Fix iOS Header/FooterView disappear

muak · Jan 25, 2024 · cd07e7b · cd07e7b
1 parent 4c586c0
commit cd07e7b
Show file tree

Hide file tree

Showing 2 changed files with 46 additions and 20 deletions.
diff --git a/Sample/Views/HeaderSurveyPage.xaml b/Sample/Views/HeaderSurveyPage.xaml
@@ -8,40 +8,66 @@
     Title="HeaderSurveyPage"
     x:DataType="vm:HeaderSurveyViewModel">
 
-    <sv:SettingsView>
+    <sv:SettingsView HasUnevenRows="True">
 
         <sv:Section>
-            <sv:Section.HeaderView>
-                <CheckBox IsChecked="{Binding IsShow.Value}" />
+            <sv:Section.HeaderView>                
+                <StackLayout Orientation="Horizontal" Spacing="0" Grid.Row="1">
+                    <CheckBox IsChecked="{Binding IsShow.Value}" 
+                                VerticalOptions="Center" WidthRequest="36"/>
+                    <Label Text="Agree"
+                            TextColor="Black"
+                            FontSize="16"
+                            VerticalOptions="Center" />
+                </StackLayout>
             </sv:Section.HeaderView>
         </sv:Section>
 
-        <sv:Section IsVisible="{Binding IsShow.Value}">
+        <sv:Section IsVisible="{Binding IsShow.Value}">               
+
             <sv:Section.HeaderView>
                 <HorizontalStackLayout>
-                    <BoxView WidthRequest="30" HeightRequest="30" Color="Bisque" />
+                    <BoxView WidthRequest="30" HeightRequest="30" Color="Red" />
                     <Label Text="Header" />
                 </HorizontalStackLayout>
             </sv:Section.HeaderView>
-            <sv:Section.FooterView>
-                <Label Text="Footer" />
-            </sv:Section.FooterView>
-            <sv:LabelCell Title="Hoge" ValueText="Abc" />
-            <sv:EntryCell Title="Input" />
+
+            <sv:PickerCell  />
+
         </sv:Section>
+
 
         <sv:Section IsVisible="{Binding IsShow.Value}">
+
             <sv:Section.HeaderView>
                 <HorizontalStackLayout>
-                    <BoxView WidthRequest="30" HeightRequest="30" Color="Red" />
+                    <BoxView WidthRequest="30" HeightRequest="30" Color="Bisque" />
                     <Label Text="Header" />
                 </HorizontalStackLayout>
             </sv:Section.HeaderView>
+
             <sv:Section.FooterView>
-                <Label Text="Footer" />
+                <ContentView>
+                    <Button 
+                            Text="Submit"                                
+                            Margin="32,32,32,8"
+                            />
+                </ContentView>
             </sv:Section.FooterView>
-            <sv:LabelCell Title="Fuga" ValueText="Xyz" />
-            <sv:EntryCell Title="Input" />
+
+           <sv:CustomCell IsMeasureOnce="False" IsSelectable="False"
+                            ShowArrowIndicator="False" UseFullSize="True"
+                            >
+                <Grid Padding="16,8,24,8">
+                    <Editor
+                        AutoSize="TextChanges"
+                        MinimumHeightRequest="80"
+                        MaxLength="300"
+                        Placeholder="Input your text"
+                         />
+                </Grid>
+            </sv:CustomCell>
+
         </sv:Section>
 
     </sv:SettingsView>

diff --git a/SettingsView/Platforms/iOS/CustomHeaderFooterView.cs b/SettingsView/Platforms/iOS/CustomHeaderFooterView.cs
@@ -158,7 +158,8 @@ public virtual void UpdateCell(View newCell,UITableView tableView)
 
         if(oldCell != null)
         {
-            oldCell.Handler?.DisconnectHandler();
+            // Do not disconnect the Handler here as it may not redraw.
+            //oldCell.Handler?.DisconnectHandler();
             oldCell.PropertyChanged -= CellPropertyChanged;
             oldCell.MeasureInvalidated -= OnMeasureInvalidated;
             // Delete previous child element
@@ -185,7 +186,7 @@ public virtual void UpdateCell(View newCell,UITableView tableView)
             handler = newCell.Handler as IPlatformViewHandler;
             // If the incoming Cell belongs to another parent, peel it off.
             handler.PlatformView?.RemoveFromSuperview();
-            ArrangeSubView(handler);
+            ArrangeSubView(handler);            
         }
         else
         {
@@ -200,13 +201,15 @@ public virtual void UpdateCell(View newCell,UITableView tableView)
         if (handlerType == viewHandlerType)
         {
             handler.SetVirtualView(_virtualCell);
+            System.Diagnostics.Debug.WriteLine("SetVirtualCell");
         }
         else
         {
             //when cells are getting reused the element could be already set to another cell
             //so we should dispose based on the renderer and not the renderer.Element
             handler.DisposeHandlersAndChildren();
             handler = GetNewHandler();
+            System.Diagnostics.Debug.WriteLine("Already set another cell");
         }        
 
         _virtualCell.MeasureInvalidated += OnMeasureInvalidated;        
@@ -230,10 +233,7 @@ public virtual void UpdateCell(View newCell,UITableView tableView)
 
         _heightConstraint = handler.PlatformView.HeightAnchor.ConstraintEqualTo(finalH);
         _heightConstraint.Priority = 999f;
-        _heightConstraint.Active = true;           
-
-        // TODO: 不要になったかも。
-        // Layout.LayoutChildIntoBoundingRegion(_virtualCell, new Rectangle(0, 0, finalW, finalH));
+        _heightConstraint.Active = true;
 
         handler.PlatformView.UpdateConstraintsIfNeeded();
     }