如何在AngularJS中观察路线变化?

2020/10/15 12:01 · javascript ·  · 0评论

一个人如何监视/触发路线变化的事件?

注意:这是旧版本AngularJS的正确答案。有关更新的版本,请参阅此问题

$scope.$on('$routeChangeStart', function($event, next, current) { 
   // ... you could trigger something here ...
 });

以下事件也可用(它们的回调函数采用不同的参数):

  • $ routeChangeSuccess
  • $ routeChangeError
  • $ routeUpdate-如果将reloadOnSearch属性设置为false

请参阅$ route文档。

还有其他两个未记录的事件:

  • $ locationChangeStart
  • $ locationChangeSuccess

请参阅$ locationChangeSuccess和$ locationChangeStart有什么区别?

如果您不想将手表放置在特定的控制器中,则可以在Angular应用中为整个应用添加手表 run()

var myApp = angular.module('myApp', []);

myApp.run(function($rootScope) {
    $rootScope.$on("$locationChangeStart", function(event, next, current) { 
        // handle route changes     
    });
});
$rootScope.$on( "$routeChangeStart", function(event, next, current) {
  //..do something
  //event.stopPropagation();  //if you don't want event to bubble up 
});
$rootScope.$on( "$routeChangeStart", function(event, next, current) {
  //if you want to interrupt going to another location.
  event.preventDefault();  });

这是针对整个初学者的...就像我这样:

HTML:

  <ul>
    <li>
      <a href="#"> Home </a>
    </li>
    <li>
      <a href="#Info"> Info </a>
    </li>
  </ul>

  <div ng-app="myApp" ng-controller="MainCtrl">
    <div ng-view>

    </div>
  </div>

角度:

//Create App
var app = angular.module("myApp", ["ngRoute"]);

//Configure routes
app.config(function ($routeProvider) {
    $routeProvider
      .otherwise({ template: "<p>Coming soon</p>" })
      .when("/", {
        template: "<p>Home information</p>"
      })
      .when("/Info", {
        template: "<p>Basic information</p>"
        //templateUrl: "/content/views/Info.html"
      });
});

//Controller
app.controller('MainCtrl', function ($scope, $rootScope, $location) {
  $scope.location = $location.path();
  $rootScope.$on('$routeChangeStart', function () {
    console.log("routeChangeStart");
   //Place code here:....
   });
});

希望这对像我这样的初学者有所帮助。这是完整的工作示例:

<html>
<head>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.6/angular.min.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.6/angular-route.min.js"></script>
</head>
<body>
  <ul>
    <li>
      <a href="#"> Home </a>
    </li>
    <li>
      <a href="#Info"> Info </a>
    </li>
  </ul>

  <div ng-app="myApp" ng-controller="MainCtrl">
    <div ng-view>

    </div>
  </div>
  <script>
//Create App
var app = angular.module("myApp", ["ngRoute"]);

//Configure routes
app.config(function ($routeProvider) {
    $routeProvider
      .otherwise({ template: "<p>Coming soon</p>" })
      .when("/", {
        template: "<p>Home information</p>"
      })
      .when("/Info", {
        template: "<p>Basic information</p>"
        //templateUrl: "/content/views/Info.html"
      });
});

//Controller
app.controller('MainCtrl', function ($scope, $rootScope, $location) {
  $scope.location = $location.path();
  $rootScope.$on('$routeChangeStart', function () {
    console.log("routeChangeStart");
   //Place code here:....
   });
});
  </script>
</body>
</html>
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