Merge branch 'iteration_header_to_h5' into jenkins

src/school/save-share-image/index.tsx

@@ -234,7 +234,7 @@ export default defineComponent({
     }
     return () => (
       <div class={[styles.saveShareImage]}>
-        <OHeader background="transparent" style="position: fixed; width: 100%;">
+        <OHeader background="transparent" style="position: fixed; width: 100%;z-index: 999">
           {{
             content: () => (
               <div class={styles.btnHeader} onClick={onBack}>