
                         linedBackground:AJLinedBackgroundTypeDisabled
                               hideAfter:GZAJNotificationDelay];
    return;
}

Answer 1

试试这个-

NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat: @"MM-dd-yyyy"];
NSDate *date1 = [dateFormat dateFromString:firstDate];
NSDate *date2 = [dateFormat dateFromString:secondDate];

NSComparisonResult comparisonResult = [date1 compare:date2];

if(comparisonResult==NSOrderedAscending)
{
}
else if(comparisonResult ==NSOrderedDescending)
{
}
else
{
    // dates are same
}