删除saveImage方法的catch，排查生产环境ios不能保存图片的原因

utils/saveImage.js

@@ -7,19 +7,14 @@ export default async function saveImage(uri) {
   if (permission.granted) {
     const timestamp = new Date().getTime();
     const fileUri = FileSystem.cacheDirectory + `${timestamp}.png`;
-    try {
-      const res = await FileSystem.downloadAsync(uri, fileUri);
-      await MediaLibrary.saveToLibraryAsync(res.uri);
-      Toast.show({
-        type: "success",
-        text1: "已保存到相册",
-        topOffset: 60,
-      });
-      return true;
-    } catch (err) {
-      console.error("FS Err: ", err);
-      return false;
-    }
+    const res = await FileSystem.downloadAsync(uri, fileUri);
+    await MediaLibrary.saveToLibraryAsync(res.uri);
+    Toast.show({
+      type: "success",
+      text1: "已保存到相册",
+      topOffset: 60,
+    });
+    return true;
   } else {
     Toast.show({
       type: "error",