CocosCreator动态加载预制体

目前有两个办法加载预制体，一个是动态加载，一个是放到scene上

动态加载

    showTip(str){
        //我們先動態取得Canvas
        var CanvasNode = cc.find( 'Canvas' );
        if( !CanvasNode ) { cc.log( 'find Canvas error' ); return; } 
       
        var onResourceLoaded = function(errorMessage, loadedResource )
        {
           
            if( errorMessage ) { cc.log( 'Prefab error:' + errorMessage ); return; }
            if( !( loadedResource instanceof cc.Prefab ) ) { cc.log( 'Prefab error' ); return; } 
            
            var newMyPrefab = cc.instantiate( loadedResource );
            
            CanvasNode.addChild( newMyPrefab );
            
            newMyPrefab.setPosition( 0, 0 );
            
            var newMyPrefabScript = newMyPrefab.getComponent( 'showTips' );
            

            newMyPrefabScript.setLabelString(str );
        };
        cc.loader.loadRes('prefabs/tips', onResourceLoaded );
    }

静态加载

将预制体拖入scene中，在预制体的onload中，将自己加入window

    onLoad:function () {
        cc.log("showTips.onLoad")
        window.showtips = this;

        // 初始化计时器
        this.timer = 0;
        this.node.active = this._isShow;
    },

接下来使用就很方便了

       window.showtips.run("aaa")

预制体代码如下:

// Learn cc.Class:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/class.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/class.html
// Learn Attribute:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/life-cycle-callbacks.html
//  - [English] https://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html

cc.Class({
    extends: cc.Component,

    properties: {
        Text: { default: null, type: cc.Label },
        showTimes: 1, //隐藏时间
        jumpHeight: 100, //跳跃高度
        _isShow:false,
    },

    // LIFE-CYCLE CALLBACKS:
    setLabelString: function( str )
    {
        //這邊直接將我們的Label字串設定為 No.#
        this.Text.string = ( str );
    },


    onLoad:function () {
        cc.log("showTips.onLoad")
        window.showtips = this;

        // 初始化计时器
        this.timer = 0;
        this.node.active = this._isShow;
    },
    setJumpAction: function () {
        this.timer = 0;
        // 跳跃
        var jumpDown = cc.moveBy(this.showTimes, cc.v2(0, this.jumpHeight)).easing(cc.easeCubicActionIn());
        var callback = cc.callFunc(this.finish, this);
        return cc.repeat(cc.sequence(jumpDown,callback),1);
    },
    finish:function(){
        this._isShow = false;
        if(this.node){
            this.node.active = this._isShow;   
        }
        this.node.stopAllActions();
        this.node.destroy();
    },
    start:function () {
        cc.log("showTips.start")
    },
    run:function (str) {
        this._isShow = true;
        if(this.node){
            this.node.active = this._isShow;   
        }
        this.setLabelString(str)
        this.jumpAction = this.setJumpAction();
        this.node.runAction(this.jumpAction);
    },
    update:function (dt) {
        var opacityRatio = 1 - this.timer/this.showTimes;
        var minOpacity = 50;
        this.node.opacity = minOpacity + Math.floor(opacityRatio * (255 - minOpacity));
        
        if (this.timer > this.showTimes) {
            this.finish();
            return;
        }
        this.timer += dt;

    },
});