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193 lines
4.3 KiB
193 lines
4.3 KiB
<template>
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<view class="page">
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<navbar title="分享好友" leftClick @leftClick="$utils.navigateBack" />
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<view class="flex content">
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<view style="width: 598rpx; height: 1063rpx;">
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<canvas id="myCanvas" canvas-id="firstCanvas1" type="2d" style="width: 100%; height: 100%;"></canvas>
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</view>
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<view class="flex btns">
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<button class="flex btn btn-back" @click="$utils.navigateBack">返回</button>
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<button plain class="flex btn btn-save" @click="saveImg" >保存到相册</button>
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</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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data() {
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return {
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wxCodeImage: null,
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canvas: {},
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}
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},
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computed : {
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...mapState(['configList'])
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},
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onLoad() {
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},
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onReady() {
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this.fetchQrCode()
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},
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methods: {
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async fetchQrCode() {
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try {
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const url = (await this.$fetch('getQrCode'))?.url
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this.wxCodeImage = this.$config.aliOss.url + url
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console.log('--wxCodeImage', this.wxCodeImage)
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this.draw()
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} catch (err) {
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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(async (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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console.log("--dpr", dpr)
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canvas.width = width * dpr
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canvas.height = height * dpr
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let Ratio = canvas.width / 598
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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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//背景图片
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const bgImage = canvas.createImage()
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bgImage.src = this.configList.index_lvxing || 'https://image.hhlm1688.com//upload/组3833x_1742803627396.png'
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bgImage.onload = () => {
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ctx.drawImage(bgImage, 0, 0, width, height)
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//二维码图片
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const coderImage = canvas.createImage()
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coderImage.src = this.wxCodeImage
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coderImage.onload = () => {
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const x = 197 * Ratio / dpr
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const y = 562 * Ratio / dpr
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const size = 206 * Ratio / dpr
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ctx.drawImage(coderImage, x, y, size, size)
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uni.hideLoading()
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}
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}
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})
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},
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saveImg(){
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this.$authorize('scope.writePhotosAlbum').then((res) => {
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this.imgApi()
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})
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},
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imgApi() {
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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: this.canvas,
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success: (res) => {
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let tempFilePath = res.tempFilePath;
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this.saveImgToPhone(tempFilePath)
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},
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fail: (err) => {
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console.log('--canvasToTempFilePath--fail', err)
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}
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}, this);
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},
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saveImgToPhone(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 scoped lang="scss">
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.page {
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background-color: #111317;
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height: 100vh;
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}
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.content {
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margin-top: 79rpx;
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flex-direction: column;
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}
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.btns {
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justify-content: space-between;
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margin-top: 53rpx;
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width: 598rpx;
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}
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.btn {
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display: inline-flex;
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width: 280rpx;
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height: 90rpx;
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font-size: 36rpx;
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line-height: 1;
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color: #FFFFFF;
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border-radius: 45rpx;
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margin: 0;
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&-back {
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background-color: #4E5053;
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}
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&-save {
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background-image: linear-gradient(to right, #02DED6, #05D9A2);
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}
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}
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</style>
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