创建一个带有隔离范围的角度树指令,该范围绑定两个属性的值... items和item-click-handler。这是代码:
HTML
<div ng-app="myapp">
<div ng-controller="TreeCtrl">
<item-tree class="tree" items="treeFamily" item-click-handler="groupSelectedFunction(itemId)"></item-tree>
</div>
JAVASCRIPT
var module = angular.module('myapp', []);
module.controller("TreeCtrl", function($scope) {
$scope.treeFamily = [{
Name : "Parent",
Code : "Parent",
Children: [{
Name : "Child1",
Code : "Child1",
Children: [{
Name : "Grandchild1",
Code : "Grandchild1",
Children: []
},{
Name : "Grandchild2",
Code : "Grandchild2",
Children: []
},{
Name : "Grandchild3",
Code : "Grandchild3",
Children: []
}]
}, {
Name: "Child2",
Code : "Child2",
Children: []
}]
}];
$scope.groupSelectedFunction = function (itemId) {
alert(itemId + ' selected');
}
});
module.directive("itemTree", function($compile) {
return {
restrict: "E",
scope: {
items: '=',
itemClickHandler: '&'
},
template:
'<ul id="group-nodes" ng-repeat="item in items">' +
'<li id={{ item.Code }}>' +
'<a ng-click="itemClickHandler({itemId: 1})">{{ item.Name }}</a>'+
'<item-tree items="item.Children" item-click-handler="itemClickHandler(itemId)"></item-tree>' +
'</li>' +
'</ul>',
compile: function(tElement, tAttr) {
var contents = tElement.contents().remove();
var compiledContents;
return function(scope, iElement, iAttr) {
if(!compiledContents) {
compiledContents = $compile(contents);
}
compiledContents(scope, function(clone, scope) {
iElement.append(clone);
});
};
}
};
});
树很好。如果我单击顶级父节点,控制器功能将运行并显示具有预期值的警报:&#34;父选择&#34; 。但是,如果单击任何其他节点,则该功能会运行,但警告消息为:&#34;未定义选择&#34; 。对Angular来说比较新,所以这个让我挠头。非常感谢任何帮助。
答案 0 :(得分:2)
目前尚不清楚每个子节点的警报中应显示哪些ID,但更明显的是您为什么会看到undefined
而不是值...
使用&
隔离范围类型时,从模板传递给函数的参数需要在一个对象中传递,后面是顶级元素:
ng-click="itemClickHandler({itemId: 1})"
您需要为孩子遵循相同的语法。所以,
item-click-handler="itemClickHandler(itemId)"
应该是
item-click-handler="itemClickHandler({itemId: itemId})"