cocos creator实现滚动公告

2019独角兽企业重金招聘Python工程师标准>>>

cc.Class({

extends: cc.Component,

 

properties: {

marqueeLabel:cc.RichText,

mask: cc.Node

},

 

onLoad: function(){

this.desc1 = "啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊"

this.desc2 = "呃呃呃呃呃呃呃呃呃呃呃呃呃呃呃呃呃呃"

this.desc3 = "哈哈哈哈"

this.descs = []

this.descs.unshift(this.desc1)

this.descs.unshift(this.desc2)

this.descs.unshift(this.desc3)

 

this.marqeeIndex = 0;

this.marqueeBg = this.node;

this.marqueeBg.opacity = 0;

},

 

update: function(){

try{

var endIndex = this.descs.length - 1

var desc = this.descs[endIndex]

if(desc){

this.runMarqeeBar(desc)

this.descs[endIndex] = null;

}

}catch(e){

}

},

 

runMarqeeBar: function(desc){

this.marqueeBg.opacity = 255;

this.marqueeLabel.node.x = this.mask.width;

this.marqueeLabel.string = desc;

this.marqueeLabel.node.runAction(cc.sequence(

cc.moveTo(10, -this.marqueeLabel.node.width, 0),

cc.callFunc(()=>{

this.descs.pop();

if(!this.isExistContent()){

this.descs.unshift(this.desc1)

// this.marqueeBg.opacity = 0;

}

}, this, this)))

},

 

isExistContent: function(){

if (this.descs[this.descs.length - 1]){

return true;

}

return false;

}

});

转载于:https://my.oschina.net/andyzzh1314/blog/1924526