视图的迭代和它的ng-repeat属性绑定的数据是实时绑定的,一旦数据发生了改变,视图也会立即更新迭代.
还是刚才的那个例子,给它添加一个添加数据按钮和一个删除数据按钮.
<!DOCTYPE html>
<html ng-app>
<head>
<title>4.1.迭代</title>
<meta charset="utf-8">
<script src="../angular.js"></script>
<script src="script.js"></script>
</head>
<body>
<div ng-controller="StudentList">
<ul>
<li ng-repeat="student in students">
<span class="index">{{$index+1}}</span><span class="name"><a href="/student/view/{{student.id}}" class="name">{{student.name}}</a></span><span
class="score">{{student.score}}</span>
</li>
</ul>
<button ng-click="insertDog()">添加</button>
<button ng-click="delLast()">删除</button>
</div>
</body>
</html>
function StudentList ($scope){
$scope.students = [{"name":"code_bunny","score":"100","id":"001"},{"name":"white_bunny","score":"90","id":"002"},{"name":"black_bunny","score":"80","id":"003"}];
$scope.insertDog = function(){
$scope.students.splice($scope.students.length,0,{"name":"code_dog","score":"101","id":"004"})
};
$scope.delLast = function(){
$scope.students.splice(-1,1)
}
}
insertDog方法和selLast方法,分别是往students数组里添加项和删除项.
可以看到,一旦students数组发生变化,通过ng-repeat属性绑定它的li项的迭代也会实时更新: 一开始:点击添加后:
点击两次删除后: