gree_leran/node_modules/uview-plus/components/u-qrcode/u-qrcode.vue

200 lines
3.8 KiB
Vue

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