modify username in poster page

src/components/sharePoster/index.js

@@ -23,6 +23,7 @@ class SharePoster extends Component {
     componentDidMount() {
         this.getCodeWe();
         http.get(`${API.home}/m/dist/posters/${getParam('courseId')}/${getParam('uid')}`).then((res) => {
+            console.log(res);
             if (res.data.code === 200) {
                 this.setState({
                     imgUrl: res.data.data.avatar,
@@ -58,7 +59,7 @@ class SharePoster extends Component {
 
         var canvas = document.getElementById("canvas"),
             context = canvas.getContext("2d");
-
+        console.log(_this);
         _this.getBase64(imgSrc1)
         // 背景图片合成
             .then((img) => {
@@ -84,7 +85,7 @@ class SharePoster extends Component {
                     context.drawImage(qrCodeImg, 320, 685, 100, 100);
                     context.fillStyle = imgList[index].username_color;
                     context.font = "16px serif";
-                    context.fillText('@' + _this.name, (avatarPositionX + avatarWidth) + 20, (avatarPositionY + avatarHeight / 2));
+                    context.fillText('@' + _this.state.name, (avatarPositionX + avatarWidth) + 20, (avatarPositionY + avatarHeight / 2));
                     context.font = "14px serif";
                     context.fillText('正在学习该课程', (avatarPositionX + avatarWidth) + 20, (avatarPositionY + avatarHeight / 2) + 20);
                     context.restore();