问题
I am trying to detect when a route transition occurs. I've located this code snippet inside the latest version of Ember (v1.0.0-pre.4
) that handles the transitions:
didTransition: function(infos) {
// Don't do any further action here if we redirected
if (infos[infos.length-1].handler.transitioned) { return; }
var appController = this.container.lookup('controller:application'),
path = routePath(infos);
set(appController, 'currentPath', path);
this.notifyPropertyChange('url');
if (get(this, 'namespace').LOG_TRANSITIONS) {
Ember.Logger.log("Transitioned into '" + path + "'");
}
},
I set up my Ember application as window.App = Ember.Application.create()
.
I noticed that it calls this.notifyPropertyChange('url');
, but I tried to attach an observer to my application App.Router
or App.Router.router
, I get an error because it does not implement Ember.Observable
.
How can I detect when the route path is changed without creating a special Ember.Route for each of my routes?
回答1:
UPDATED ANSWER
You can now simply bind an observer on the router's didTransition
event:
App.Router.reopen({
doSomethingOnUrlChange: function() {
console.log(this.get('url'));
}.on('didTransition')
});
see working example: http://jsfiddle.net/Sly7/3THD7/
DEPRECATED ANSWER BELOW
In the snippet here, there is set(appController, 'currentPath', path);
I think you can put an observer on this property.
I don't know exactly where you want to be notified, but it's possible to do it in the ApplicationController itself.
App.ApplicationController = Ember.Controller.extend({
currentPathDidChange: function(){
// the currentPath has changed;
}.observes('currentPath');
});
See this working fiddle for example: http://jsfiddle.net/qKrwU/
来源:https://stackoverflow.com/questions/14425276/detect-route-transitions-in-emberjs-1-0-0-pre-4