小编cah*_*why的帖子

我想CheckboxListTile在这个小部件对话框中构建一个复选框，但是当我点击复选框时，复选框checked上的复选框不会改变。

这是我的代码：

Future<Null> _showGroupDialog(BuildContext context) async {
    await showDialog(
        context: context,
        builder: (BuildContext dialogContext) =>
            Dialog(child: _buildCheckboxGroups(context)));
}

Widget _buildCheckboxGroups(BuildContext context) {
    List<Widget> childrens = List.generate(_groups.length, (index) {
      return CheckboxListTile(
        title: Text(_groups[index].name),
        value: _groups[index].checked,
        onChanged: (bool val) {
          setState(() {
            _groups[index].checked = val;
          });
        },
      );
    });

    return Container(
        child: Column(
      mainAxisSize: MainAxisSize.min,
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: childrens,
    ));
}

顺便说一句，onChange当我点击复选框时会调用该方法。任何人都可以解决这个问题吗？

我只是想在 vuex 中创建动态注册模块，但它似乎不起作用。这是我的商店文件

import Vuex from 'vuex'
import descriptionModule from './module/descriptionModule';
const {state: stateModule, getters, mutations} = descriptionModule;

const createStore = () => {
  return new Vuex.Store({
    state: {
      descriptions: [],
    },
    mutations: {
      addDescriptions(state, payload){
        state.descriptions.push(state.descriptions.length + 1);
        createStore().registerModule(`descriptionModule${payload}`, {
          state: stateModule,
          getters,
          mutations,
          namespaced: true // making our module reusable
        });
      }
    }
  })
};

export default createStore

这是我将注册的自定义模块

const state = () => {
  return {description: ''}
};
const getters = {
  description: (state) => state.description
}; …

我想通过lat和lng从灰烬组件到另一个组件的余烬(g-map).我的车把模板:

  {{!-- Index.hbs --}}
  <div class="jumbotron-outside">
  <div class="jumbotron">
    <h1 class="display-3">See The Weather Outside :)</h1>
    <p class="lead">This is a simple forecast weather.</p>
    <hr class="my-4">
    <p>Just type everything bellow this input text to get all list of the city</p>
    {{text-autocomplete}}
    <p class="lead">
      <button class="btn btn-primary btn-default" href="#" role="button" disabled={{isDisabled}}>Search</button>
    </p>
  </div>
  {{g-map lat=lat lng=lng zoom=zoom}}
</div>

这是我的text-autocomplete组件:

// text-autocomplete/component.js
import Ember from 'ember';

let lat;
let lng;
export default Ember.Component.extend({
    didInsertElement() { //dom can be acessed …

我已经使用 react-native-map air bnb 在我的本机应用程序中渲染谷歌地图。地图和标记显示出来，但标记不能拖动。这是我的脚本

<View style={Style.mapContainer}>
            <GeoLocation onSetInitalPos={this.onSetInitialPosition}
                         onSetLastPos={this.onSetLastPosition}/>
            <MapView style={Style.map} region={this.state.region} onRegionChange={this.onRegionChange}>
                <MapView.Marker draggable={this.state.draggable}
                                coordinate={this.state.marker.latlng}
                                title={this.state.marker.title}
                                description={this.state.marker.description}
                                onDrag={() => console.log('onDrag')}
                />
            </MapView>
            <AutoCompleteMap onSetNewPlace={this.setMarkerPosition}/>
        </View>