昨天发了微信头像挂红旗的讲解文章，应大家要求，今天录制一套视频，免费送给大家。 我们先来看下效果图 [图片] [图片] [图片] 原理讲解 其实原理很简单，我们用canvas把自己的头像画在最下面，然后把对应的相框模版画到我们头像上面。然后使用小程序自带的api把我们画出来的图片，保存成本地图片文件，然后把这个图片作为我们的微信头像就可以了。 [图片] 免费视频链接 https://www.ixigua.com/i6740973288706540040/ B站免费视频链接 https://www.bilibili.com/video/av69074127/ 腾讯视频免费视频链接 https://v.qq.com/x/page/f3001t402da.html

最近朋友圈里经常有看到这样的头像 [图片] 既然这么火，大家要图又这么难，作为程序员的自己当然要自己动手实现一个。 老规矩，先看效果图 [图片] 仔细研究了下，发现实现起来并不难，核心代码只有下面10行。 [代码] wx.canvasToTempFilePath({ x: 0, y: 0, width: num, height: num, destWidth: num, destHeight: num, canvasId: 'shareImg', success: function(res) { that.setData({ prurl: res.tempFilePath }) wx.hideLoading() }, fail: function(res) { wx.hideLoading() } }) [代码] 一，首先要创建一个小程序 至于如何创建小程序，我这里就不在细讲了，我也有写过创建小程序的文章，也有路过相关的学习视频，去翻下我历史文章找找就行。 二，创建好小程序后，我们就开始来布局 布局很简单，只有下面几行代码。 [代码]<!-- 画布大小按需定制 这里我按照背景图的尺寸定的 --> <canvas canvas-id="shareImg"></canvas> <!-- 预览区域 --> <view class='preview'> <image src='{{prurl}}' mode='aspectFit'></image> <button size='mini' open-type="getUserInfo" bindgetuserinfo="shengcheng" data-k="1">生成头像1</button> <button size='mini' open-type="getUserInfo" bindgetuserinfo="shengcheng" data-k="2">生成头像2</button> <button size='mini' open-type="getUserInfo" bindgetuserinfo="shengcheng" data-k="3">生成头像3</button> <button size='mini' open-type="getUserInfo" bindgetuserinfo="shengcheng" data-k="4">生成头像4</button> <button type='primary' bindtap='save'>保存分享图</button> </view> [代码] 实现效果图如下 [图片] 三，使用canvas来画图 其实我们实现微信头像挂红旗，原理很简单，就是把头像放在下面，然后把有红旗的相框盖在头像上面 [图片] 下面就直接把核心代码贴给大家 [代码]let promise1 = new Promise(function(resolve, reject) { wx.getImageInfo({ src: "../../images/xiaoshitou.jpg", success: function(res) { console.log("promise1", res) resolve(res); } }) }); let promise2 = new Promise(function(resolve, reject) { wx.getImageInfo({ src: `../../images/head${index}.png`, success: function(res) { console.log(res) resolve(res); } }) }); Promise.all([ promise1, promise2 ]).then(res => { console.log("Promise.all", res) //主要就是计算好各个图文的位置 let num = 1125; ctx.drawImage('../../'+res[0].path, 0, 0, num, num) ctx.drawImage('../../' + res[1].path, 0, 0, num, num) ctx.stroke() ctx.draw(false, () => { wx.canvasToTempFilePath({ x: 0, y: 0, width: num, height: num, destWidth: num, destHeight: num, canvasId: 'shareImg', success: function(res) { that.setData({ prurl: res.tempFilePath }) wx.hideLoading() }, fail: function(res) { wx.hideLoading() } }) }) }) [代码] 来看下画出来的效果图 [图片] 四，头像加红旗画好以后，我们就要想办法把图片保存到本地了 [图片] 保存图片的代码也很简单。 [代码]save: function() { var that = this wx.saveImageToPhotosAlbum({ filePath: that.data.prurl, success(res) { wx.showModal({ content: '图片已保存到相册，赶紧晒一下吧~', showCancel: false, confirmText: '好哒', confirmColor: '#72B9C3', success: function(res) { if (res.confirm) { console.log('用户点击确定'); } } }) } }) } [代码] 来看下保存后的效果图 [图片] 到这里，我的微信头像就成功的加上了小红旗了。 [图片] 源码我也已经给大家准备好了，有需要的同学在文末留言即可。 [图片] 后面我准备录制一门视频课程出来，来详细教大家实现这个功能，敬请关注。

以下代码不一定都是本人原创，很多都是借鉴参考的（模仿是第一生产力嘛），有些已忘记出处了。以下分享给大家，供学习参考！欢迎收藏补充，说不定哪天你就用上了！ 一、第一种效果 [图片] [代码]//index.wxml <view class="zr"> <view class='user_box'> <view class='userInfo'> <open-data type="userAvatarUrl"></open-data> </view> <view class='userInfo_name'> <open-data type="userNickName"></open-data> , 欢迎您 </view> </view> <view class="water"> <view class="water-c"> <view class="water-1"> </view> <view class="water-2"> </view> </view> </view> </view> //index.wxss .zr { color: white; background: #4cb4e7; /*#0396FF*/ width: 100%; height: 100px; position: relative; } .water { position: absolute; left: 0; bottom: -10px; height: 30px; width: 100%; z-index: 