fix: downloading in multi-pages

fix: cannot export video in some place

Pixiview.iOS/Pixiview.iOS.csproj

@@ -62,6 +62,7 @@
     <CodesignKey>iPhone Developer</CodesignKey>
     <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
     <MtouchUseLlvm>true</MtouchUseLlvm>
+    <MtouchExtraArgs>--optimize=experimental-xforms-product-type</MtouchExtraArgs>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Main.cs" />

Pixiview/Illust/ViewIllustPage.xaml.cs

@@ -382,7 +382,7 @@ namespace Pixiview.Illust
             }
 
             var item = items[index];
-            if (index > 0)
+            if (index > 0 && !force)
             {
                 if (item.Loading || item.Image != null)
                 {

Pixiview/Utils/Ugoira.cs

@@ -309,6 +309,7 @@ namespace Pixiview.Utils
                         {
                             frame.FilePath = file;
                             frames[i] = ImageSource.FromFile(file);
+                            frame.Incompleted = false;
                         }
                     }
                 }