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wave-bg-weapp

v1.0.4

Published

微信小程序canvas 波浪背景组件

Downloads

5

Readme

微信小程序canvas 波浪背景组件 wave-bg-weapp

前言

最近的项目中坑爹的设计师设计了一个波浪的背景效果, 本着高度还原设计稿的原则打算用canvas实现一下, 一番百度之后并没有找到满意的效果, 所以自己撸了一个感觉还不错共享给大家.

效果

avatar

演示片段

https://developers.weixin.qq.com/s/g9tWlAmG7st8

依赖

组件依赖simplex-noise Simplex噪声算法

npm 安装 安装之后开发者工具点击npm构建

npm i wave-bg-weapp --production

引入

在app.json或index.json中引入组件

"usingComponents": {
   "bg": "/miniprogram_npm/wave-bg-weapp/bg/index"
}

页面结构

<bg class="bg" color="#d13435" percent="90" position="top" amp="20"></bg>

参数

| 参数 | 说明 | 类型 | 默认值 | 版本 | | --- | --- | --- | --- | --- | | color | 波浪填充颜色 | String | #d13435 | 1.0.2 |
| percent | 高度百分比 如:90(即波浪高度为canvas高度的90%) | Number | 50 | 1.0.2 |
| position | 波浪填充位置 可设置 top: 在上部填充颜色, bottom: 在下部填充颜色 | String | top | 1.0.2 |
| amp | 波浪振幅 | Number | 20 | 2.0.2 |

插槽

不知道为何canvas写完之后发现层级很高,但是看官方文档支持同层渲染阿 没研究明白,弄了个插槽可以将一些元素覆盖上去,本质上是写了cover-view,所以插槽里只能用cover-view下支持的组件,而且开发者工具看不到覆盖的东西,真机测试有效果

<bg class="bg" color="#d13435" percent="90" position="top" amp="20">
  <cover-view>插槽内容</cover-view>
</bg>