bug fix

project.config.json

 	"miniprogramRoot": "dist/",
 	"projectname": "mini-chengjiao",
 	"description": "知与行联调",
-	"appid": "wxd9ee3a9480a4e544",
+	"appid": "wxd861316a7493c1ee",
 	"setting": {
 		"urlCheck": false,
 		"es6": false,

src/pages/im/index.js

       })
     }
 
-    this.setState({ msgList: list })
+    this.setState({ msgList: list }, this.toBottom)
   }
 
   handleIssueClick = (message, e) => {