代碼應(yīng)該沒錯誤，但是果實沒有

var fruitObj = function()
{
?? ??? ?this.alive = [];
?? ??? ?this.x = [];
?? ??? ?this.y = [];
?? ??? ?this.orange = new Image();
?? ??? ?this.blue = new Image();
}
fruitObj.prototype.num = 30;
fruitObj.prototype.init = function()
{

?? ?for(var i = 0;i < this.num; i++)
?? ?{
?? ??? ?this.alive[i] = true;
?? ??? ?this.x[i] = 0;
?? ??? ?this.y = 0;
?? ??? ?this.born(i);
?? ?}
?? ?this.orange.src = "./src/fruit.png";
?? ?this.blue.src = "./src/blue.png";
}
fruitObj.prototype.draw = function()
{
?? ?for(var i = 0; i < this.num; i ++)
?? ?{
?? ??? ??? ?ctx2.drawImage(this.orange, this.x[i] - this.orange.width * 0.5,this.y[i] - this.orange.height * 0.5);
?? ?}
}
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];
}