Xamarin IOS SlideOver Kit SlideMenu不起作用

Question

我在IOS上使用slideoverkit幻灯片菜单时遇到问题。菜单显示时，它不显示标签文本，仅显示为：Slide Menu not working

它在android上完美运行。这是我的实现方式：

主详细页代码（.xaml）：

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;

public class JsonToPojo {
    public static void main(String[] args) {
        String json = getJson();

        GsonBuilder gsonBuilder = new GsonBuilder();

        JsonDeserializer<Example> deserializer = new JsonDeserializer<Example>() {

            @Override
            public Example deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
                    throws JsonParseException {
                Example example = new Example();
                JsonObject jsonObject = json.getAsJsonObject();
                example.setProject(jsonObject.getAsJsonObject("properties").getAsJsonObject("project")
                        .getAsJsonArray("projectList").get(0).getAsString());

                JsonObject subElementProperties = jsonObject.getAsJsonObject("properties").getAsJsonObject("students")
                        .getAsJsonObject("subelements").getAsJsonObject("properties");
                JsonArray idExamples = subElementProperties.getAsJsonObject("id").getAsJsonArray("examples");
                JsonArray depExamples = subElementProperties.getAsJsonObject("dep").getAsJsonArray("examples");
                List<Student> students = new ArrayList<Student>();
                for (int i = 0; i < idExamples.size(); i++) {
                    Student student = new Student();
                    student.setId(idExamples.get(i).getAsString());
                    student.setDep(depExamples.get(i).getAsString());
                    students.add(student);
                }
                example.setStudents(students);
                return example;
            }
        };
        gsonBuilder.registerTypeAdapter(Example.class, deserializer);

        Gson customGson = gsonBuilder.create();
        Example customObject = customGson.fromJson(json, Example.class);
        System.out.println(customObject.getStudents() + ", " + customObject.getProject());
    }

    private static String getJson() {
        return "{                                                  "
                + "  \"$id\": \"students.json\",                   "
                + "  \"type\": \"object\",                         "
                + "  \"properties\": {                             "
                + "    \"project\": {                              "
                + "      \"$id\": \"project\",                     "
                + "      \"projectList\": [                        "
                + "        \"ABC\"                                 "
                + "      ]                                         "
                + "    },                                          "
                + "    \"students\": {                             "
                + "      \"$id\": \"subproject\",                  "
                + "      \"type\": \"array\",                      "
                + "      \"subelements\": {                        "
                + "        \"properties\": {                       "
                + "          \"id\": {                             "
                + "            \"$id\": \"id\",                    "
                + "            \"examples\": [                     "
                + "              \"Y\"                             "
                + "            ]                                   "
                + "          },                                    "
                + "          \"dep\": {                            "
                + "            \"$id\": \"dep\",                   "
                + "            \"examples\": [                     "
                + "              \"X\"                             "
                + "            ]                                   "
                + "          }                                     "
                + "        },                                      "
                + "        \"required\": [                         "
                + "          \"id\",                               "
                + "          \"dep\"                               "
                + "        ]                                       "
                + "      }                                         "
                + "    }                                           "
                + "  },                                            "
                + "  \"required\": [                               "
                + "    \"project\"                                 "
                + "  ]                                             "
                + "}                                               ";
    }
}

这是我用于IOS的自定义渲染器（取自github slideoverkit）：

<t:SlideMenuView xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:menutest"
             x:Class="menutest.MainPage"
             BackgroundColor="White">

    <StackLayout>
        <StackLayout Orientation="Vertical" Spacing="0" >
            <Frame BackgroundColor="White" HeightRequest="50" HasShadow="False" >
                <Label TextColor="Black" Text="johnhastings@hotmail.com" VerticalOptions="End" FontSize="Medium" >

                </Label>
            </Frame>
            <BoxView HeightRequest="10" Color="Black"></BoxView>
            <Frame x:Name="client" BackgroundColor="White" HasShadow="False" >
                <Label TextColor="Black" Text="CLIENTS                                                                       ➤" >
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped" />
                    </Label.GestureRecognizers>
                </Label>
            </Frame>
            <BoxView HeightRequest="2" Color="Gray"/>
            <Frame BackgroundColor="White" HasShadow="False">
                <Label TextColor="Black" Text="WIZARD                                                                        ➤" >
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped" />
                    </Label.GestureRecognizers>
                </Label>
            </Frame>
            <BoxView HeightRequest="2" Color="Gray" />
            <Frame BackgroundColor="White" HasShadow="False">
                <Label TextColor="Black" Text="SETTINGS                                                                    ➤" >
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped" />
                    </Label.GestureRecognizers>
                </Label>
            </Frame>
            <BoxView HeightRequest="2" Color="Gray"/>
            <Frame BackgroundColor="White" HasShadow="False">
                <Label TextColor="Black" Text="GUIDES AND TEMPLATES                                       ➤" >
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped" />
                    </Label.GestureRecognizers>
                </Label>
            </Frame>
            <BoxView HeightRequest="2" Color="Gray"/>
            <Frame BackgroundColor="White" HasShadow="False">
                <Label TextColor="Black" Text="HELP                                                                             ➤" >
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped" />
                    </Label.GestureRecognizers>
                </Label>
            </Frame>
            <BoxView HeightRequest="2" Color="Gray"/>
            <Frame BackgroundColor="White" HasShadow="False">
                <Label TextColor="Black" Text="LOGOUT                                                                      ➤" >
                    <Label.GestureRecognizers>
                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped" />
                    </Label.GestureRecognizers>
                </Label>
            </Frame>
        </StackLayout>
    </StackLayout>

<t:SlideMenuView/>

代码没有任何问题。我也尝试了列表视图，但视单元格不显示标签文本，其他内容（如颜色）也正在显示。

谢谢。