355 lines
8.6 KiB
Vue
355 lines
8.6 KiB
Vue
<template>
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<view :style="viewColor">
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<view class='poster-poster' v-if="posterStatus">
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<view class='poster-pop'>
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<image src='../../../static/images/poster-close.png' class='close' @click="posterImageClose"></image>
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<view class="user-code">
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<image class="canvas" :style="{width:wd+'px', height:hg+'px'}" :src="posterImage" v-if="posterImage"></image>
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<canvas class="canvas" :style="{width:wd+'px',height:hg+'px'}" canvas-id="myCanvas" v-else></canvas>
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</view>
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<!-- #ifndef H5 -->
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<view v-if="posterImage" class='save-poster' @click="savePosterPath(posterImage)">保存到手机</view>
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<!-- #endif -->
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<!-- #ifdef H5 -->
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<view v-if="posterImage" class="keep">长按图片可以保存到手机</view>
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<!-- #endif -->
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</view>
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</view>
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<view class='mask' v-if="posterImage"></view>
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</view>
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</template>
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<script>
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import { imgToBase } from '@/api/user.js';
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import { mapGetters } from 'vuex';
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export default {
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computed: mapGetters(['viewColor']),
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data() {
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return {
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wd: 225,
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hg: 357,
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posterImage: "",
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posterBag: '../static/images/poster-bag.png',
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}
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},
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props: {
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picData: {
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type: Object
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},
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posterStatus: {
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type: Boolean,
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default: false
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}
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},
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watch: {
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posterStatus(data) {
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if (data) {
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this.posterShow()
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}
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},
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},
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onLoad() {},
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methods: {
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async posterShow() {
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let that = this;
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uni.showLoading({
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title: '海报生成中',
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mask: true
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});
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let arr, bag_pic, goods_img, mp_code
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goods_img = await that.imgToBase(that.picData.goodsPic)
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mp_code = await that.imgToBase(that.picData.codePic)
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// #ifdef H5
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arr = [that.posterBag, goods_img, mp_code]
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// #endif
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// #ifdef MP || APP-PLUS
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arr = [that.posterBag, await that.downloadFilestoreImage(that.picData.goodsPic), await that.downloadFilestoreImage(
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that.picData.codePic)]
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// #endif
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that.bargainPosterCanvas(arr, that.picData.title, that.picData.label, that.picData.msg, that.picData.price,
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that.wd,
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that.hg,
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(tempFilePath) => {
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that.posterImage = tempFilePath
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});
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},
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async imgToBase(url) {
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let res = await imgToBase({
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image: url
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})
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return res.data.image
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},
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savePosterPath(url) {
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let that = this;
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// #ifdef MP
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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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uni.authorize({
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scope: 'scope.writePhotosAlbum',
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success() {
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uni.saveImageToPhotosAlbum({
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filePath: url,
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success: function(res) {
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that.$util.Tips({
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title: '保存成功',
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icon: 'success'
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});
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},
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fail: function(res) {
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that.$util.Tips({
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title: '保存失败'
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});
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}
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});
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}
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});
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} else {
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uni.saveImageToPhotosAlbum({
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filePath: url,
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success: function(res) {
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that.$util.Tips({
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title: '保存成功',
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icon: 'success'
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});
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},
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fail: function(res) {
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that.$util.Tips({
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title: '保存失败'
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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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// #endif
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// #ifdef APP-PLUS
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uni.saveImageToPhotosAlbum({
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filePath: that.posterImage,
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success: function(res) {
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that.posterImageClose();
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that.$util.Tips({
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title: '保存成功',
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icon: 'success'
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});
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},
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fail: function(res) {
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that.$util.Tips({
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title: '保存失败'
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});
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},
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})
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// #endif
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},
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posterImageClose() {
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this.$emit('update:posterStatus', false)
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this.posterImage = ""
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},
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//图片转符合安全域名路径
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downloadFilestoreImage(url) {
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// #ifdef MP
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let ishttps = url.split('//')[0] == 'https:'
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if (!ishttps) {
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url = 'https://'+url.split('//')[1]
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}
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// #endif
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return new Promise((resolve, reject) => {
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let that = this;
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uni.downloadFile({
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url: url,
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success: function(res) {
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resolve(res.tempFilePath);
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},
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fail: function() {
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return that.$util.Tips({
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title: ''
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});
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}
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});
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})
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},
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bargainPosterCanvas(arr2, title, label, msg, price, wd, hg, successFn) {
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let that = this;
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const ctx = uni.createCanvasContext('myCanvas', this);
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ctx.clearRect(0, 0, 0, 0);
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/**
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* 只能获取合法域名下的图片信息,本地调试无法获取
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*
