cocos creator 中使用 mobx 的一个工具

yarn install mobx-cocos

使用说明

import { observer, render, reactor, react } from "mobx-cocos";
import { action, observable } from "mobx";
class ComponentStore {
  @observable public array: number[] = [0, 1, 2];
  @observable public counter = 0;
  @observable public shadowCounter = this.counter;
}
const store = new ComponentStore();
/**
 * 由 @observer 注解的类, 会将 @render 和 @reactor 所注解的方法 纳入生命周期来管理
 */
@ccclass
@observer
export class Component extends cc.Component {
  @observable private index = 0;
  protected onLoad(){
    // 没间隔1秒钟增加this.index
    this.schedule(this.addIndex, 1);
  }
  // @render 注解的方法会在 onLoad执行之后自动调用一次, 并在 counter每次发生变化的时候执行
  @render protected renderCounter(){
    console.log("store.counter = " + store.counter);
  }

  // 监听 store.shadowCounter
  @render protected renderShadowCounter(){
    console.log("store.shadowCounter = " + store.shadowCounter0);
  }

  // 监听 store.array[this.index % store.array.length] 的数值, 来修改 store.counter的数值
  @reactor
  protected componentCounterReactor(){
    return react(()=> store.array[this.index % store.array.length], (value)=> store.counter = value);
  }

  /**
   * 如下方式的简写
   * @reactor fn(){ 
   *    return react(()=> store.counter, (v)=> store.shadowCounter = v)
   * }
   */
  @reactor(()=> store.counter)
  protected counterReactor(counter: number){
    store.shadowCounter = counter;
  }

  @action private addIndex(){
    store.index++;
  }
}