modify

@@ -485,7 +485,7 @@ export default {
     directives: {
     // 处理加减天数
     "input-filter": {
-      bind: function (el, binding) {
+      bind: function (el, binding, { context }) {
         el.handler = function (event) {
           if (event.data == "E" || event.data == "e") {
             // 无理数时

@@ -501,7 +501,7 @@ export default {
   directives: {
     // 处理加减天数
     "input-filter": {
-      bind: function (el, binding) {
+      bind: function (el, binding, { context }) {
         el.handler = function (event) {
           if (event.data == "E" || event.data == "e") {
             // 无理数时
@@ -510,10 +510,10 @@ export default {
           if (event.target.value) {
             if (Number(event.target.value) < -7) {
               event.target.value = "";
-              this.msgError("加减天数最小不能低于7天");
+              context.msgError("加减天数最小不能低于7天");
             } else if (Number(event.target.value) > 7) {
               event.target.value = "";
-              this.msgError("加减天数最小不能大于7天");
+              context.msgError("加减天数最小不能大于7天");
             } else if (/[\.]/.test(Number(event.target.value))) {
               // 浮点数时
               event.target.value = "";