PHPExcel导出乱码问题

$objPHPExcel = new PHPExcel();
            $objPHPExcel->getProperties()->setTitle("定制车专题用户意向");
            //设置当前的sheet
            $objPHPExcel->setActiveSheetIndex(0);
            //设置sheet的name
            $objPHPExcel->getActiveSheet()->setTitle(mb_convert_encoding(‘用户意向‘, ‘utf-8‘, ‘gbk‘));

            $titleArr = array(
                ‘A1‘ => ‘购车人姓名‘,
                ‘B1‘ => ‘购车人电话‘,
                ‘C1‘ => ‘车型‘,
                ‘D1‘ => ‘颜色‘,
                ‘E1‘ => ‘所选配件‘,
                ‘F1‘ => ‘购车省份‘,
                ‘G1‘ => ‘购车城市‘,
                ‘H1‘ => ‘预计提车时间‘,
                ‘I1‘ => ‘创建时间‘,
            );
            foreach ($titleArr as $k => $v) {
                $objPHPExcel->getActiveSheet()->setCellValue($k, mb_convert_encoding($v, ‘utf-8‘, ‘gbk‘));
            }
            $i = 2;
            foreach ($res as $item) {
                //设置单元格的值
                $objPHPExcel->getActiveSheet()->setCellValue(‘A‘ . $i, $item[‘name‘]);
                $objPHPExcel->getActiveSheet()->setCellValue(‘B‘ . $i, $item[‘phone‘]);
                $objPHPExcel->getActiveSheet()->setCellValue(‘C‘ . $i, $item[‘carModuel‘]);
                $objPHPExcel->getActiveSheet()->setCellValue(‘D‘ . $i, $item[‘color‘]);
                $objPHPExcel->getActiveSheet()->setCellValue(‘E‘ . $i, $item[‘parts‘]);
                $objPHPExcel->getActiveSheet()->setCellValue(‘F‘ . $i, $item[‘province‘]);
                $objPHPExcel->getActiveSheet()->setCellValue(‘G‘ . $i, $item[‘city‘]);
                $objPHPExcel->getActiveSheet()->setCellValue(‘H‘ . $i, mb_convert_encoding($item[‘takeoutTime‘] == 0 ? "一个周内" : $item[‘takeoutTime‘] == 1 ? "一个月内" : "三个月内", ‘utf-8‘, ‘gbk‘));
                $objPHPExcel->getActiveSheet()->setCellValue(‘I‘ . $i, empty($item[‘insertTime‘]) ? "--" : date(‘Y-m-d‘, $item[‘insertTime‘]));
                $i++;
            }
            $fileName = sprintf("定制车专题用户意愿%s.xls", date(‘Y-m-dHi‘));
//            $objWriter->save($fileName);
//            直接输出到浏览器
//            $objWriter = new PHPExcel_Writer_Excel5($objPHPExcel);
            header("Pragma: public");
            header("Expires: 0");
            header("Cache - Control:must - revalidate, post - check = 0, pre - check = 0");
            header("Content-Type:application/force-download");
            header("Content-Type:application/vnd.ms-execl");
            header("Content-Type:application/octet-stream");
            header("Content-Type:application/download");;
            header(sprintf(‘Content-Disposition:attachment;filename="%s"‘, $fileName));
            header("Content-Transfer-Encoding:binary");
            $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, ‘Excel5‘);
            $objWriter->save(‘php://output‘);