text: var cartController = function($scope){
  	$scope.cart = [
  		{
  			id:100,
  			name:'iphone5s',
  			quantity:2,
  			price:4300
  		},
  		{
  			id:130,
  			name:'iphone5',
  			quantity:1,
  			price:2100			
  		},
  		{
  			id:200,
  			name:'imac',
  			quantity:5,
  			price:14300
  		},
  		{
  			id:110,
  			name:'ipid',
  			quantity:30,
  			price:3300
  		}
  	];
  	//总购买数量
  	$scope.totalQuantity = function(){
  		var total = 0;
  		angular.forEach($scope.cart,function(item){
  			total += parseInt(item.quantity);
  		});
  		return total;
  	};
  	//总购买价格
  	$scope.totalPrice = function(){
  		var total = 0;
  		angular.forEach($scope.cart,function(item){
  			total += parseInt(item.quantity*item.price);
  		});
  		return total;
  	};
  	//找一个项目
  	$scope.findItem = function(id){
  		var index = -1;
  		angular.forEach($scope.cart, function(item, key){
  			if(item.id === id){
  				index = key;
  				return;
  			};
  		});
  		return index;
  	};
  	//移除table
  	$scope.remove = function(id){
  		var index = $scope.findItem(id);
  		if(index !== -1){
  			$scope.cart.splice(index,1);	
  		};
  	};
  	//减少一个商品数量
  	$scope.reduce = function(id){
  		var index = $scope.findItem(id);
  		if(index !== -1){
  			var item = $scope.cart[index]
  			if(item.quantity>1){
  				--item.quantity;
  			} else{
  				var returnKey = confirm("是否从购物车中删除该产品！");
  				if(returnKey){
  					$scope.remove(id);
  				}
  			}	
  		}
  	};
  	//增加一个商品数量
  	$scope.add = function(id){
  		var index = $scope.findItem(id);
  		if(index !== -1){
  			++$scope.cart[index].quantity;	
  		};	
  	};
  	$scope.$watch('cart',function(newvalue,oldvalue){
  		angular.forEach(newvalue, function(item, key){
  			if(item.quantity < 1 && item.quantity!==''){
  				var returnKey = confirm("是否从购物车中删除该产品！");
  				if(returnKey){
  					$scope.remove(id);
  				}else{
  					item.quantity = oldvalue[key].quantity;
  				};
  			};
  		});
  	},true);
  }