商城開發項目，現在需要做出APP，無奈出場前android但不是很精通。最后選擇phonegap實現app。

由于之前辦理購物車分為登陸和登陸后兩種情況，登錄前必須充分利用本地存儲。而基于phonegap本地存儲的發展是使用Html5的localstorage功能實現。

特分享與此~

//內置數組對象成員方法補充，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
}

? ? ? ? ? ??
? ? ? ? ? ??

//購物車類定義
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(){                   //獲得購物車全部商品列表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){      //更新購物車商品數量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;}
}

版權聲明：本文博客原創文章。博客，未經同意，不得轉載。

轉載于:https://www.cnblogs.com/yxwkf/p/4640767.html

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