引入math.js改

DAPlatform-front/src/components/imageAnnotation/imageAnnotiation.vue

@@ -404,7 +404,8 @@ export default {
     goBigger () {
       var scale = this.scaleSize
       if (scale < 2) {
-        this.scaleSize = scale + 0.1
+        // this.scaleSize = scale + 0.1
+        this.scaleSize = this.$math.add(this.$math.bignumber(scale), this.$math.bignumber(0.1))
       } else {
         this.scaleSize = 2
       }
@@ -418,7 +419,7 @@ export default {
     goSmaller () {
       var scale = this.scaleSize
       if (scale > 0.5) {
-        this.scaleSize = scale - 0.1
+        this.scaleSize = this.$math.subtract(this.$math.bignumber(scale), this.$math.bignumber(0.1))
       } else {
         this.scaleSize = 0.5
       }

DAPlatform-front/src/main.js

@@ -8,6 +8,9 @@ import ElementUI from 'element-ui'
 import 'element-ui/lib/theme-chalk/index.css'
 import axios from 'axios'
 import VueAxios from 'vue-axios'
+import * as math from 'mathjs';
+
+Vue.prototype.$math = math
 
 axios.defaults.baseURL = 'http://localhost:9100/api'
 axios.defaults.timeout = 8000