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uni_modules/vk-uni-pay/components/vk-uni-qrcode/qrcode.js
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1201
uni_modules/vk-uni-pay/components/vk-uni-qrcode/qrcode.js
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<template xlang="wxml" minapp="mpvue">
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<view class="vk-qrcode" v-if="canvasId && text !== ''">
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<!-- #ifndef MP-ALIPAY -->
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<canvas class="vk-qrcode-canvas" :canvas-id="canvasId" :style="{width:cpSize+'px',height:cpSize+'px'}" />
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<!-- #endif -->
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<!-- #ifdef MP-ALIPAY -->
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<canvas :id="canvasId" :width="cpSize" :height="cpSize" class="vk-qrcode-canvas" />
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<!-- #endif -->
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<view v-if="show === false"></view>
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<image class="vk-qrcode-image" :src="result" :style="{width:cpSize+'px',height:cpSize+'px'}" v-else-if="!loading && result"/>
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<view class="loading-text" :style="'width: '+size+unit+';height: '+size+unit+';'" v-else>
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{{ loadingText }}
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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 QRCode from "./qrcode.js"
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let qrcode;
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export default {
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name: "vk-uni-qrcode",
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props: {
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value: {
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type: String,
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},
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text: {
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type: String,
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default: ''
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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: 'rpx'
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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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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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image: {
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type: String,
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default: ''
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},
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imageSize: {
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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: false
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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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// 让组件强制进入loading状态
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loading: {
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type: Boolean,
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default: false
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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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canvasId:"",
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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.text)) {
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qrcode = new QRCode({
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context: that, // 上下文环境
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canvasId:that.canvasId, // 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.text, // 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.image, // 二维码图标
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imageSize: that.imageSize,// 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.$emit('result', res);
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this.$emit('input', 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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getBase64(){
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return this.result;
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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.text)) {
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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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text: function (n, o) {
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let that = this;
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if (that.onval) {
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if (n != o && !that._empty(n)) {
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if (that.textTimer) clearTimeout(that.textTimer);
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that.textTimer = setTimeout(() => {
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that._makeCode()
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}, 300);
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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 == "rpx"){
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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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this.canvasId = "vk-qrcode-canvas-"+ Math.floor(Math.random()*1000000);
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if (this.loadMake) {
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if (!this._empty(this.text)) {
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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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}
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</script>
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<style scoped>
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.vk-qrcode {
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/* #ifndef APP-VUE */
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display: flex;
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/* #endif */
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position: relative;
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justify-content: center;
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align-items: center;
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flex-direction: column;
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}
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.vk-qrcode-image{
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/* #ifndef APP-VUE */
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display: block;
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/* #endif */
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}
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.loading-text{
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/* #ifndef APP-VUE */
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display: flex;
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/* #endif */
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color: #9a9a9a;
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justify-content: center;
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align-items: center;
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flex-direction: column;
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}
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.vk-qrcode-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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</style>
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