最近兩天看了下官方的文檔，和網路上找到的教程，來學習angular裡的自訂指令。
下面定義的指令想實現的功能很簡單，點選 + - 能夠改變商品的數量
增加減少商品數量按鈕功能有些問題，還需要完善
PS：寫這個指令除了想練習指令的屬性的運用，更想知道scope中的'=' '@' '&'怎麼使用
今天看了下官方文件的講解，還是不怎麼理解，所以決定寫個例子看看
寫的購物車，點選 + - 不能改變數量？
<!DOCTYPE html>
<html ng-app="myApp">
<head >
<meta charset="utf-8">
<title>angular directive tab选项卡</title>
<link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap.min.css" type="text/css">
</head>
<body>
<shop-cart></shop-cart>
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="http://cdn.bootcss.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<script type="text/javascript">
angular.module('myApp',[])
.controller('myCtrl',['$scope',function($scope){
$scope.datas = [
{name:'花生',price:14,number:1,addBtn:'+',reduceBtn:'-'},
{name:'牛奶',price:25,number:1,addBtn:'+',reduceBtn:'-'},
{name:'蛋糕',price:25,number:1,addBtn:'+',reduceBtn:'-'}
];
}])
.directive('shopCart',function() {
return {
restrict:'EA',
scope:{
onAdd:'&',
onReduce:'&'
},
templateUrl:'shop-cart.html',
controller: 'myCtrl',
link: function(scope,element,attr) {
scope.onAdd = function(num,index){
num =scope.datas[index].number + 1
scope.datas[index].number = num;
};
scope.onReduce = function(num,index){
if(num > 0) {
num =scope.datas[index].number - 1
scope.datas[index].number = num;
}
};
console.log(scope);
}
}
});
</script>
</body>
</html>
<table class="table table-striped" ng-controller="myCtrl">
<thead>
<tr>
<th>商品名称</th>
<th>单价</th>
<th>商品数量</th>
<th>增加商品数量</th>
<th>减少商品数量 </th>
</tr>
</thead>
<tbody>
<tr ng-repeat="data in datas">
<td>{{data.name}}</td>
<td>{{data.price}}</td>
<td ng-model="data.number">{{data.number}}</td>
<td><a ng-click="onAdd(data.number,$index)">{{data.addBtn}}</a></td>
<td><a ng-click="onReduce(data.number,$index)">{{data.reduceBtn}}</a></td></td>
</tr>
</tbody>
</table>