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*/
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ctx.fillStyle = '#ccc';
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ctx.fillRect(0, 0, wd, hg);
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uni.getImageInfo({
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src: arr2[0],
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success: (res) => {
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console.log(arr2)
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const WIDTH = res.width;
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const HEIGHT = res.height;
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ctx.drawImage(arr2[0], 0, 0, wd, hg);
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// 保证在不同机型对应坐标准确
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let labelx = 0.6656 //标签x
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let labely = 0.167 //标签y
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let pricex = 0.1847 //价格x
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let pricey = 0.175 //价格y
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let codex = 0.385 //二维码
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let codey = 0.77
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let picturex = 0.1571 //商品图左上点
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let picturey = 0.2916
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let picturebx = 0.6857 //商品图右下点
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let pictureby = 0.3916
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let msgx = 0.1036 //msg
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let msgy = 0.2306
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ctx.drawImage(arr2[1], wd * picturex, hg * picturey, wd * picturebx, hg * pictureby);
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ctx.save();
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ctx.drawImage(arr2[2], wd * codex, hg * codey, 55, 55);
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ctx.save();
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//标题
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const CONTENT_ROW_LENGTH = 30;
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let [contentLeng, contentArray, contentRows] = that.textByteLength(title, CONTENT_ROW_LENGTH);
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if (contentRows > 2) {
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contentRows = 2;
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let textArray = contentArray.slice(0, 2);
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textArray[textArray.length - 1] += '…';
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contentArray = textArray;
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}
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ctx.setTextAlign('left');
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ctx.setFillStyle('#000');
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if (contentArray.length < 2) {
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ctx.setFontSize(14);
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} else {
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ctx.setFontSize(12);
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}
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let contentHh = 3;
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for (let m = 0; m < contentArray.length; m++) {
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if (m) {
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ctx.fillText(contentArray[m], 20, 20 + contentHh * m + 13, 1100);
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} else {
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ctx.fillText(contentArray[m], 20, 20, 1100);
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}
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}
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// 标签内容
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ctx.setTextAlign('left')
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ctx.setFontSize(10);
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ctx.setFillStyle('#FFF');
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ctx.fillText(label, wd * labelx, hg * labely);
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ctx.save();
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// 价格
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ctx.setFillStyle('red');
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// ctx.setFontSize(16);
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ctx.font = "bold 18px Arial";
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ctx.fillText(price, wd * pricex, hg * pricey);
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ctx.save();
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// msg
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ctx.setFontSize(8);
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ctx.setFillStyle('#3F3F3F');
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ctx.fillText(msg, wd * msgx, hg * msgy);
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ctx.save();
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ctx.draw(true, () => {
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uni.canvasToTempFilePath({
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canvasId: 'myCanvas',
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fileType: 'png',
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quality: 1,
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success: (res) => {
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console.log(res)
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successFn && successFn(res.tempFilePath);
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uni.hideLoading();
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}
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}, this)
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});
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},
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fail: function(err) {
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uni.hideLoading();
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that.Tips({
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title: '无法获取图片信息'
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});
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}
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})
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},
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textByteLength(text, num) {
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let strLength = 0;
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let rows = 1;
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let str = 0;
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let arr = [];
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for (let j = 0; j < text.length; j++) {
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if (text.charCodeAt(j) > 255) {
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strLength += 2;
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if (strLength > rows * num) {
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strLength++;
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arr.push(text.slice(str, j));
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str = j;
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rows++;
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}
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} else {
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strLength++;
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if (strLength > rows * num) {
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arr.push(text.slice(str, j));
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str = j;
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rows++;
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}
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}
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}
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arr.push(text.slice(str, text.length));
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return [strLength, arr, rows] // [处理文字的总字节长度，每行显示内容的数组，行数]
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},
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}
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}
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</script>
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<style>
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.poster-poster {
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width: 100%;
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height: 100%;
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width: 450rpx;
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height: 714rpx;
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}
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.poster-pop {
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position: fixed;
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left: 50%;
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transform: translateX(-50%);
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top: 50%;
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margin: 0 auto;
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margin-top: -357rpx;
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z-index: 999;
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}
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.poster-pop image {
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width: 100%;
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height: 100%;
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display: block;
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}
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.poster-pop .close {
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width: 46rpx;
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height: 75rpx;
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position: fixed;
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right: 0;
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top: -73rpx;
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display: block;
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z-index: 3999;
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}
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.poster-pop .save-poster {
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background-color: var(--view-theme);
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font-size: ：22rpx;
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color: #fff;
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text-align: center;
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height: 76rpx;
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line-height: 76rpx;
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width: 100%;
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margin-top: 20rpx;
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}
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.poster-pop .keep {
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color: #fff;
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text-align: center;
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font-size: 25rpx;
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margin-top: 10rpx;
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}
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.mask {
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z-index: 300 !important;
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position: fixed;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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background-color: rgba(0, 0, 0, 0.6);
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z-index: 9;
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}
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</style>
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