唯一码图形对接以及退出登录
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60
components/BarcodeGenerator.vue
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60
components/BarcodeGenerator.vue
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<!-- components/BarcodeGenerator.vue -->
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<template>
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<div class="barcode-container">
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<canvas v-if="type === 'canvas'" ref="barcodeRef"></canvas>
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<svg v-else ref="barcodeRef"></svg>
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</div>
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</template>
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<script setup>
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import { ref, watch, onMounted, defineProps, defineEmits } from 'vue';
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import JsBarcode from 'jsbarcode';
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// 定义Props(外部传参)
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const props = defineProps({
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value: { // 条形码内容
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type: String,
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required: true
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},
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format: { // 条形码格式
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type: String,
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default: 'CODE128'
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},
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type: { // 渲染类型
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type: String,
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default: 'canvas',
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validator: (val) => ['canvas', 'svg'].includes(val)
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},
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options: { // 自定义配置
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type: Object,
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default: () => ({
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width: 2,
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height: 100,
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displayValue: true
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})
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}
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})
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// 定义DOM引用
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const barcodeRef = ref(null)
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// 生成条形码
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const generate = () => {
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if (!barcodeRef.value) return
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// 合并默认配置和外部配置
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const finalOptions = { ...props.options, format: props.format }
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// 清空Canvas(SVG无需清空)
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if (props.type === 'canvas') {
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const ctx = barcodeRef.value.getContext('2d')
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ctx.clearRect(0, 0, barcodeRef.value.width, barcodeRef.value.height)
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}
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// 生成条形码
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JsBarcode(barcodeRef.value, props.value, finalOptions)
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}
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// 挂载后初始化
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onMounted(generate)
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// 监听props变化,自动更新
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watch([() => props.value, () => props.format, () => props.options], generate, { deep: true })
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</script>
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