公司要经常换海报，一个海报要不同的二维码，做一个工具解决一下。

效果图如下

二维码图片的位置和海报大小可以随意调整
直接放代码：

<template><div class="all-tool"><div :style="bgStyle" class="course-container" id="myImage"><div class="course"><img :style="bgStyle" :src="imageUrl" /></div><div :style="codeStyle" class="code"><img :style="ImgStyle" :src="imageUrl1" /></div></div><div class="madin-cha"><div>背景图操作</div><div class="item-user"><span>上传 ：</span><el-uploadclass="avatar-uploader"action="https://jsonplaceholder.typicode.com/posts/":show-file-list="false":on-change="handleAvatarSuccess":auto-upload="false"><img v-if="imageUrl" class="avatar-uploader-icon" :src="imageUrl" alt="" /><i v-else class="el-icon-plus avatar-uploader-icon"></i></el-upload></div><div class="item-user"><span>长 ：</span> <input v-model="widthBg" type="text" /> px</div><div class="item-user"><span>高 ：</span> <input v-model="heightBg" type="text" /> px</div><div>二维码操作</div><div class="item-user"><span>上传 ：</span><el-uploadclass="avatar-uploader"action="https://jsonplaceholder.typicode.com/posts/":show-file-list="false":on-change="handleAvatarSuccess2":auto-upload="false"><img v-if="imageUrl1" class="avatar-uploader-icon" :src="imageUrl1" alt="" /><i v-else class="el-icon-plus avatar-uploader-icon"></i></el-upload></div><div class="item-user"><span>长 ：</span><input v-model="widthImg" type="text" /> px</div><div class="item-user"><span>高 ：</span><input v-model="heightImg" type="text" /> px</div><div class="item-user"><span>距离底部：</span><input v-model="bottomImg" type="text" /> px</div><div class="item-user"><span>距离左边：</span><input v-model="leftP" type="text" /> %</div><div class="item-user"><span>回拉左边：</span><input v-model="leftImg" type="text" /> px</div><div class="btn-all" type="button" @click="save()">合成下载</div><a id="link"></a></div></div>
</template><script>
import html2canvas from "html2canvas";
export default {data() {return {widthBg: 300,heightBg: 500,widthImg: 80,heightImg: 80,bottomImg: 66,leftP: 50,leftImg: 40,imageUrl: "",imageUrl1: "",};},computed: {bgStyle() {return {width: `${this.widthBg}px`,height: `${this.heightBg}px`,};},codeStyle() {return {bottom: ` ${this.bottomImg}px`,left: `${this.leftP}%`,marginLeft: `-${this.leftImg}px`,};},ImgStyle() {return {width: `${this.widthImg}px`,height: `${this.heightImg}px`,};},},created() {},destroyed() {},methods: {save() {html2canvas(document.querySelector("#myImage")).then((canvas) => {var image = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream"); //save as download without name and extension//window.location.href = image;var link = document.getElementById("link");link.setAttribute("download", "haibao.png");link.setAttribute("href",canvas.toDataURL("image/png").replace("image/png", "image/octet-stream"));link.click();});},handleAvatarSuccess(file, fileList) {console.log(file, fileList);this.imageUrl = URL.createObjectURL(file.raw);},handleAvatarSuccess2(file, fileList) {console.log(file, fileList);this.imageUrl1 = URL.createObjectURL(file.raw);},},
};
</script><style scoped>
.all-tool {display: flex;flex-wrap: wrap;width: 100%;justify-content: space-between;background: #fff;height: 1000px;padding: 30px;box-sizing: border-box;
}
.course-container {height: 500px;width: 300px;position: relative;
}
.course {z-index: 1;position: absolute;
}.code {z-index: 2;position: absolute;
}.madin-cha {width: 400px;height: 800px !important;overflow: hidden;
}
.item-user {padding: 10px 30px;display: flex;
}
.item-user span {display: inline-block;width: 80px;text-align: right;
}
.avatar-uploader .el-upload {border: 1px dashed #d9d9d9;border-radius: 6px;cursor: pointer;position: relative;overflow: hidden;
}
.avatar-uploader .el-upload:hover {border-color: #409eff;
}
.avatar-uploader-icon {font-size: 28px;color: #8c939d;width: 178px;height: 178px;line-height: 178px;text-align: center;
}
.avatar {width: 178px;height: 178px;display: block;
}
.avatar-uploader-icon {width: 100px;height: 100px;line-height: 100px;border: 1px solid #ccc;
}
.btn-all {background: rgb(5, 199, 224);text-align: center;padding: 5px;border-radius: 10px;color: #ffff;margin-top: 30px;width: 120px;margin: 30px auto 0;
}
</style>

上面代码若有什么问题可以指出，大家相互学习进步。