完善提示

src/pages/my-device.vue

@@ -22,14 +22,22 @@ const handleScan = () => {
     onlyFromCamera: true,
     scanType: ["qrCode"],
     success: async (res) => {
-      const base64Decode = (str) => {
-        // 将 base64 转换为 utf8 字符串
-        const bytes = wx.base64ToArrayBuffer(str);
-        return String.fromCharCode.apply(null, new Uint8Array(bytes));
-      };
+      try {
+        const base64Decode = (str) => {
+          // 将 base64 转换为 utf8 字符串
+          const bytes = wx.base64ToArrayBuffer(str);
+          return String.fromCharCode.apply(null, new Uint8Array(bytes));
+        };
 
-      addDevice.value = JSON.parse(base64Decode(res.result));
-      confirmBindTip.value = true;
+        addDevice.value = JSON.parse(base64Decode(res.result));
+        confirmBindTip.value = true;
+      } catch (err) {
+        uni.showToast({
+          title: "无效二维码",
+          icon: "none",
+          duration: 2000,
+        });
+      }
     },
     fail: (err) => {
       console.error("扫码失败：", err);