在Ember.js v2 +中检测按键 [英] Detecting keypress in Ember.js v2+

问题描述

我在ember v2.3.0中检测到按键问题。我是ember的初学者，我尝试编写一个显示按下键的简单组件。但是我在运行动作和参数方面遇到了问题。
基本上，我可以在didRender中使用 this。$（）。on（ keypress，function（）{...}）; 来获取keyCode，但是我认为这不是Ember的好习惯。有人可以帮我吗？请。 ：）

I've problem with detecting keypress in ember v2.3.0. I'm beginer with ember and I try write simple component that display pressed key. But I got problem with run action and take parameters. Basicly I could use this.$().on("keypress",function(){ ... }); in didRender to get keyCode but I think it's not a good practice in Ember. Could someone help me with this? Please. :)

这是我的代码：
http://emberjs.jsbin.com/vucenomibo/edit?html,js，输出

HTML：

  <script type="text/x-handlebars" data-template-name="application">
     <h2>Welcome to Ember.js</h2>
     {{outlet}}
  </script>

  <script type="text/x-handlebars" data-template-name="index">
     {{my-component item=this setAction="smth"}}
  </script>

  <script type="text/x-handlebars" data-template-name="components/my-component">
     <div class="app-body" {{action "smth"}} >
       Pressed: {{pressedKeyCode}}
     </div> 
  </script>

JS：

App = Em.Application.create();

App.IndexController = Em.Controller.extend({
  actions : {

  }
});

App.MyComponentComponent = Em.Component.extend({
  didRender: function() {
    console.log(this.get('context'));
    console.log(this.get('item'));
    return this.$().attr({ tabindex: 1 }), this.$().focus();
  },
  pressedKeyCode: null,
  actions:{
    smth: function(e) {
      console.log('aaa');
      this.send('displayKey', String.fromCharCode(e.keyCode));
    },
    displayKey: function(keyCode) {    
        this.get('item').set('pressedKeyCode', keyCode); 
    }

  }
});

编辑

我做到了：
http://emberjs.jsbin.com/qipeponiqu/1 / edit？html，js，output

有人可以复习吗？我想学习最佳做法。 ：）

Can someone review it, please? I want learn best practices. :)

推荐答案

Ember.js官方指南中有关于处理事件应该会有所帮助。

The official Ember.js guides have a section on handling events that should be helpful.

如果您希望使用组件要处理 keydown ，您可以这样做：

If you want your component to handle keydown you can do it like this:

import Ember from 'ember';

export default Ember.Component.extend({
  didRender: function() {
    this.$().attr({ tabindex: 1 });
    this.$().focus();
  },
  shortcutKey: null,

  keyDown(event) {
    this.set('shortcutKey', String.fromCharCode(event.keyCode));
  }
});

请参见余下的完整的Ember Twiddle ，但模板与您的模板相同。

See the full Ember Twiddle for the rest, but the template is the same as yours.

这篇关于在Ember.js v2 +中检测按键的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！