本示例使用[Emitter]实现事件的订阅和发布，使用[自定义弹窗]设置广告信息。
使用说明
HarmonyOS&OpenHarmony文档紫料添加v
mau123789直接拿取
entry/src/main/ets/
|---components
| |---BottomNavigation.ets // 底部按钮导航栏
| |---Choice.ets // 商品规格选择
| |---EventsDialog.ets // 广告弹窗
| |---Information.ets // 详细信息页面
| |---Valueation.ets // 价格页面
|---mock
| |---DetailData.ets // 商品详情数据
| |---ProductsData.ets // 产品列表数据
|---model
| |---DetailMode.ets // 商品详情数据结构
| |---GoodsModel.ets // 商品数据结构
|---pages
| |---Detail.ets // 商品详情
| |---Index.ets // 首页
| |---ShopCart.ets // 购物车
|---shoppingCart
| |---Cart.ets // 购物车
| |---FavorGoodlist.ets // 推荐列表
|---util
| |---Logger.ets // 日志工具
feature/emitter/src/main/ets/
|---common
| |---EmitterConst.ts // 事件通知常量
|---components
| |---feature
| | |---CustomEmitter.ets // 封装事件通知类
/*
* Copyright (c) 2022 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import emitter from '@ohos.events.emitter';
import { EmitterConst } from '../../common/EmitterConst';
import Base from '@ohos.base';
class GoodsListInner {
id: number = 0
}
class GoodsList {
data: GoodsListInner = {
id: 0
}
}
export class CustomEmitter {
shoppingCartGoodsList: GoodsList[] = [];
// 单次订阅回调
public showEventsDialog(callback: Base.Callback<emitter.EventData>) {
let dialogShowEventsId: emitter.InnerEvent = {
eventId: EmitterConst.DIALOG_EVENT_ID
};
let dialogShowEventsData: emitter.EventData = {
data: {
id: EmitterConst.DIALOG_EVENT_ID,
}
};
// 单次订阅事件--广告
emitter.once(dialogShowEventsId, callback);
// 事件发布
emitter.emit(dialogShowEventsId, dialogShowEventsData);
}
// 单次订阅回调(eventId为string类型)
public closeEventsDialog(callback: Base.Callback<emitter.EventData>) {
let dialogCloseEventsData: emitter.EventData = {
data: {
id: EmitterConst.CLOSE_DIALOG_EVENT_ID
}
};
// 单次订阅事件--关闭广告
emitter.once(EmitterConst.CLOSE_DIALOG_EVENT_ID, callback);
// 事件发布
emitter.emit(EmitterConst.CLOSE_DIALOG_EVENT_ID, dialogCloseEventsData);
}
// 持久化订阅的事件回调
public setShoppingCartGoodsList(callback: (eventData: emitter.EventData) => void) {
let addGoodDataId: emitter.InnerEvent = {
eventId: EmitterConst.ADD_EVENT_ID
};
// 以持久化方式订阅购物车添加事件并接收事件回调
emitter.off(EmitterConst.ADD_EVENT_ID);
emitter.on(addGoodDataId, (eventData: emitter.EventData) => {
callback(eventData);
});
}
// 持久化订阅的事件回调(eventId为string类型)
public deleteShoppingCartGoodsList(callback: (eventData: emitter.EventData) => void) {
// 以持久化方式订阅购物车删除事件并接收事件回调
emitter.off(EmitterConst.DELETE_EVENT_ID);
emitter.on(EmitterConst.DELETE_EVENT_ID, (eventData: emitter.EventData) => {
callback(eventData);
});
}
public addGoods(goodId: number) {
let addToShoppingCartId: emitter.InnerEvent = {
eventId: EmitterConst.ADD_EVENT_ID
};
let shoppingCartData: emitter.EventData = {
data: {
id: goodId
}
};
// 持续订阅发布事件
emitter.emit(addToShoppingCartId, shoppingCartData);
}
public deleteGoods(listItemId: number) {
console.info("setShoppingCartGoodsList goodId" + JSON.stringify(listItemId))
let shoppingCartData: emitter.EventData = {
data: {
id: listItemId,
}
};
// 持续订阅发布事件
emitter.emit(EmitterConst.DELETE_EVENT_ID, shoppingCartData);
}
// 以持久化方式订阅购物车购买事件
public listenerEvents() {
emitter.on(EmitterConst.BUY_EVENT_ID, (eventData: emitter.EventData) => {
});
}
// 获取购买事件订阅者数量并将结果返回
public getListenerCounts(callback: (counts: number) => void) {
callback(emitter.getListenerCount(EmitterConst.BUY_EVENT_ID));
}
// 取消订阅购买事件后将购买事件订阅者数量结果返回
public clearListenerCounts(callback: (counts: number) => void) {
emitter.off(EmitterConst.BUY_EVENT_ID);
callback(emitter.getListenerCount(EmitterConst.BUY_EVENT_ID));
}
}