cocos creator Touch事件应用(触控选择多个子节点的实例)

cc.Class({
 extends: cc.Component,

 properties: {
  // foo: {
  // default: null,  // The default value will be used only when the component attaching
  //       to a node for the first time
  // url: cc.Texture2D, // optional, default is typeof default
  // serializable: true, // optional, default is true
  // visible: true,  // optional, default is true
  // displayName: 'Foo', // optional
  // readonly: false, // optional, default is false
  // },
  // ...
   poker:{
    default:null,
    type:cc.Node
   },
   cardMask:{
    default:null,
    type: cc.Prefab
   }
 },

 // use this for initialization
 onLoad: function () {
   
   //牌
   this.cards = this.poker.children;

   //牌初始位置
   this.cardInitY = this.cards[0].y;

   //触摸选择到的牌
   this.touchedCards = [];

   //选中的牌
   this.selectedCards = [];

   console.info(this.cards);
  },
  
  start: function () {
   // this.cards = this.poker.children;
   // console.info(this.cards);
   
   this.addTouchEvent();
  },

  /**
   * 添加事件
   */
  addTouchEvent:function(){

   //父节点监听touch事件（直接子节点必须注册同样的事件方能触发）
   this.poker.on(cc.Node.EventType.TOUCH_START, function (event) {
    console.log('poker TOUCH_START');
    
    //牌
    var card = event.target;
    
    //起始触摸位置（和第一张card一样，相对于poker的位置）
    this.touchStartLocation = this.cards[0].convertTouchToNodeSpace(event);
    console.log('touch start Location:'+ JSON.stringify(this.touchStartLocation));
    
    //计算牌位置
    var index = 0;
    for(var i=0;i<this.cards.length;i++){
     var c = this.cards[i];
     if(c.name == card.name){
      index = i;
      break;
     }
    }

    //暂存第一次触摸到的牌
    var touchedCard = {
     index:index,
     card:card
    };
    this.firstTouchedCard = touchedCard;
    //暂存
    this.pushTouchedCards(touchedCard.index,touchedCard.card);

   }, this);
  
   //父节点监听touch事件（直接子节点必须注册同样的事件方能触发）
   this.poker.on(cc.Node.EventType.TOUCH_MOVE, function (event) {
    console.log('poker TOUCH_MOVE');
    //先清除原先触摸到的牌
    this.clearTouchedCards();
    //保存第一张牌
    this.pushTouchedCards(this.firstTouchedCard.index,this.firstTouchedCard.card);

    //触摸点转换为card节点坐标
    var nodeLocation = this.cards[0].convertTouchToNodeSpace(event);
    console.log('touch nodeLocation:'+ JSON.stringify(nodeLocation));
    var x = nodeLocation.x;
    var y = nodeLocation.y; 

    //找到当前选中的牌
    var currentCard = null;
    for(var i=0;i< this.cards.length;i++){
     var card = this.cards[i];
     var cardX = card.x;
     var cardY = card.y;
     console.log('card x='+cardX+',y='+cardY);


     //某张牌范围包括了鼠标位置，选中此牌与触摸开头的所有牌
     var cardWidth = i==5 "selected cards is: "+ JSON.stringify(this.selectedCards));
 },

 
 // called every frame, uncomment this function to activate update callback
 // update: function (dt) {

 // },
});