124 lines
3.0 KiB
Vue
124 lines
3.0 KiB
Vue
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<template>
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<view class="page">
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<u-navbar title="设备二维码" :border-bottom="false" :background="bgc" title-color='#000'
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title-size='36' height='45'></u-navbar>
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<view class="ewm" style="margin-top: 300rpx;width: 750rpx;display: flex;justify-content: center;">
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<canvas id="qrcode" canvas-id="qrcode" style="width: 600rpx;height:700rpx;" />
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</view>
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<view class="saveQr" @click="saveQrcode()">
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保存二维码
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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 UQRCode from 'uqrcodejs';
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export default {
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data() {
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return {
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sn:'',
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deptId:null
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}
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},
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onLoad(e) {
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this.sn = e.sn;
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this.deptId = uni.getStorageSync('deptId');
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this.generateQrcode();
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},
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methods: {
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generateQrcode() {
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const qr = new UQRCode();
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const qrSizeRpx = 600; // 二维码大小为600rpx
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const qrSizePx = uni.upx2px(qrSizeRpx); // 将rpx转换为px
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if (this.deptId == 100) {
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qr.data = 'https://dche.ccttiot.com?sn=' + this.sn;
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} else if (this.deptId == 101) {
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qr.data = 'https://dianche.chuantewulian.cn?sn=' + this.sn;
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}
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qr.size = qrSizePx; // 设置二维码大小为像素值
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// 创建 canvas 上下文
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const ctx = uni.createCanvasContext('qrcode', this);
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// 设置 qr 的 canvas 上下文
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qr.canvasContext = ctx;
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qr.make(); // 生成二维码数据
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// 绘制二维码
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qr.drawCanvas();
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// 手动绘制二维码的同时添加设备序列号（sn）
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const sn = this.sn ? 'SN: ' + this.sn : 'SN未知';
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// 延迟绘制，确保二维码绘制完成后再绘制文字
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setTimeout(() => {
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// 添加sn到二维码下面
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ctx.setFontSize(24); // 设置字体大小
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ctx.setFillStyle('black'); // 设置字体颜色
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ctx.setTextAlign('center'); // 设置文本居中
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// 在二维码下方绘制sn，调整y坐标确保sn显示在二维码下方且不被裁剪
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ctx.fillText(sn, qrSizePx / 2, qrSizePx + 40);
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// 传入 true，保留之前绘制的内容
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ctx.draw(true);
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}, 100); // 延迟100毫秒确保二维码绘制完成
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this.showqr = true;
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},
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saveQrcode() {
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uni.canvasToTempFilePath({
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canvasId: 'qrcode',
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x: 0,
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y: 0,
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width: uni.upx2px(600),
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height: uni.upx2px(700),
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success: (res) => {
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uni.saveImageToPhotosAlbum({
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filePath: res.tempFilePath,
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success: () => {
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uni.showToast({
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title: '保存成功',
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icon: 'success'
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});
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this.showqr = false;
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},
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fail: (err) => {
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uni.showToast({
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title: '保存失败',
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icon: 'none'
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});
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}
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});
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},
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fail: (err) => {
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uni.showToast({
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title: '生成二维码失败',
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icon: 'none'
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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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</script>
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<style lang="scss">
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.page{
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.saveQr{
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margin: 0 auto;
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margin-top: 100rpx;
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display: flex;
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align-items: center;
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justify-content: center;
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width: 502rpx;
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height: 68rpx;
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background: #4C97E7;
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border-radius: 10rpx 10rpx 10rpx 10rpx;
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font-weight: 500;
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font-size: 36rpx;
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color: #FFFFFF;
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}
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}
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</style>
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