angularjs - 有人可以提供 AngularJS 中范围的 $destroy 事件的示例吗？

Question

有人可以提供作用域 $destroy 事件的示例吗？这是来自http://docs.angularjs.org/api/ng.$rootScope.Scope#$destroy的引用文档

$destroy()

Removes the current scope (and all of its children) from the parent scope. Removal implies that calls to $digest() will no longer propagate to the current scope and its children. Removal also implies that the current scope is eligible for garbage collection.

The $destroy() is usually used by directives such as ngRepeat for managing the unrolling of the loop.

Just before a scope is destroyed a $destroy event is broadcasted on this scope. Application code can register a $destroy event handler that will give it chance to perform any necessary cleanup.

Answer 1

演示:http://jsfiddle.net/sunnycpp/u4vjR/2/

这里我创建了handle-destroy指令。

ctrl.directive('handleDestroy', function() {
    return function(scope, tElement, attributes) {        
        scope.$on('$destroy', function() {
            alert("In destroy of:" + scope.todo.text);
        });
    };
});