+(NSString *)dateStyle:(NSString *)date{        NSString *invalidTime=[NSString stringWithFormat:@"%f",[date  doubleValue]/1000];//时间戳         NSTimeInterval effectTime=[invalidTime doubleValue]+28800;//因为时差问题要加8小时 == 28800        NSDate *effectDate=[NSDate dateWithTimeIntervalSince1970:effectTime];    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];    [dateFormatter setDateFormat:@"yyyy-MM-dd"];        NSString *effectDateStr = [dateFormatter stringFromDate: effectDate];    return effectDateStr;}