fix ios init error and view log auto scroll back

lib/basic/config/DownloadAndExportPath.dart

@@ -10,7 +10,12 @@ import '../Method.dart';
 late String _downloadAndExportPath;
 
 Future initDownloadAndExportPath() async {
+  if (Platform.isWindows ||
+      Platform.isMacOS ||
+      Platform.isAndroid ||
+      Platform.isLinux) {
     _downloadAndExportPath = await method.loadDownloadAndExportPath();
+  }
 }
 
 Widget downloadAndExportPathSetting() {

lib/screens/ViewLogsScreen.dart

@@ -164,9 +164,8 @@ class ViewLogWrap extends StatelessWidget {
     var size = MediaQuery.of(context).size;
     var min = size.width < size.height ? size.width : size.height;
     var width = (min - 45) / 4;
-    return Wrap(
+
-      alignment: WrapAlignment.spaceAround,
+    var entries = comics.map((e) {
-      children: comics.map((e) {
       return InkWell(
         key: e.key,
         onTap: () {
@@ -199,7 +198,25 @@ class ViewLogWrap extends StatelessWidget {
           ),
         ),
       );
-      }).toList(),
+    });
+
+    Map<int, List<Widget>> map = Map();
+    for (var i = 0; i < entries.length; i++) {
+      late List<Widget> list;
+      if (i % 4 == 0) {
+        list = [];
+        map[i ~/ 4] = list;
+      } else {
+        list = map[i ~/ 4]!;
+      }
+      list.add(entries.elementAt(i));
+    }
+
+    return Column(
+      children: map.values.map((e) => Wrap(
+            alignment: WrapAlignment.spaceAround,
+            children: e,
+          )).toList(),
     );
   }
 }