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259 lines
5.3 KiB
259 lines
5.3 KiB
<template>
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<view class="promotion">
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<navbar title="面对面分享" leftClick @leftClick="$utils.navigateBack" />
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<view class="promotion-card">
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<image style="width: 100%;" :src="imagePath" mode="widthFix"></image>
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<canvas id="myCanvas" type="2d" canvas-id="firstCanvas1"></canvas>
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</view>
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</view>
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</template>
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<script>
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import {
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mapState
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} from 'vuex'
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export default {
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name: 'Promotion',
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computed: {
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...mapState(['userInfo']),
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},
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data() {
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return {
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url: '',
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title: '123123',
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baseUrl: 'https://dianpin-img.xzaiyp.top/',
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canvas: {},
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imagePath: '',
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}
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},
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onShow() {
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this.getQrCode()
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this.$store.commit('getUserInfo')
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},
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methods: {
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getQrCode() {
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this.$api('getQrCode', 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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let s = this.title || '加油站'
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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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preservationImg(img) {
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let that = this
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uni.authorize({
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/* scope.writePhotosAlbum 类型是保存到相册 */
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scope: 'scope.writePhotosAlbum',
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success() {
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/* 已授权进入 */
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/* 保存图片到相册方法方法 */
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that.imgApi(img);
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},
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complete(res) {
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/* 判断如果没有授权就打开设置选项让用户重新授权 */
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uni.getSetting({
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success(res) {
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if (!res.authSetting['scope.writePhotosAlbum']) {
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/* 打开设置的方法 */
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that.openInstall();
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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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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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.promotion-card {
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width: 90%;
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margin: 100rpx auto 0rpx auto;
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box-shadow: 0rpx 0rpx 15rpx rgba(0, 0, 0, .2);
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border-radius: 15rpx;
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padding: 40rpx 30rpx;
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box-sizing: border-box;
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.user-info {
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display: flex;
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align-items: center;
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.image {
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width: 80rpx;
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height: 80rpx;
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border-radius: 50%;
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margin-right: 10rpx;
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}
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.user-name {
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font-size: 30rpx;
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}
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}
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.invitation-code-img {
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display: flex;
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align-items: center;
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justify-content: center;
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margin: 100rpx 0rpx;
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.image {
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width: 30%;
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border-radius: 50%;
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}
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}
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.invitation-code {
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text-align: center;
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color: #818181;
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font-size: 28rpx;
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}
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}
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.btns {
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position: fixed;
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left: 0;
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bottom: 0;
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width: 100%;
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height: 120rpx;
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display: flex;
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background: #00aaff;
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color: white;
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font-size: 28rpx;
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.btn {
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flex: 1;
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display: flex;
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align-items: center;
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justify-content: center;
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&:nth-child(2) {
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background: orange;
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}
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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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