始终在范围 destory 事件上取消注册 rootScope.on 侦听器

如果你导航到另一个控制器，$ rootScope。$ on 侦听器将保留在内存中。如果控制器超出范围，这将产生内存泄漏。

别

angular.module('app').controller('badExampleController', badExample);

badExample.$inject = ['$scope', '$rootScope'];
function badExample($scope, $rootScope) {

    $rootScope.$on('post:created', function postCreated(event, data) {});

}

做

angular.module('app').controller('goodExampleController', goodExample);

goodExample.$inject = ['$scope', '$rootScope'];
function goodExample($scope, $rootScope) {

    var deregister = $rootScope.$on('post:created', function postCreated(event, data) {});

    $scope.$on('$destroy', function destroyScope() {
        deregister();
    });

}