fix

src/views/tool.vue

@@ -303,16 +303,17 @@ export default {
           return
         }
         document.documentElement.scrollTop = document.body.scrollTop = 0
+        let me = this
         html2canvas(document.getElementById('posterOut'), {
           useCORS: true,
           backgroundColor:null,
           allowTaint: false
         }).then(canvas => {
-          this.posterUrl = canvas.toDataURL('image/png')
+          me.posterUrl = canvas.toDataURL('image/png')
           setTimeout(function(){
-            this.loadingShow = false
-            this.showPoster = true
-            this.createDialogShow = true
+            me.loadingShow = false
+            me.showPoster = true
+            me.createDialogShow = true
           },300)
         })
       }else{