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小程序中 icon 颜色自定义解决方案

背景

随着公司业务的发展,现在的产品真的是越来越 体(sang)贴(xin)用(bing)户(kuang) 了,刚好前阵子准备做一个后台可以让用用户 DIY 自己的小程序,不小心看到了 某网 提供了一套图标库,用户可以自主选择,并且可以进行颜色配置的时候,我就感觉事情不妙~

当时脑子一热,桌子一拍,我们也需要提供这样的功能,而且要做的比他们还强大...

作为开发的我默默的留下了这张图~

我们知道小程序里面是不支持类似 ttf woff 这类字体的,直接引入编译都过不去~

这个就是要告诉我们,我们不能像 H5 那样直接把字体下载下来然后引入到样式中,这条道路是行不通了,只能重新找找方案了~

嗯,我也不 藏着掖着了 , 接下来给大家 安利 2 中解决方案~

解决方案

方案一

利用小程序中不支持 ttf 字体,却支持 base64 的特点,我们可以通过将 ttf 字体转码成 base64 ,再通过 iconfont 的特点,通过设置字体大小和颜色来达到目的。

其具体实现如下:

  • 1.我们可以先去阿里提供的图标库 官网 下载我们需要的图标,一般来说都够用了,这里我随便好了 3 个作为测试用 , 点击 下载代码 将代码下载到本地~

  • 2.解压我们刚才下载的包,会有以下这些文件,但对于我们来说,会用到的只有 iconfont.cssiconfont.ttf 这两个文件,

  • 3.我们要对 iconfont.ttf 这个文件进行转码,将它转成 base64 格式,刚好 这个网站 就提供了这个功能(pass:这个网站可能会有点慢,可以的话代理加个速),按照下图的步骤,分别上传 ttf 文件,选择配置,点击转换。

  • 4.转换完成如下图所示,废话不多说,直接下载下来解压,我们需要的是里面 stylesheet.css 这个文件

  • 5.我们在小程序里的静态资源文件夹里新建一个叫 iconfont.wxss 样式文件,将 上面解压出来的 stylesheet.css 里面的内容全部拷贝到 iconfont.wxss 中,另外,还记得我们上面说的 iconfont.css 吗?这时候就要派上用场了,我们打开 iconfont.css 这个样式文件,将下面的样式,也就是我用红框标注的内容复制到 iconfont.wxss 文件里,注意上面的不需要复制!!

到此为止,准备工作算是已经完成了,这时候你的 iconfont.wxss 应该类似下面这样

iconfont.wxss

@font-face {
    font-family: 'iconfont';
    src: url(data:font/truetype;charset=utf-8;base64,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) format('truetype');
    font-weight: normal;
    font-style: normal;
}

.iconfont {
  font-family:"iconfont" !important;
  font-size:16px;
  font-style:normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.icon-map:before { content: "\e6a2"; }

.icon-success:before { content: "\e6b3"; }

.icon-atm:before { content: "\e6bd"; }

复制代码
  • 6.接着,将我们的字体文件引入到 app.wxss 全局 , 这样你就可以在任何你想用到的地方进行调用了,只需要将 class 写对就没什么问题了,

    <!--index.wxml-->
    <view class="container">
        <view class='block'>
            <text class='iconfont icon-map'></text>
            <text>地图</text>
        </view>
        <view class='block'>
            <text class='iconfont icon-success'></text>
            <text>成功</text>
        </view>
        <view class='block'>
            <text class='iconfont icon-atm'></text>
            <text>atm</text>
        </view>
    </view>
    复制代码

    怎么样,成功了吧!

    什么? 你要换颜色,难不倒我的,只要改变对应的 color 就可以了~

    <!--index.wxml-->
    <view class="container">
        <view class='block'>
            <text class='iconfont icon-map' style='color : red'></text>
            <text>地图</text>
        </view>
        <view class='block'>
            <text class='iconfont icon-success' style='color : green'></text>
            <text>成功</text>
        </view>
        <view class='block'>
            <text class='iconfont icon-atm' style='color : blue'></text>
            <text>atm</text>
        </view>
    </view>
    复制代码

嗯,是不是可以插会儿腰了~

且慢,刚不是说两种方案么,怎么到这里就叉起腰来了,还没完呢,等会嘚瑟哈!!

方案二

刚介绍了方案一,确实是一种选择,我们只需约定好样式,类名,后端将颜色什么的返回给我们就好了~

但是这种方案存在弊端,不够灵活,如果我们要更新我们的图标库,那么我们上面的流程又得走一遍,如果后面图标库的类型变多,那么我们转码后的文件会随之变大,这对于小程序来说是致命的,因为做小程序都知道,我们都在时刻想着如何用最少的代码发挥最大的价值!

所以,这种方案有一定的局限性,因此才出了第二套方案~

第二套方案的思路是借助 svg 矢量图具有不失真和可以自主填充颜色的特点,通过 fill 属性,用户可以自定义填充颜色,但是小程序里面不支持 svg 标签的,我们通过颜色选择器将用户选择好的颜色填充到 svg 里,在通过转码将换过颜色的 svg 转成 base64 编码发给小程序,小程序可以直接用在 image 标签中的 src 属性上~

我们一起来试试~

  • 1.我们还是先去阿里提供的图标库 官网 下载我们需要的图标,这次跟第一次有些不一样,这次我们要选择下载素材,选择 svg~

  • 2.将下载好的 svg 源代码直接放在我们的图标库里面,选择某个图标之后,通过颜色选择器我们可以通过 js 设置对应的 svg 图标的 fill 属性,动态的给图标填充不同的颜色,差不多就跟下面的效果有点相似~

  • 3.接下来可以将换过颜色的 svg 通过 svgbase64 的插件将其转换成 base64 编码,这里为了方便,我直接偷懒,在线转换了,对应的 base64 编码如下:
<!--map-->
data:image/svg+xml;base64,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

<!--success-->
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  • 4.接着我们只需要把对应的 base64 编码发给小程序端,小程序直接放在 image 组件中的 src 属性即可,对于样式来说,可以直接修改 image 的样式来控制 icon 样式,效果如下:

ok~ 还算是比较圆满的完成了任务~

这下产品总不会刁难我了吧~

结语

到此,我们已经 get 到了两种小程序中实现 icon 自定义颜色的解决方案,对比发现,第一种方案的特点是实现起来比较简单,步骤什么的也都还ok,就是拓展性不强,每次改动都需要重新再来一遍,而且对于比较多的图标来说小程序空间占用较大,有一定的局限性,而第二种方案相比于第一种来说虽然在实现过程中稍微繁琐了一些,但是带来的效果是显而易见的,解决了第一种方案的弊端,拓展性什么的都很好,是我比较推荐的,也是我们正在采用的一种方案~

当然,这不过是我的一种实现思路,如果你有关于这方面更好的解决方案记得及时艾特我,我已经迫不及待的等待学习了~

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