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EmberJS 路由器通過(guò)willTransition防止轉(zhuǎn)換

2018-01-04 11:49 更新

描述

如果URL更改，嘗試轉(zhuǎn)換將觸發(fā)當(dāng)前活動(dòng)的路由，即willTransition操作。這調(diào)用最葉路由來(lái)決定是否應(yīng)該發(fā)生轉(zhuǎn)換。

語(yǔ)句

Ember.Route.extend({
   actions: {
      willTransition: function(transition) {
         //handle the transition
      }
   }
});

例子

<!DOCTYPE html>
<html>
   <head>
      <title>Emberjs Preventing Transitions Via willTransition</title>
      <!-- CDN's -->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/3.0.1/handlebars.min.js"></script>
      <script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.10.0/ember.min.js"></script>
      <script src="https://builds.emberjs.com/tags/v1.10.0-beta.3/ember-template-compiler.js"></script>
      <script src="https://builds.emberjs.com/release/ember.debug.js"></script>
      <script src="https://builds.emberjs.com/beta/ember-data.js"></script>
   </head>
   <body>
      <script type="text/x-handlebars">
         <h1>Transactions</h1>
         <!-- link to the trans template -->
         {{link-to 'Click For Transaction' 'trans'}}
      </script>

      <script type="text/x-handlebars" data-template-name="trans">
         {{outlet}}
      </script>

      <script type="text/javascript">
         App = Ember.Application.create();

         App.Router.map(function() {
            //trans route
            this.route('trans');
         });

         App.IndexRoute = Ember.Route.extend({
            actions:{
               willTransition: function(transition){
                  //decalring the self variable
                  var self = this;
                 //checking for self var: is false
                 if(!this.get('allowTransition')){
                    document.write('<b><font color="red">');
                    //display the message
                    document.write("transition abort");
                    document.write('</font><br>');
                    transition.abort();//calling abort function

                    Ember.run.later(function(){
                       //setting the self var true
                        self.set('allowTransition', true);
                        document.write('<b><font color="blue">');
                       //display message
                        document.write("transition retry");
                        document.write('</font>');
                        transition.retry();//calling retry function
                    }, 500);
                  }
                }
             }
         });
      </script>
   </body>
</html>

輸出

讓我們執(zhí)行以下步驟，看看上面的代碼如何工作：

將上面的代碼保存在routing_prvntng_trans.html文件中
在瀏覽器中打開(kāi)此HTML文件。

以上內(nèi)容是否對(duì)您有幫助：

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