angularjs – 如何递归要求访问父指令的控制器？

我正在递归地到达父“框”指令的控制器：

<body ng-app="main">

<!-- no nesting: parent is the just body -->
<Box></Box>

<script type="text/javascript">
angular.module('main',[])
.directive('Box',function() {
    return {
        restrict: 'E',controller: function() { },require: '?^Box',// find optional PARENT "Box" directive
        link: function(scope,iElement,iAttrs,controller) {
            // controller should be undefined,as there is no parent Box
            alert('Controller found: ' + (controller !== undefined));
        }
    };
});
</script>
</body>

我期望控制器变量在链接函数中未定义，但是我得到了实际框指令的控制器。

所以我的问题是…如何获得对PARENT控制器的访问情况，如下所示：

<Box>
    <Box></Box>
</Box>

http://jsfiddle.net/gjv9g/1/

由于Angular 1.3，您可以使用两个口音^^在父元素“only”中搜索指令。

报价从Angular Docs on require：

(no prefix) – Locate the required controller on the current element. Throw an error if not found.

? – Attempt to locate the required controller or pass null to the link fn if not found.

^ – Locate the
required controller by searching the element and its parents. Throw an error if not found.

^^ – Locate the required controller by searching the element’s parents. Throw an error if not found.

?^ – Attempt to locate the required controller by searching the element and its parents or pass null to the link fn if not found.

?^^ – Attempt to locate the required controller by searching the element’s parents,or pass null to the link fn if not found.

在你的情况下，替换require：’？^ Box’，需要：’？^^ Box’，

angularjs – 如何递归要求访问父指令的控制器？

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