假设我有一个主干路由器,例如:
routes:
"" : "homepage"
"catalog/:id" : "catalogPage"
"catalog/:id/products/:id2" : "productPage"
homepage : -> doStuff()
catalogPage: (id) -> doOtherStuff()
productPage: (id, id2) -> doEvenMoreStuff()
和一个函数:
executeBefore = -> console.log("hello")
如果我希望每次调用路由时以及相应的路由方法之前调用并执行executeBefore,除了在每个路由方法的开头插入对executeBefore的调用之外,是否有一种简单的方法可以做到这一点?
您可以覆盖route
路由器类中的函数用于拦截路由调用:
var Router = Backbone.Router.extend({
routes: {
"" : "homepage",
"catalog/:id" : "catalogPage"
},
route: function(route, name, callback) {
var router = this;
if (!callback) callback = this[name];
var f = function() {
console.log('route before', route);
callback.apply(router, arguments);
console.log('route after', route);
};
return Backbone.Router.prototype.route.call(this, route, name, f);
},
homepage: function() {
console.log("homepage");
},
catalogPage: function(id) {
console.log("catalogPage "+id);
}
});
var r = new Router();
Backbone.history.start();
还有一个演示http://jsfiddle.net/nikoshr/EdLzh/ http://jsfiddle.net/nikoshr/EdLzh/
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