runAction函数也会缩放精灵的子节点,但不会淡化它们

时间:2015-03-31 07:15:40

标签: animation sprite cocos2d-js

我用sprite创建一个菜单,并为每个sprite添加一个标签。

var items = [],
for( var i=0 ; i<players.length ; i++ ) {

    var frame = cc.spriteFrameCache.getSpriteFrame("listviewitem"),
    spritesNormal = cc.Sprite.create(frame,cc.rect(0,0,380,100)),
    spritesSelected =cc.Sprite.create(frame,cc.rect(0,0,380,100)),
    spritesDisabled =cc.Sprite.create(frame,cc.rect(0,0,380,100));

    var label = cc.LabelBMFont.create( players[i].name , "res/fonts/bees50.fnt" , cc.LabelAutomaticWidth, cc.TEXT_ALIGNMENT_CENTER, cc.p(0, 0) );               
    spritesNormal.addChild(label, 5);   

    var listviewSprite = new cc.MenuItemSprite(spritesNormal, spritesSelected, spritesDisabled, this.onListviewTap, { self: this, player: players[i] });       
    items.push(listviewSprite);
}

this._listview = new cc.Menu(items);    
this.addChild(this._listview,1);

稍后我尝试通过以下方式为菜单列表的一个精灵设置动画:

var sprite = this._listview.children[i],

sprite.runAction(
    cc.EaseSineIn.create(
        cc.spawn(
            cc.scaleTo(1,3,3),
            cc.fadeOut(1)
        )
    )
);

但这只会淡化精灵而不是标签。缩放动画也是为标签完成的,只是褪色而不是。问题是什么?错误?

1 个答案:

答案 0 :(得分:1)

您需要为希望递归影响的所有孩子(answer got from the forums)手动设置setCascadeOpacityEnabled(true);

如果你的精灵孩子有孩子(等等),你需要更多递归的东西,比如:

var setCascadeOpacityEnabledRecursively= function(node, state){
  node.children.forEach(function(child){
    setCascadeOpacityEnabledRecursively(child, state);
  });

  node.setCascadeOpacityEnabled(state);
};

然后叫它:

var sprite = this._listview.children[i];

setCascadeOpacityEnabledRecursively(sprite , true);

sprite.runAction(
  cc.easeSineIn(
    cc.spawn(
      cc.scaleTo(1,3,3),
      cc.fadeOut(1)
    )
  )
);