200 lines
3.8 KiB
Vue
200 lines
3.8 KiB
Vue
<template>
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<view class="u-qrcode">
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<canvas class="u-qrcode__canvas" :id="cid" :canvas-id="cid" :style="{ width: size + unit, height: size + unit }" />
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<image v-show="show" :src="result" :style="{ width: size + unit, height: size + unit }" />
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</view>
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</template>
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<script>
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import QRCode from "./qrcode.js"
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let qrcode
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export default {
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name: "u-qrcode",
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props: {
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cid: {
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type: String,
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default: 'u-qrcode-canvas' + Math.random().toString()
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},
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size: {
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type: Number,
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default: 200
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},
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unit: {
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type: String,
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default: 'px'
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},
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show: {
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type: Boolean,
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default: true
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},
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val: {
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type: String,
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default: ''
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},
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background: {
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type: String,
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default: '#ffffff'
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},
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foreground: {
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type: String,
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default: '#000000'
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},
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pdground: {
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type: String,
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default: '#000000'
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},
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icon: {
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type: String,
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default: ''
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},
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iconSize: {
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type: Number,
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default: 40
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},
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lv: {
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type: Number,
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default: 3
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},
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onval: {
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type: Boolean,
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default: true
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},
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loadMake: {
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type: Boolean,
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default: true
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},
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usingComponents: {
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type: Boolean,
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default: true
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},
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showLoading: {
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type: Boolean,
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default: true
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},
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loadingText: {
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type: String,
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default: '二维码生成中'
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},
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},
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data() {
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return {
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result: '',
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}
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},
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methods: {
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_makeCode() {
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let that = this
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if (!this._empty(this.val)) {
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qrcode = new QRCode({
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context: that, // 上下文环境
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canvasId: that.cid, // canvas-id
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usingComponents: that.usingComponents, // 是否是自定义组件
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showLoading: that.showLoading, // 是否显示loading
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loadingText: that.loadingText, // loading文字
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text: that.val, // 生成内容
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size: that.size, // 二维码大小
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background: that.background, // 背景色
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foreground: that.foreground, // 前景色
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pdground: that.pdground, // 定位角点颜色
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correctLevel: that.lv, // 容错级别
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image: that.icon, // 二维码图标
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imageSize: that.iconSize,// 二维码图标大小
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cbResult: function (res) { // 生成二维码的回调
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that._result(res)
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},
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});
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} else {
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uni.showToast({
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title: '二维码内容不能为空',
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icon: 'none',
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duration: 2000
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});
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}
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},
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_clearCode() {
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this._result('')
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qrcode.clear()
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},
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_saveCode() {
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let that = this;
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if (this.result != "") {
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uni.saveImageToPhotosAlbum({
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filePath: that.result,
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success: function () {
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uni.showToast({
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title: '二维码保存成功',
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icon: 'success',
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duration: 2000
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});
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}
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});
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}
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},
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_result(res) {
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this.result = res;
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this.$emit('result', res)
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},
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_empty(v) {
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let tp = typeof v,
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rt = false;
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if (tp == "number" && String(v) == "") {
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rt = true
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} else if (tp == "undefined") {
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rt = true
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} else if (tp == "object") {
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if (JSON.stringify(v) == "{}" || JSON.stringify(v) == "[]" || v == null) rt = true
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} else if (tp == "string") {
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if (v == "" || v == "undefined" || v == "null" || v == "{}" || v == "[]") rt = true
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} else if (tp == "function") {
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rt = false
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}
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return rt
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}
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},
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watch: {
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size: function (n, o) {
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if (n != o && !this._empty(n)) {
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this.cSize = n
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if (!this._empty(this.val)) {
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setTimeout(() => {
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this._makeCode()
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}, 100);
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}
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}
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},
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val: function (n, o) {
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if (this.onval) {
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if (n != o && !this._empty(n)) {
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setTimeout(() => {
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this._makeCode()
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}, 0);
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}
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}
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}
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},
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computed: {
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},
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mounted: function () {
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if (this.loadMake) {
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if (!this._empty(this.val)) {
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setTimeout(() => {
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this._makeCode()
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}, 0);
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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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.u-qrcode {
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position: relative;
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&__canvas {
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position: fixed;
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top: -99999rpx;
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left: -99999rpx;
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z-index: -99999;
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}
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}
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</style>
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