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204 lines
4.4 KiB
204 lines
4.4 KiB
<template>
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<view class="page">
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<navbar title="邀请好友" leftClick @leftClick="$utils.navigateBack" color="#fff" />
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<view class="flex flex-column content">
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<view style="width: 698rpx; height: 788rpx; border-radius: 16rpx; overflow: hidden;">
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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="tools">
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<button plain class="flex btn" @click="saveImg">
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保存到本地
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</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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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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wxCodeImage: '',
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baseUrl: 'https://image.hhlm1688.com/',
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canvas: {},
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}
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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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this.wxCodeImage = (await this.$fetch('getInviteCode'))?.url
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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 / 698
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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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ctx.fillStyle = '#000000';
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const fontSize = 32 * Ratio / dpr
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ctx.font = `${fontSize}px PingFangSC-regular`;
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const titleX = 285 * Ratio / dpr
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const titleY = 53 * Ratio / dpr
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ctx.fillText('邀请好友', titleX, titleY);
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const codeX = 216 * Ratio / dpr
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const codeY = 645 * Ratio / dpr
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// todo: fetch code
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ctx.fillText(`邀请码：${'YFY1688'}`, codeX, codeY);
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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 = 158 * Ratio / dpr
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const y = 188 * Ratio / dpr
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const size = 382 * 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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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 lang="scss" scoped>
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.page {
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background-color: $uni-bg-color;
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min-height: 100vh;
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/deep/ .nav-bar__view {
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background-image: linear-gradient(#84A73F, #D8FF8F);
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}
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}
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.content {
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align-items: flex-start;
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padding: 48rpx 26rpx;
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}
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.image{
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width: 100%;
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height: 778rpx;
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}
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.tools {
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margin-top: 163rpx;
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width: 100%;
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padding: 0 56rpx;
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box-sizing: border-box;
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.btn {
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width: 100%;
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padding: 29rpx 0;
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color: $uni-text-color-inverse;
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font-size: 28rpx;
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line-height: 40rpx;
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border-radius: 49rpx;
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border: none;
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background-image: linear-gradient(to right, #84A73F, #D8FF8F);
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}
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}
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</style>
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