新增 新增、编辑立减金商品，在使用说明中展示限制长度

src/components/knockGold/index.less

@@ -329,3 +329,16 @@
 		display: none;
 	}
 }
+
+.countBox_par {
+	position: relative;
+	display: inline-block;
+
+	.countBox {
+		position: absolute;
+		color: #999;
+		bottom: 5%;
+		z-index: 999999;
+		right: 3%;
+	}
+}

src/components/knockGold/wangEditor.jsx

@@ -1,10 +1,12 @@
 import React from 'react'
 import Editor from 'wangeditor'
+import './index.less'
 export default class wangeditor extends React.Component {
   constructor(props) {
     super(props)
     this.state = {
-      editorHtml: ''
+      editorHtml: '',
+      count: 0
     }
   }
   componentDidMount() {
@@ -39,6 +41,7 @@ export default class wangeditor extends React.Component {
         self.props.setEdittext(str)
         return
       }
+      self.setState({ count: text.length })
       self.setState({ editorHtml: newHtml })
       self.props.setEdittext(newHtml)
     }
@@ -49,6 +52,11 @@ export default class wangeditor extends React.Component {
   }
 
   render() {
-    return <div id='wangeditorDom' style={{ width: this.props.width }}></div>
+    return (
+      <div className='countBox_par'>
+        <div id='wangeditorDom' style={{ width: this.props.width }}></div>
+        <p className='countBox'>{this.state.count + '/' + 500}</p>
+      </div>
+    )
   }
 }