Angular.js - 如何从dom事件绑定对象

时间:2016-09-05 16:09:17

标签: javascript angularjs angular-material

我正在开发一款游戏,它使用angular.js作为ui和游戏引擎类。

由于游戏引擎类和角度素材库之间存在冲突,我必须在角度后按顺序加载游戏引擎。

一旦游戏引擎被初始化,它会发送一个自定义的dom事件“clientReady”,附加了2个对象,我需要在我的角度控制器中访问。

所以在app.run上我将这2个对象初始化为根范围,如下所示:

app.run(function($rootScope) {
    $rootScope.engine = {};
    $rootScope.editor = {};
    document.addEventListener('clientReady', function(e) {
        $rootScope.$apply(function() {
            $rootScope.engine = e.detail.engine;
            $rootScope.editor = e.detail.editor;
        });
    });
});

现在在我的控制器中我试图设置范围如:

$scope.player = $rootScope.engine.player;

这当然不起作用,因为“clientReady”事件在角度初始化后发生,并且在开始运行控制器时rootcope不存在。

有办法解决这个问题吗?我想知道我是否可以在dom事件之后以某种方式启动控制器。

此致 斯蒂芬

2 个答案:

答案 0 :(得分:1)

您无法“启动”控制器。您可以转到视图,它将运行控制器并将控制器的范围与其对应的视图绑定。

因此,如果您希望始终收听此事件,则应在BodyController中执行此操作。但是,如果您只想在某些视图上收听此事件,那么您应该只在app.run上执行此操作

app.controller('BodyController', function($rootScope) {
  $document.addEventListener('clientReady', function(e) {
    
    //  Decide based on view when you want to change initialize the game or not
    if($location.path == '/login') {
      // don't let the user init as he/she is not logged in
    } else {
      //init
      // Store e in a service or $rootScope. I'd pick a service to do this as I wouldn't want to clutter my $rootScope
      GameService.save(e);
      // Handle transition to the new path
      $location.path('/something'); 
    }
    
    
    
  });  
})

或者如果你只想在一个或多个视图上听这个。 1.在一个或多个视图上监听clientReady事件(假设此事件仅初始化一次)

所以,让我们说你的家/默认视图是'/'。然后在HomeController中,你这样做:

app.controller('MainCtrl', function($scope, $document) {

    $document.addEventListener('clientReady', function(e) {
        // Store e in a service or $rootScope. I'd pick a service to do this as I wouldn't want to clutter my $rootScope
        GameService.save(e);
        // Goto to View/Controller that needs e
        $location.path('/something');
    });
}

  1. 接下来在“/ game”路线中,您可以开始所有游戏过程。这将起作用,因为isInitialized()仅在clientReady事件被触发时才返回true。如果isInitialized()return false, then the $location will be changed and execution of GameCtrl will stop (because of return`陈述)
  2. app.controller('GameCtrl', function($scope, GameService, $location) {
      if(!GameService.isInitialized()) {
        $location.path('/home'); // or to any other route you deem fit
        // Instead of redirecting, you can handle this gracefully on this view too. But I think that'll take much more effort.
        return; //Important so that the controller is not processed any further
      }
      // This is where the magic happens!
      $scope.engine = GameService.getEngine();
      $scope.editor = GameService.getEditor();
    }

    1. 您的GameService是存储游戏引擎和其他客户端给定对象的地方。
    2. angular.module('myApp').service('GameService', function() {
        // AngularJS will instantiate a singleton by calling "new" on this function
          this.getEngine = function() {
            // Logic  
          }
          this.getEditor = function () {
            // Logic  
          }
          this.isInitialized = function () {
            // Logic  
          }
      };

答案 1 :(得分:0)

您可以使用$broadcast & $on进行通信。

document.addEventListener('clientReady', function(e) {
            var objData = {};
            objData.engine = e.detail.engine;
            objData.editor = e.detail.editor;

            $rootScope.$broadcast('updated-data',{objData : objData});
});

在控制器中,

$scope.$on('updated-data',function(event,eveneData){

        console.log(eveneData);
})