LoadAsset的期间屏幕会出现红色的信息，但是过一会就好了

//这里面存放的是几个页面的网络布局URl和图片，颜色等等

import 'dart:convert';
import 'dart:ui';

import 'package:dio/dio.dart';
import 'package:helloworld/NetWork/service_url.dart';

class NavigationDao {
  static Future<Map<String, dynamic>> fetch() async {
    Response respone = await DiaoManager.getInstance().dio.get(
        "/init/Navigator",
        options: Options(responseType: ResponseType.json));
    if (respone.statusCode == 200) {
      Map jsonmap = respone.data;
      Autogenerated auto = Autogenerated.fromJson(jsonmap);
      ;

      return auto.toJson();
    }
  }
}

class Autogenerated {
  FloaingButton floaingButton;
  List<Navigation> navigation;

  Autogenerated({this.floaingButton, this.navigation});

  Autogenerated.fromJson(Map<String, dynamic> json) {
    floaingButton = json['FloaingButton'] != null
        ? new FloaingButton.fromJson(json['FloaingButton'])
        : null;
    if (json['Navigation'] != null) {
      navigation = new List<Navigation>();
      json['Navigation'].forEach((v) {
        navigation.add(new Navigation.fromJson(v));
      });
    }
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    if (this.floaingButton != null) {
      data['FloaingButton'] = this.floaingButton.toJson();
    }
    if (this.navigation != null) {
      data['Navigation'] = this.navigation.map((v) => v.toJson()).toList();
    }
    return data;
  }
}

class FloaingButton {
  String floaingNormalImage;
  int floaingNormalSize;
  Color floaingNormalColor;
  String floaingClickedImage;
  int floaingClickedSize;
  Color floaingClickedColor;
  List<SmallButton> smallButton;

  FloaingButton(
      {this.floaingNormalImage,
      this.floaingNormalSize,
      this.floaingClickedImage,
      this.floaingClickedSize,
      this.smallButton});

  FloaingButton.fromJson(Map<String, dynamic> json) {
    floaingNormalImage = json['FloaingNormalImage'];
    floaingNormalSize = json['FloaingNormalSize'];
    floaingNormalColor = Color(int.parse(json["FloaingNormalColor"]));
    floaingClickedImage = json['FloaingClickedImage'];
    floaingClickedSize = json['FloaingClickedSize'];
    floaingClickedColor = Color(int.parse(json["FloaingClickedColor"]));
    if (json['SmallButton'] != null) {
      smallButton = new List<SmallButton>();
      json['SmallButton'].forEach((v) {
        smallButton.add(new SmallButton.fromJson(v));
      });
    }
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['FloaingNormalImage'] = this.floaingNormalImage;
    data['FloaingNormalSize'] = this.floaingNormalSize;
    data['FloaingNormalColor'] = this.floaingNormalColor;
    data['FloaingClickedImage'] = this.floaingClickedImage;
    data['FloaingClickedSize'] = this.floaingClickedSize;
    data['FloaingClickedColor'] = this.floaingClickedColor;
    if (this.smallButton != null) {
      data['SmallButton'] = this.smallButton.map((v) => v.toJson()).toList();
    }
    return data;
  }
}

class SmallButton {
  String text;
  String imageUrl;
  int imageSize;

  SmallButton({this.text, this.imageUrl, this.imageSize});

  SmallButton.fromJson(Map<String, dynamic> json) {
    text = json['Text'];
    imageUrl = json['ImageUrl'];
    imageSize = json['ImageSize'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['Text'] = this.text;
    data['ImageUrl'] = this.imageUrl;
    data['ImageSize'] = this.imageSize;
    return data;
  }
}

class Navigation {
  String name;
  Color fontColor;
  int fontSize;
  String iamgeUrl;
  Color imageColor;
  int imageSize;

  Navigation(
      {this.name,
      this.fontColor,
      this.fontSize,
      this.iamgeUrl,
      this.imageColor,
      this.imageSize});

  Navigation.fromJson(Map<String, dynamic> json) {
    name = json['name'];
    fontColor = Color(int.parse(json['fontColor']));
    fontSize = json['fontSize'];
    iamgeUrl = json['iamgeUrl'];
    imageColor = Color(int.parse(json['imageColor']));
    imageSize = json['imageSize'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['name'] = this.name;
    data['fontColor'] = this.fontColor;
    data['fontSize'] = this.fontSize;
    data['iamgeUrl'] = this.iamgeUrl;
    data['imageColor'] = this.imageColor;
    data['imageSize'] = this.imageSize;
    return data;
  }
}