// ClientEvent.ts
import { _decorator } from "cc";
const { ccclass, property } = _decorator;
@ccclass("ClientEvent")
export class ClientEvent {
private static _handlers: { [key: string]: any[] } = {};
/**
* 监听事件
* @param {string} eventName 事件名称
* @param {function} handler 监听函数
* @param {object} target 监听目标
*/
public static on (eventName: string, handler: Function, target: any) {
let objHandler: {} = { handler: handler, target: target };
let handlerList: Array<any> = ClientEvent._handlers[eventName];
if (!handlerList) {
handlerList = [];
ClientEvent._handlers[eventName] = handlerList;
}
for (let i = 0; i < handlerList.length; i++) {
if (!handlerList[i]) {
handlerList[i] = objHandler;
return i;
}
}
handlerList.push(objHandler);
return handlerList.length;
}
/**
* 取消监听
* @param {string} eventName 监听事件
* @param {function} handler 监听函数
* @param {object} target 监听目标
*/
public static off (eventName: string, handler: Function, target: any) {
let handlerList = ClientEvent._handlers[eventName];
if (!handlerList) {
return;
}
for (let i = 0; i < handlerList.length; i++) {
let oldObj = handlerList[i];
if (oldObj.handler === handler && (!target || target === oldObj.target)) {
handlerList.splice(i, 1);
break;
}
}
}
/**
* 分发事件
* @param {string} eventName 分发事件名
* @param {...any} params 分发事件参数
*/
public static dispatchEvent (eventName: string, ...args: any) {
let handlerList = ClientEvent._handlers[eventName];
let args1 = [];
let i;
for (i = 1; i < arguments.length; i++) {
args1.push(arguments[i]);
}
if (!handlerList) {
return;
}
for (i = 0; i < handlerList.length; i++) {
let objHandler = handlerList[i];
if (objHandler.handler) {
objHandler.handler.apply(objHandler.target, args1);
}
}
}
}
// 调用
import { ClientEvent } from './../framework/clientEvent';
……
// 我不理解这样是怎么实现监听和取消的的（难道是我漏看了哪里？）
ClientEvent.on(Constant.GAMEOVER_TYPE.GAME_WIN, this.gameWin, this);
ClientEvent.off(Constant.GAMEOVER_TYPE.GAME_WIN, this.gameWin, this);
希望各路大神指教！
