iOS判断两个时间戳是否同一天

- (BOOL)isSameDay:(long)iTime1 Time2:(long)iTime2
{
    //传入时间毫秒数
    NSDate *pDate1 = [NSDate dateWithTimeIntervalSince1970:iTime1/1000];
    NSDate *pDate2 = [NSDate dateWithTimeIntervalSince1970:iTime2/1000];
    NSCalendar* calendar = [NSCalendar currentCalendar];
    unsigned unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay;
    NSDateComponents* comp1 = [calendar components:unitFlags fromDate:pDate1];
    NSDateComponents* comp2 = [calendar components:unitFlags fromDate:pDate2];
    
    return [comp1 day]   == [comp2 day] &&
    [comp1 month] == [comp2 month] &&
    [comp1 year]  == [comp2 year];
}