revert 40f99064c6

revert 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

@@ -7,14 +7,19 @@ export default async function saveImage(uri) {
   if (permission.granted) {
     const timestamp = new Date().getTime();
     const fileUri = FileSystem.cacheDirectory + `${timestamp}.png`;
-    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;
+    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;
+    }
   } else {
     Toast.show({
       type: "error",