1; } .water-c { position: relative; } .water-1 { background: url("data:image/svg+xml;base64,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") repeat-x; background-size: 600px; -webkit-animation: wave-animation-1 3.5s infinite linear; animation: wave-animation-1 3.5s infinite linear; } .water-2 { top: 5px; background: url("data:image/svg+xml;base64,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") repeat-x; background-size: 600px; -webkit-animation: wave-animation-2 6s infinite linear; animation: wave-animation-2 6s infinite linear; } .water-1, .water-2 { position: absolute; width: 100%; height: 60px; } .back-white { background: #fff; } @keyframes wave-animation-1 { 0% { background-position: 0 top; } 100% { background-position: 600px top; } } @keyframes wave-animation-2 { 0% { background-position: 0 top; } 100% { background-position: 600px top; } } .user_box { display: flex; z-index: 10000 !important; opacity: 0; /* 透明度*/ animation: love 1.5s ease-in-out; animation-fill-mode: forwards; } .userInfo_name { flex: 1; vertical-align: middle; width: 100%; margin-left: 5%; margin-top: 5%; font-size: 42rpx; } .userInfo { flex: 1; width: 100%; border-radius: 50%; overflow: hidden; max-height: 50px; max-width: 50px; margin-left: 5%; margin-top: 5%; border: 2px solid #fff; } [代码] 二、第二种效果 [图片] [代码]//index.wxml <view class="waveWrapper waveAnimation"> <view class="waveWrapperInner bgTop"> <view class="wave waveTop" style="background-image: url('https://s2.ax1x.com/2019/09/26/um8g7n.png')"></view> </view> <view class="waveWrapperInner bgMiddle"> <view class="wave waveMiddle" style="background-image: url('https://s2.ax1x.com/2019/09/26/umGZ38.png')"></view> </view> <view class="waveWrapperInner bgBottom"> <view class="wave waveBottom" style="background-image: url('https://s2.ax1x.com/2019/09/26/umGuuQ.png')"></view> </view> </view> //index.wxss .waveWrapper { overflow: hidden; position: absolute; left: 0; right: 0; height: 300px; top: 0; margin: auto; } .waveWrapperInner { position: absolute; width: 100%; overflow: hidden; height: 100%; bottom: -1px; background-image: linear-gradient(to top, #86377b 20%, #27273c 80%); } .bgTop { z-index: 15; opacity: 0.5; } .bgMiddle { z-index: 10; opacity: 0.75; } .bgBottom { z-index: 5; } .wave { position: absolute; left: 0; width: 500%; height: 100%; background-repeat: repeat no-repeat; background-position: 0 bottom; transform-origin: center bottom; } .waveTop { background-size: 50% 100px; } .waveAnimation .waveTop { animation: move-wave 3s; -webkit-animation: move-wave 3s; -webkit-animation-delay: 1s; animation-delay: 1s; } .waveMiddle { background-size: 50% 120px; } .waveAnimation .waveMiddle { animation: move_wave 10s linear infinite; } .waveBottom { background-size: 50% 100px; } .waveAnimation .waveBottom { animation: move_wave 15s linear infinite; } @keyframes move_wave { 0% { transform: translateX(0) translateZ(0) scaleY(1) } 50% { transform: translateX(-25%) translateZ(0) scaleY(0.55) } 100% { transform: translateX(-50%) translateZ(0) scaleY(1) } } [代码] 三、第三种效果 [图片] [代码]//index.wxml <view class="container"> <image class="title" src="https://ftp.bmp.ovh/imgs/2019/09/74bada9c4143786a.png"></image> <view class="content"> <view class="hd" style="transform:rotateZ({{angle}}deg);"> <image class="logo" src="https://ftp.bmp.ovh/imgs/2019/09/d31b8fcf19ee48dc.png"></image> <image class="wave" src="wave.png" mode="aspectFill"></image> <image class="wave wave-bg" src="wave.png" mode="aspectFill"></image> </view> <view class="bd" style="height: 