Egret之MC逐帧动画

此处Egret逐帧动画借助Flash以及Texture Merger工具来生成文件（ 1：动画描述文件Json ， 动画图集文件 ）

本人以一只飞行的鸟为例

先看Flash ， 如下

flash的项目名称为 fly.fla

舞台帧信息 ， A 和 B为帧标签

打开texture merger ， 选择egret movieclip 。将fly.swf拖入到编辑区 ， 取名Bird ， 如下：

导出动画文件 ， json 和 png图集

为导出文件取名：

我们看看mc_test.json文件如下：

{"mc":{
 "fly":{
  "frameRate":24,
  "labels":[
   {"name":"A","frame":1,"end":3}
   ,{"name":"B","frame":4,"end":8}
   
   ],
  "events":[
   
   ],
  "frames":[
   
   {
   "res":"3E7A5975",
   "x":-67,
   "y":-24
   },
   {
   "res":"521E77D1",
   "x":-67,
   "y":-21
   },
   {
   "res":"4A0EE357",
   "x":-73,
   "y":-24
   },
   {
   "res":"34630D9E",
   "x":-71,
   "y":-36
   },
   {
   "res":"175B90A8",
   "x":-74,
   "y":-29
   },
   {
   "res":"4BC2B418",
   "x":-74,
   "y":-44
   },
   {
   "res":"A49D29C2",
   "x":-76,
   "y":-40
   },
   {
   "res":"B1A21F34",
   "x":-73,
   "y":-19
   }
   ]
}},
 "res":{
  "34630D9E":{"x":1,"y":1,"w":136,"h":77},
  "521E77D1":{"x":280,"y":62,"w":122,"h":61},
  "3E7A5975":{"x":142,"y":121,"w":123,"h":56},
  "4A0EE357":{"x":139,"y":1,"w":136,"h":59},
  "175B90A8":{"x":139,"y":62,"w":139,"h":57},
  "B1A21F34":{"x":267,"y":125,"w":139,"h":41},
  "A49D29C2":{"x":1,"y":121,"w":139,"h":53},
  "4BC2B418":{"x":277,"y":1,"w":136,"h":59}
 }}

解释如下：

在项目中实现此MC的播放

核心代码：

  protected childrenCreated():void{
   super.childrenCreated();
   this.txt_name.text = "Snow";
   this.img_dragon.source = RES.getRes("egret_icon_png");
   //this.playDragonEff();
            this.ayncLoad2Mc("mc_test_json");
  }
        private ayncLoad2Mc( resname : string) : void{
            var self = this;
            RES.getResAsync(resname,
                function(data: any,key: string): void {
                    if(key == "mc_test_json") {
                        self.ayncLoad2Mc("mc_test_png");
                    }
                    else if(key == "mc_test_png") {
                        this.playMC();
                    }
                },
                this);
        }
        private playMC() : void{
            var data2mc = RES.getRes("mc_test_json");
            var texture2mc = RES.getRes("mc_test_png");
            let mcFactory : egret.MovieClipDataFactory = new egret.MovieClipDataFactory(data2mc,texture2mc);
            let mc:egret.MovieClip = new egret.MovieClip(mcFactory.generateMovieClipData("fly"));
            mc.gotoAndPlay("A",-1);//"A" : 标签 -1 ： 循环播放
            this.addChild(mc);
            mc.x = 200;
            mc.y = 400;
        }

结果：

解释：

帧事件标签

mc.addEventListener(egret.MovieClipEvent.FRAME_LABEL,（e:egret.MovieClipEvent）=>{    console.log(e.type,e.frameLabel,mc.currentFrame);},this);

如 : 

{"mc":{
	"Battle_start":{
		"frameRate":12,
		"labels":[
			
			],
		"events":[
			 {"name":"@enemy","frame":8}
			],
		"frames":[

那么 : e.frameLabel == "@enemy"

注意 : {"name":"@enemy","frame":8}可以手写加上

每一轮循环播放完毕触发

mc.addEventListener(egret.Event.LOOP_COMPLETE, (e:egret.Event)=>{    console.log(e.type);}, this);

完全播放完毕触发

mc.addEventListener(egret.Event.COMPLETE, (e:egret.Event)=>{    console.log(e.type);}, this);