24867 描述页面默认提示语修改

public/react/src/modules/courses/shixunHomework/Homeworddescription.js

@@ -65,6 +65,8 @@ class Homeworddescription extends Component {
     }
     //获取输入框
     settextarea=(e)=>{
+			console.log("settextarea");
+			console.log(e);
         this.setState({
             description:e
         })
@@ -89,8 +91,10 @@ class Homeworddescription extends Component {
                         {/*<TextArea  placeholder="作业说明..." value={this.state.description} onInput={this.settextarea} style={{"height": "120px"}}/>*/}
                             {/*<TextArea style={{"height": "120px"}}*/}
                             {/*          autoComplete="off" ></TextArea>*/}
-                        <TPMMDEditor ref={this.mdRef} placeholder={'请输入作业说明'}
+											<TPMMDEditor ref={this.mdRef} placeholder={'请在此输入作业内容和要求，最大限制5000个字符'}
-                                     mdID={'courseMessageMD'} initValue={this.state.description}   className="courseMessageMD" onChange={this.settextarea} style={{"height": "120px"}}></TPMMDEditor>
+																	 mdID={'courseMessageMD'} initValue={this.state.description}
+																	 className="courseMessageMD" onChange={this.settextarea} style={{"height": "120px"}}
+																	 maxLent={"5000"}></TPMMDEditor>
                     </Form.Item>
                     <div className="clearfix mt10">
                             <Button  type="primary" className="defalutSubmitbtn  fr mr20 "style={{"width":"90px"}} onClick={this.onSaveExercise} >保存</Button>