100rpx;"> </view> </view> </view> //index.wxss image{ max-width:none; } .container { background: #7acfa6; align-items: stretch; padding: 0; height: 100%; overflow: hidden; } .content{ flex: 1; display: flex; position: relative; z-index: 10; flex-direction: column; align-items: stretch; justify-content: center; width: 100%; height: 100%; padding-bottom: 450rpx; background: -webkit-gradient(linear, left top, left bottom, from(rgba(244,244,244,0)), color-stop(0.1, #f4f4f4), to(#f4f4f4)); opacity: 0; transform: translate3d(0,100%,0); animation: rise 3s cubic-bezier(0.19, 1, 0.22, 1) .25s forwards; } @keyframes rise{ 0% {opacity: 0;transform: translate3d(0,100%,0);} 50% {opacity: 1;} 100% {opacity: 1;transform: translate3d(0,450rpx,0);} } .title{ position: absolute; top: 30rpx; left: 50%; width: 600rpx; height: 200rpx; margin-left: -300rpx; opacity: 0; animation: show 2.5s cubic-bezier(0.19, 1, 0.22, 1) .5s forwards; } @keyframes show{ 0% {opacity: 0;} 100% {opacity: .95;} } .hd { position: absolute; top: 0; left: 50%; width: 1000rpx; margin-left: -500rpx; height: 200rpx; transition: all .35s ease; } .logo { position: absolute; z-index: 2; left: 50%; bottom: 200rpx; width: 160rpx; height: 160rpx; margin-left: -80rpx; border-radius: 160rpx; animation: sway 10s ease-in-out infinite; opacity: .95; } @keyframes sway{ 0% {transform: translate3d(0,20rpx,0) rotate(-15deg); } 17% {transform: translate3d(0,0rpx,0) rotate(25deg); } 34% {transform: translate3d(0,-20rpx,0) rotate(-20deg); } 50% {transform: translate3d(0,-10rpx,0) rotate(15deg); } 67% {transform: translate3d(0,10rpx,0) rotate(-25deg); } 84% {transform: translate3d(0,15rpx,0) rotate(15deg); } 100% {transform: translate3d(0,20rpx,0) rotate(-15deg); } } .wave { position: absolute; z-index: 3; right: 0; bottom: 0; opacity: 0.725; height: 260rpx; width: 2250rpx; animation: wave 10s linear infinite; } .wave-bg { z-index: 1; animation: wave-bg 10.25s linear infinite; } @keyframes wave{ from {transform: translate3d(125rpx,0,0);} to {transform: translate3d(1125rpx,0,0);} } @keyframes wave-bg{ from {transform: translate3d(375rpx,0,0);} to {transform: translate3d(1375rpx,0,0);} } .bd { position: relative; flex: 1; display: flex; flex-direction: column; align-items: stretch; animation: bd-rise 2s cubic-bezier(0.23,1,0.32,1) .75s forwards; opacity: 0; } @keyframes bd-rise{ from {opacity: 0; transform: translate3d(0,60rpx,0); } to {opacity: 1; transform: translate3d(0,0,0); } } [代码] wave.png（可下载到本地） [图片] 在这个基础上，再加上js的代码，即可实现根据手机倾向，水波晃动的效果 wx.onAccelerometerChange(function callback) 监听加速度数据事件。 [图片] [代码]//index.js Page({ onReady: function () { var _this = this; wx.onAccelerometerChange(function (res) { var angle = -(res.x * 30).toFixed(1); if (angle > 14) { angle = 14; } else if (angle < -14) { angle = -14; } if (_this.data.angle !== angle) { _this.setData({ angle: angle }); } }); }, }); [代码] 四、第四种效果 [图片] [代码]//index.wxml <view class='page__bd'> <view class="bg-img padding-tb-xl" style="background-image:url('http://wx4.sinaimg.cn/mw690/006UdlVNgy1g2v2t1ih8jj31hc0p0qej.jpg');background-size:cover;"> <view class="cu-bar"> <view class="content text-bold text-white"> 悦拍屋 </view> </view> </view> <view class="shadow-blur"> <image src="https://raw.githubusercontent.com/weilanwl/ColorUI/master/demo/images/wave.gif" mode="scaleToFill" class="gif-black response" style="height:100rpx;margin-top:-100rpx;"></image> </view> </view> //index.wxss @import "colorui.wxss"; .gif-black { display: block; border: none; mix-blend-mode: screen; } [代码] 本效果需要引入ColorUI组件库