phonegap+emberjs+python手机店发展，html5实现本地车类别~

商城开发项目，现在需要做出APP，无奈出场前android但不是很精通。最后选择phonegap实现app。

由于之前办理购物车分为登陆和登陆后两种情况，登录前必须充分利用本地存储。而基于phonegap本地存储的发展是使用Html5的localstorage功能实现。

特分享与此~

//内置数组对象成员方法补充，移除元素
Array.prototype.remove=function(dx)
{
if(isNaN(dx)||dx>this.length){
return false;
}
for(var i=0,n=0;i<this.length;i++)
{
if(this[i]!=this[dx])
{
this[n++]=this[i]
}
}
this.length-=1
}

//购物车类定义
cart = function(){
this.lstore = window.localStorage;
this.init();
};
cart.prototype={
init:function(){
var cart_goods_material=this.lstore.getItem('cart');
try{
this.cart_goods=JSON.parse(cart_goods_material);
if(this.cart_goods==null)
this.cart_goods=[];
}
catch(e){
this.cart_goods=[];
}
},
getall:function(){                   //获得购物车全部商品列表
return this.cart_goods;
},
insert:function(goods){              //插入商品

var index=this.finds(goods.goods_id);
if(index>-1){
this.cart_goods[index].goods_number+=goods.goods_number;
}else{
this.cart_goods.push(goods);

}
var cart_goods_cooked = JSON.stringify(this.cart_goods);
this.lstore.setItem('cart',cart_goods_cooked);
return true;
},
update:function(goods_id,data){
var index=this.finds(goods_id);
if(index>-1){
for(var i in data){
this.cart_goods[index][i]=data[i];
}
}
var cart_goods_cooked = JSON.stringify(this.cart_goods);
this.lstore.setItem('cart',cart_goods_cooked);
return true;

},
addnum:function(goods_id,num){      //更新购物车商品数量
var index=this.finds(goods_id);
var num=this.cart_goods[index]['goods_number']+num;
this.update(goods_id,{
'goods_number':num
});
},
del:function(goods_id){
var index=this.finds(goods_id);
this.cart_goods.remove(index);
var cart_goods_cooked = JSON.stringify(this.cart_goods);
this.lstore.setItem('cart',cart_goods_cooked);
return true;
},
finds:function(goods_id){
var index=-1;
for(var  i in this.cart_goods ){
var g=this.cart_goods[i];
if(g.goods_id==goods_id){
index = i;
break;
}
}
return index;
},
clear:function(){
this.lstore.setItem('cart','');
this.cart_goods=[];
},
amount:function(){
var amount=0;
for(var  i in this.cart_goods ){
amount += this.cart_goods[i]['goods_number']*this.cart_goods[i]['goods_price'];
}
return amount;
}
}