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;
}
});