实现要点：
ng-checked：该属性影响复选框的状态，值为true则复选框选中，值为false则取消选中。
需要注意的是复选框的状态不会影响该属性的值，必须在复选框的单击事件中同步选框状态与该属性值。
页面如下
<!DOCTYPE html>
<html ng-app="myModule">
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script src="js/angular.js"></script>
</head>
<body>
<div ng-controller="myCtrl">
<input type="checkbox" ng-checked="isAllSelect" ng-click="selectAll($event)"/>全选<br />
<br />
<p ng-repeat="entity in list">
<input type="checkbox" ng-checked="isSelect" ng-click="updateSelection($event,entity.id)"/>{{entity.id}}：{{entity.text}}
</p>
<p>你选择的工具是：{{selectIds}}</p>
</div>
<script>
var app = angular.module('myModule',['ng']);
app.controller('myCtrl', function ($scope) {
//声明集合
$scope.list=[{id:1,text:'汽车'},{id:2,text:'飞机'},{id:3,text:'火车'}];
$scope.selectIds=[];//用户勾选的集合id
//单个复选框
$scope.updateSelection=function($event,id){
if($event.target.checked){//如果是被选中,则增加到数组
$scope.selectIds.push(id);
if($scope.selectIds.length == $scope.list.length){
$scope.isAllSelect=true;
$scope.isSelect=true;
}
}else{
var idx = $scope.selectIds.indexOf(id);
$scope.selectIds.splice(idx, 1);//删除
$scope.isAllSelect=false;
if($scope.selectIds.length==0){
$scope.isSelect=false;
}
}
}
$scope.selectAll=function($event){
if($event.target.checked){
//如果是被选中,则增加全部id到数组
$scope.selectIds=[];
$scope.isAllSelect=true;
$scope.isSelect=true;
angular.forEach($scope.list, function (value,key) {
$scope.selectIds.push(value.id);
});
}else{
$scope.isAllSelect=false;
$scope.isSelect=false;
$scope.selectIds=[];
}
}
})
</script>
</body>
</html>