添加自动打印逻辑

src/views/design/main/index.vue

@@ -529,10 +529,11 @@ export default {
     },
     getBackFile({ files, size }, callback) {
       let that = this;
-      let bw = document.getElementById("line").clientWidth;
-      // let bw = window.getComputedStyle(
+      let bw = window.getComputedStyle(
         document.getElementsByClassName("grid")[0]
       ).width;
+      bw = Number(bw.replace("px", ""));
+
       // bw = Number(bw.replace("px", ""));
       for (let i = 0; i < files.length; i++) {
         files[i].url = files[i].productionFile || files[i].url;