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如何在Pocket Option中最大化利润并降低风险

发布时间:2017-06-06 17:16:57 作者:佚名 我要评论

React onClick event 如何在Pocket Option中最大化利润并降低风险 on component

I have a React component called that has many child s (another React component). I want to be 如何在Pocket Option中最大化利润并降低风险 able to declare an onClick event on each from within . I have tried doing the following:

Needless to say, 如何在Pocket Option中最大化利润并降低风险 I do not get any "Clicked!" coming up in my console. The React inspector in Chrome indicates that an onClick event is registered, with the above function body as it should be.

I conclude, therefore, that I can'如何在Pocket Option中最大化利润并降低风险 t register onClick events on the actual tags (I'm not sure why this is, however). How do I go about achieving this otherwise?

2 Answers 2

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This depends on your SensorItem component's definition. Because SensorItem isn't a native DOM element but, like you said, another React 如何在Pocket Option中最大化利润并降低风险 component, onClick as defined here is simply a property of that component. What you need to do is, inside of the SensorItem component pass the onClick prop to an DOM component's onClick event:

Got it, I had thought perhaps that a component automatically passed on any events to the main DOM Node ( getDOMNode() ), but there's no reason this should be the case.

I had 如何在Pocket Option中最大化利润并降低风险 thought, assumed, was certain that those geniuses at Facebook would'如何在Pocket Option中最大化利润并降低风险 如何在Pocket Option中最大化利润并降低风险 ve thought it would be convenient. Not convenient enough, 如何在Pocket Option中最大化利润并降低风险 I guess.

To add to that, you can pass through all props to the main DOM Node fairly easily 如何在Pocket Option中最大化利润并降低风险 如何在Pocket Option中最大化利润并降低风险 with argument destructuring syntax like this: ``` const SensorItem = (<. props>) => < return (

> .
); > ``` That makes it future-proof if you need to add onDoubleClick, onKeyDown, etc.

Problem

The problem, as being explained in another answer, is that onClick on a React component (contrary to native DOM element like or

) is treated as passing of component property, and not of a DOM event handler. And 如何在Pocket Option中最大化利润并降低风险 as most likely your component doesn't declare onClick property, that property value simply gets lost.

Solution

The most straightforward solution is to add onClick property explicitly on SensorItem component, then pass it to the root DOM element of that component:

But the solution that usually works best for me is to group all the undefined component's properties using object destructuring notation, then pass them all 如何在Pocket Option中最大化利润并降低风险 to the root DOM element within that component. This way 如何在Pocket Option中最大化利润并降低风险 如何在Pocket Option中最大化利润并降低风险 you can pass onClick , onHover , className etc. without needing 如何在Pocket Option中最大化利润并降低风险 to define separate properties for each one of them:

No matter which of the two approaches you use, the handler will now work, as it'll now be attached to the root DOM element of SensorItem :

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unity3D中怎么修改及显示Text的值?

发布时间:2017-06-06 17:16:57 作者:佚名 我要评论

unity3d Pro V2017.6 绿色版

  • 类型: 编程工具
  • 大小: 68.3KB
  • 语言: 简体中文
  • 时间: 2017-12-01

1、首先在层级框中创建一个 text对象 。如图所示

2、我们会发现text不像之前版本一样单独存在而是作为Canvas的子对象存在的。

3、双击script文件进入脚本编辑器

C#代码:使用C#代码前需要通过using UnityEngine.UI;导入相应类库,格外注意代码中的方法是 GetComponent()而不是GetComponents()。

6、JS代码:使用JS代码前需要通过import UnityEngine.UI;导入相应的类库,格外注意代码中的方法是 GetComponent()而不是GetComponents()。