232 lines
6.3 KiB
Vue
232 lines
6.3 KiB
Vue
<template xlang="wxml" minapp="mpvue">
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<view class="tki-qrcode">
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<!-- #ifndef MP-ALIPAY -->
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<canvas
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class="tki-qrcode-canvas"
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:canvas-id="cid"
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:style="{ width: cpSize + 'px', height: cpSize + 'px' }"
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/>
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<!-- #endif -->
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<!-- #ifdef MP-ALIPAY -->
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<canvas :id="cid" :width="cpSize" :height="cpSize" class="tki-qrcode-canvas" />
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<!-- #endif -->
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<image
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v-show="show"
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:src="result"
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:style="{ width: cpSize + 'px', height: cpSize + 'px' }"
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/>
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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: 'tki-qrcode',
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props: {
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cid: {
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type: String,
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default: 'tki-qrcode-canvas'
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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: 'upx'
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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: 'asfsdfsdf'
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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: false
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},
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loadMake: {
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type: Boolean,
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default: false
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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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const that = this
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if (!this._empty(this.val)) {
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try {
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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.cpSize, // 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) {
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// 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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} catch (e) {
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console.log(e)
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//TODO handle the exception
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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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const 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: {
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handler(n, o) {
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console.log(n, '为什么！！！！！！！！')
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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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immediate: true
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},
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val(n, o) {
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console.log(n, '为什么！！！！！！！！')
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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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cpSize() {
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if (this.unit == 'upx') {
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return uni.upx2px(this.size)
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} else {
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return this.size
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}
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}
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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>
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.tki-qrcode {
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position: relative;
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}
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.tki-qrcode-canvas {
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position: fixed;
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top: -99999upx;
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left: -99999upx;
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z-index: -99999;
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}
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</style>
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