var fruitObj=function()

{

this.alive=[]; //果實(shí)狀態(tài)

this.x=[]; //果實(shí)出生x坐標(biāo)

this.y=[]; ?//出生的y坐標(biāo)~

this.orange=new Image();

this.blue=new Image();

this.l=[]; //果實(shí)大小

}

fruitObj.prototype.num=30;//果實(shí)個(gè)數(shù)

fruitObj.prototype.init=function()

{

for(var i=0;i<this.num;i++)

{

this.alive[i]=true;

this.born(i);

}

this.blue.src="./src/blue.png";

this.orange.src="./src/fruit.png";

}

fruitObj.prototype.draw=function()

{

for(var i=0;i<this.num;i++)

{

//畫(huà)果實(shí)~

this.l[i]+=0.01*delTime;

// console.log(this.l[i]);? ? --->此處打印，顯示為Nau 導(dǎo)致了果實(shí)無(wú)法正常生長(zhǎng)

ctx2.drawImage(this.blue,

this.x[i]-this.l[i]*0.5,

this.y[i]-this.l[i]*0.5,

this.l[i],

this.l[i]);

}

}

fruitObj.prototype.born=function(i)

{

var aneID=Math.floor(Math.random()*Ane.num);

this.x[i]=Ane.x[aneID];

this.y[i]=canheight-Ane.len[aneID];

this.l[i]=0; ? //設(shè)定30個(gè)果實(shí)初始大小均為0

}

Main函數(shù)和html中都引用了正確的Js為文件 沒(méi)有問(wèn)題