bug(h5): 修复带协议iconPath在h5无法显示问题

src/platforms/h5/components/app/tabBar.vue

 <template>
   <uni-tabbar :class="['uni-tabbar-'+position]">
-    <div
-      :style="{backgroundColor:backgroundColor}"
-      class="uni-tabbar"
+    <div
+      :style="{backgroundColor:backgroundColor}"
+      class="uni-tabbar"
     >
-      <div
-        :style="{backgroundColor:borderColor}"
-        class="uni-tabbar-border"
+      <div
+        :style="{backgroundColor:borderColor}"
+        class="uni-tabbar-border"
       />
-      <div
-        v-for="(item,index) in list"
-        :key="item.pagePath"
-        class="uni-tabbar__item"
-        @click="_switchTab(item,index)"
+      <div
+        v-for="(item,index) in list"
+        :key="item.pagePath"
+        class="uni-tabbar__item"
+        @click="_switchTab(item,index)"
       >
         <div class="uni-tabbar__bd">
-          <div
-            v-if="item.iconPath"
-            :class="{'uni-tabbar__icon__diff':!item.text}"
-            class="uni-tabbar__icon"
+          <div
+            v-if="item.iconPath"
+            :class="{'uni-tabbar__icon__diff':!item.text}"
+            class="uni-tabbar__icon"
           >
             <img :src="_getRealPath($route.meta.pagePath===item.pagePath?item.selectedIconPath:item.iconPath)">
-            <div
-              v-if="item.redDot"
-              :class="{'uni-tabbar__badge':!!item.badge}"
-              class="uni-tabbar__reddot"
+            <div
+              v-if="item.redDot"
+              :class="{'uni-tabbar__badge':!!item.badge}"
+              class="uni-tabbar__reddot"
             >
               {{ item.badge }}
             </div>
           </div>
-          <div
-            v-if="item.text"
+          <div
+            v-if="item.text"
             :style="{color:$route.meta.pagePath===item.pagePath?selectedColor:color,fontSize:item.iconPath?'10px':'14px'}"
-            class="uni-tabbar__label"
+            class="uni-tabbar__label"
           >
             {{ item.text }}
-            <div
-              v-if="item.redDot&&!item.iconPath"
-              :class="{'uni-tabbar__badge':!!item.badge}"
-              class="uni-tabbar__reddot"
+            <div
+              v-if="item.redDot&&!item.iconPath"
+              :class="{'uni-tabbar__badge':!!item.badge}"
+              class="uni-tabbar__reddot"
             >
               {{ item.badge }}
             </div>
@@ -228,9 +228,6 @@ export default {
   },
   methods: {
     _getRealPath (filePath) {
-      if (filePath.indexOf('/') !== 0) {
-        filePath = '/' + filePath
-      }
       return getRealPath(filePath)
     },
     _switchTab ({
@@ -259,4 +256,4 @@ export default {
     }
   }
 }
-</script>
+</script>