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216 lines
4.9 KiB
216 lines
4.9 KiB
<template>
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<view class="promotion">
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<navbar title="二维码"
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bgColor="#E3441A"
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color="#fff"
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leftClick @leftClick="$utils.navigateBack" />
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<view class="promotion-card">
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<image :src="userInfo.headImage" mode="aspectFill"
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class="headImage"></image>
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<image style="width: 100%;" :src="imagePath" mode="widthFix"></image>
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<!-- <view class="invitation-code">加油站: {{ title }}</view> -->
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<canvas id="myCanvas" type="2d" canvas-id="firstCanvas1"></canvas>
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<view class="uni-color-btn"
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@click="preservationImg(imagePath)">保存二维码</view>
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</view>
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</view>
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</template>
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<script>
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import { mapState } from 'vuex'
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export default {
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name: 'Promotion',
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computed: {
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...mapState(['userInfo']),
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},
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data() {
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return {
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url: '',
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title: '',
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baseUrl: 'https://image.hhlm1688.com/',
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canvas: {},
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imagePath: '',
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}
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},
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onShow() {
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this.getQrCode()
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this.$store.commit('getUserInfo')
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},
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methods: {
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getQrCode() {
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this.$api('getInviteCode', res => {
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if (res.code == 200) {
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this.url = res.result.url
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this.title = res.result.name
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this.draw()
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}
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})
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},
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draw() {
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uni.showLoading({
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title: "拼命绘画中..."
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})
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wx.createSelectorQuery()
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.select('#myCanvas') // 绘制的canvas的id
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.fields({
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node: true,
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size: true
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})
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.exec((res) => {
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const canvas = res[0].node
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// 渲染上下文
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const ctx = canvas.getContext('2d')
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// Canvas 画布的实际绘制宽高
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const width = res[0].width
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const height = res[0].height
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// 初始化画布大小
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const dpr = wx.getWindowInfo().pixelRatio
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//根据dpr调整
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// dpr 2 4
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// 3 6
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let Ratio = dpr * 2
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console.log("bug", dpr)
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canvas.width = width * dpr
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canvas.height = height * dpr
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this.canvas = canvas
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ctx.scale(dpr, dpr)
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ctx.clearRect(0, 0, width, height)
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ctx.fillStyle = '#fff'
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ctx.fillRect(0, 0, canvas.width, canvas.height)
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//用户图片
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// const image = canvas.createImage()
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// image.onload = () => {
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// ctx.drawImage(image, 30, 18, 40, 40)
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// }
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// image.src = '/public/img/wechar_1.png'
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// image.src = this.userInfo.headImage
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ctx.fillStyle = 'black'
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ctx.font = '22px PingFangSC-regular';
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// 绘制用户姓名
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// let nickName = this.userInfo.nickName || '绘制用户姓名'
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// ctx.fillText(nickName, canvas.width / Ratio - nickName.length * 11, 40);
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// ctx.font = '18px PingFangSC-regular';
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// 绘制欢迎语
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let s = this.title || ''
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ctx.fillText(s, canvas.width / Ratio - s.length * 11, 50);
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//二维码图片
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const coderImage = canvas.createImage()
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coderImage.src = this.baseUrl + this.url
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coderImage.onload = () => {
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ctx.drawImage(coderImage,
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canvas.width / Ratio - 240 / 2, 100, 240, 240)
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}
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// 绘制完成后存储路径
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setTimeout(() => {
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wx.canvasToTempFilePath({
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x: 0,
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y: 0,
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width: this.canvas.width,
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height: this.canvas.height,
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canvas,
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success: (res) => {
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var tempFilePath = res.tempFilePath;
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this.imagePath = tempFilePath
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uni.hideLoading()
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}
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});
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}, 600);
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})
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},
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back() {
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uni.navigateBack(-1)
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},
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async preservationImg(img) {
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await this.$authorize('scope.writePhotosAlbum')
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this.imgApi(img);
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},
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imgApi(image) {
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/* 获取图片的信息 */
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uni.getImageInfo({
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src: image,
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success: function(image) {
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/* 保存图片到手机相册 */
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uni.saveImageToPhotosAlbum({
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filePath: image.path,
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success: function() {
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uni.showModal({
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title: '保存成功',
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content: '图片已成功保存到相册',
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showCancel: false
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});
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},
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complete(res) {
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console.log(res);
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}
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});
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}
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});
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},
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}
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}
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</script>
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<style lang="scss" scoped>
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.promotion {
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width: 100%;
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height: 100vh;
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background-color: $uni-color;
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.promotion-card {
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width: 90%;
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margin: 140rpx auto 0rpx auto;
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box-shadow: 0rpx 0rpx 15rpx rgba(0, 0, 0, .2);
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border-radius: 40rpx;
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padding: 40rpx 30rpx;
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box-sizing: border-box;
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background-color: #fff;
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position: relative;
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padding-top: 100rpx;
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.headImage{
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position: absolute;
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height: 180rpx;
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width: 180rpx;
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border-radius: 50%;
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top: -80rpx;
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left: 50%;
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transform: translate(-50%);
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border: 10rpx solid #fff;
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box-shadow: 0 0 10rpx 10rpx #00000013;
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}
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}
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}
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#myCanvas {
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position: fixed;
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left: 100%;
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/* visibility: hidden */
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/* visibility: hidden; */
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/* margin-top: 100rpx; */
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margin: 68rpx auto;
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width: 750rpx;
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height: 750rpx;
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/* line-height: 20px; */
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background-color: rgba(255, 255, 255, 1);
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text-align: center;
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}
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</style>
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