我可以在 React Native 中制作动态样式吗? [英] Can I make dynamic styles in React Native?

问题描述

假设我有一个渲染如下的组件:

Say I have a component with a render like this:

<View style={jewelStyle}></View>

其中jewelStyle =

Where jewelStyle =

  {
    borderRadius: 10,
    backgroundColor: '#FFEFCC',
    width: 20,
    height: 20,
  },

如何使背景颜色动态且随机分配?我试过了

How could I make the background colour dynamic and randomly assigned? I've tried

  {
    borderRadius: 10,
    backgroundColor: getRandomColor(),
    width: 20,
    height: 20,
  },

但这使得 View 的所有实例都具有相同的颜色，我希望每个实例都是独一无二的.

But this makes all instances of View have the same colour, I want each one to be unique.

有什么建议吗?

推荐答案

我通常会做一些类似的事情:

I usually do something along the lines of:

<View style={this.jewelStyle()} />

...

jewelStyle = function(options) {
   return {
     borderRadius: 12,
     background: randomColor(),
   }
 }

每次渲染 View 时，都会实例化一个新的样式对象，并使用与之关联的随机颜色.当然，这意味着每次重新渲染组件时颜色都会改变，这可能不是您想要的.相反，您可以执行以下操作:

Every time View is rendered, a new style object will be instantiated with a random color associated with it. Of course, this means that the colors will change every time the component is re-rendered, which is perhaps not what you want. Instead, you could do something like this:

var myColor = randomColor()
<View style={jewelStyle(myColor)} />

...

jewelStyle = function(myColor) {
   return {
     borderRadius: 10,
     background: myColor,
   }
 }

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