时间戳的转换

NSString *string = myOderM.p_time;

    NSDate *date = [NSDate dateWithTimeIntervalSince1970:[string doubleValue]/1000];

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

    [dateFormatter setDateFormat:@"yyyy年MM月dd日 HH:mm:ss"];

    NSString *currenDateStr = [dateFormatter stringFromDate:date];

    self.timeLabel.text = currenDateStr;