如何使用Polymer1.0实现长按事件？ [英] How to implement long-press event using Polymer1.0?

问题描述

您如何实现这一点？

我想到了一些行为，并使用下来和 up 事件与一些去抖动来管理这样一个新事件的技巧，但这意味着我必须使一个自定义元素来使用这个行为，例如直接使用它，就像我想要的任何元素一样：

 < div on-long-press =_ cheese> ...< / div> 
  

这不方便。

你有其他解决方案吗？

解决方案

您不必为此创建自定义元素。这是聚合物行为所适用的。它们为不同的聚合物元素提供了一种共享共同行为的方法。

对于实现长按的实际javascript，您可以从这个疑问。

It seems like long-press event is not part of the Polymer's specifications.

How would you implement that ?

I thought about using a behavior and using down and up event with some debounce tricks to manage such a new event but that means I have to make a custom element to use this behavior and can't for example use it directly on any elements I want like :

<div on-long-press="_cheese">...</div>

which is not convenient.

Would you have other solutions ?

解决方案

You don't have to make a custom element for this. This is what polymer behaviors are for. They provide a way for different polymer elements to share common behaviors.

As for the actual javascript for implementing the long-press you can get ideas from this question.

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