打印报错 二维码 一维码么数据报错问题

app/Services/LabelService.php

@@ -142,6 +142,9 @@ class LabelService {
             foreach($yiweimaits as $k=>$yiweimait){
                 try{
                     $a = $yiweimait->style;
+                    if(empty($yiweimait->datatypes)){
+                        $yiweimait->datatypes = "暂无数据";
+                    }
                     $b = 'data:image/png;base64,' . DNS1D::getBarcodePNG($yiweimait->datatypes, "C128");
                     $c =  preg_replace('/background: url\((.*?)\) 0% 0% \/ 100% 100%/'," background: url({$b}) 0% 0% / 100% 100% ",$a);
                     $yiweimait->style = $c;
@@ -154,6 +157,9 @@ class LabelService {
             foreach($erweimas as $k=>$erweima){
                 try{
                     $a =$erweima->style;
+                    if(empty($erweima->datatypes)){
+                        $erweima->datatypes = "暂无数据";
+                    }
                     $b = 'data:image/png;base64,' . DNS2D::getBarcodePNG($erweima->datatypes, "QRCODE");
                     $c =  preg_replace('/background: url\((.*?)\) 0% 0% \/ 100% 100%/'," background: url({$b}) 0% 0% / 100% 100% ",$a);
                     $erweima->style = $c;