比较两个NSDate

- (BOOL)isTheSameDate:(NSDate *)date AnotherDate:(NSDate *)anotherDate
{
    if (date == nil || anotherDate == nil) return NO;
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"dd-MM-yyyy"];
    NSString *strDate = [dateFormatter stringFromDate:date];
    NSString *strAnotherDate = [dateFormatter stringFromDate:anotherDate];
    NSDate *dateA = [dateFormatter dateFromString:strDate];
    NSDate *dateB = [dateFormatter dateFromString:strAnotherDate];
    if ([dateA isEqualToDate:dateB]) {
        return YES;
    } else {
        return NO;
    }
}