update: 上传文件

src/directives/upload.js

@@ -41,7 +41,9 @@ function verificationPicFile(file, l_width, l_height) {
 
 export default {
   inserted: function(el, binding) {
-    el.addEventListener('change', function() {
+    el.addEventListener('change', function(e) {
+      if (e.target.value) binding.value.loading = true;
+      else return;
       binding.value.loading = true;
       const size = binding.value.limit && binding.value.limit.maxSize ? binding.value.limit.maxSize : 2; // 默认最大2M限制
       if (el.files[0].size > size * 1024 * 1024) {