Angularjs 使用角组件路由器时，如何检测组件变化？

现在我正在使用ui路由器来处理授权：

$rootScope.$on('$stateChangeStart', function (event, toState, toParams, fromState, fromParams) {}

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但是，自从Angular1.5以来，我如何使用ngComponentRouter来实现这一点呢？

在您拥有的新路由器中：

angular.module('app', [])
  .controller('MyController', ['user', '$http', MyController]);

function MyController(user, $http) {
  this.user = user;
  this.$http = $http;
}

// Before switching to a new component, this hook runs for 
// each active component in the app. If any of them 
// return false, a rejected promise, or a promise that resolves to false,
// the navigation is cancelled.

MyController.prototype.canActivate = function() {
  return this.user.isAdmin;
};

//This hook fires just before the nagivation finishes.

MyController.prototype.activate = function() {
  return this.bigFiles = this.$http.downloadBigFiles();
};

---

当用户尚未登录时，如何将其重定向到“/login”页面？使用canActivate钩子，但如何？没有像$stateChangeStart事件那样的“$componentChangeStart”可供侦听您拥有canActivate挂钩，在您移动到此组件之前，angular将触发此函数。它与stateChangeStart相同。