修复练习不能分享的问题

src/util.js

@@ -162,14 +162,29 @@ export const drawRoundImage = async (
   ctx.restore();
 };
 
+const loadImage = (src) =>
+  new Promise((resolve) => {
+    try {
+      uni.getImageInfo({
+        src,
+        success: (res) => resolve(res.path || res.tempFilePath || src),
+        fail: () => resolve(src),
+      });
+    } catch (e) {
+      resolve(src);
+    }
+  });
+
 export async function generateCanvasImage(canvasId, type, user, data) {
   try {
     var ctx = uni.createCanvasContext(canvasId);
     const width = 300;
     const height = 534;
     ctx.drawImage("../static/share-bg.png", 0, 0, width, height);
-    drawRoundImage(ctx, user.avatar, 17, 20, 32, 32, 20);
-    ctx.drawImage(user.lvlImage, 12, 15, 42, 42);
+    const avatar = await loadImage(user.avatar);
+    drawRoundImage(ctx, avatar, 17, 20, 32, 32, 20);
+    const lvlImage = await loadImage(user.lvlImage);
+    ctx.drawImage(lvlImage, 12, 15, 42, 42);
     renderText(ctx, user.nickName, 13, "#fff", 58, 34);
     renderRankTitle(ctx, user.lvlName);
 
@@ -239,6 +254,7 @@ export const wxShare = async (canvasId = "shareCanvas") => {
       path: res.tempFilePath,
     });
   } catch (error) {
+    console.log("生成图片失败:", error);
     uni.showToast({
       title: "生成图片失败",
       icon: "error",