时间和时间戳相互转换

时间戳转时间字符串

    //timeStr服务器给的时间戳字符串
    NSDate * date = [NSDate dateWithTimeIntervalSince1970:[timeStr longLongValue]/1000.0];
    
    NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
    [fmt setDateStyle:NSDateFormatterMediumStyle];
    [fmt setTimeStyle:NSDateFormatterShortStyle];
    fmt.dateFormat = @"yyyy-MM-dd HH:mm";
    
    NSString *selfStr = [fmt stringFromDate:date];
    return selfStr;

时间字符串转时间戳

  //时间转时间戳的方法:
    NSString *timeSp = [NSString stringWithFormat:@"现在时间的时间戳%ld", (long)[datenow timeIntervalSince1970]];
    NSLog(@"timeSp:%@",timeSp); //时间戳的值