| 提交 | 用户 | age | ||
| 2f6253 | 1 | <template> |
| 陈 | 2 | <div> |
| 3 | <component :is="tag" ref="wrapRef"></component> | |
| 4 | </div> | |
| 5 | </template> | |
| 6 | <script lang="ts"> | |
| 7 | import { defineComponent, watchEffect, PropType, ref, unref } from 'vue'; | |
| 8 | import { toCanvas, QRCodeRenderersOptions, LogoType } from './qrcodePlus'; | |
| 9 | import { toDataURL } from 'qrcode'; | |
| 661db0 | 10 | import { downloadByUrl } from '/@/utils/file/download'; |
| 2f6253 | 11 | |
| 陈 | 12 | export default defineComponent({ |
| 13 | name: 'QrCode', | |
| 14 | emits: { done: (url: string) => !!url, error: (error: any) => !!error }, | |
| 15 | props: { | |
| 16 | value: { | |
| 17 | type: [String, Array] as PropType<string | any[]>, | |
| 18 | default: null, | |
| 19 | }, | |
| 20 | // 参数 | |
| 21 | options: { | |
| 22 | type: Object as PropType<QRCodeRenderersOptions>, | |
| 23 | default: null, | |
| 24 | }, | |
| 25 | // 宽度 | |
| 26 | width: { | |
| 27 | type: Number as PropType<number>, | |
| 28 | default: 200, | |
| 29 | }, | |
| 30 | // 中间logo图标 | |
| 31 | logo: { | |
| 32 | type: [String, Object] as PropType<Partial<LogoType> | string>, | |
| 33 | default: '', | |
| 34 | }, | |
| 35 | // img 不支持内嵌logo | |
| 36 | tag: { | |
| 37 | type: String as PropType<'canvas' | 'img'>, | |
| 38 | default: 'canvas', | |
| 39 | validator: (v: string) => ['canvas', 'img'].includes(v), | |
| 40 | }, | |
| 41 | }, | |
| 42 | setup(props, { emit }) { | |
| 43 | const wrapRef = ref<HTMLCanvasElement | HTMLImageElement | null>(null); | |
| 44 | const urlRef = ref<string>(''); | |
| 45 | async function createQrcode() { | |
| 46 | try { | |
| 47 | const { tag, value, options = {}, width, logo } = props; | |
| 48 | const renderValue = String(value); | |
| 49 | const wrapEl = unref(wrapRef); | |
| 50 | ||
| 51 | if (!wrapEl) return; | |
| 52 | ||
| 53 | if (tag === 'canvas') { | |
| 54 | const url: string = await toCanvas({ | |
| 55 | canvas: wrapEl, | |
| 56 | width, | |
| 57 | logo: logo as any, | |
| 58 | content: renderValue, | |
| 59 | options: options || {}, | |
| 60 | }); | |
| 61 | urlRef.value = url; | |
| 62 | emit('done', url); | |
| 63 | return; | |
| 64 | } | |
| 65 | ||
| 66 | if (tag === 'img') { | |
| 67 | const url = await toDataURL(renderValue, { | |
| 68 | errorCorrectionLevel: 'H', | |
| 69 | width, | |
| 70 | ...options, | |
| 71 | }); | |
| 72 | (unref(wrapRef) as HTMLImageElement).src = url; | |
| 73 | urlRef.value = url; | |
| 74 | emit('done', url); | |
| 75 | } | |
| 76 | } catch (error) { | |
| 77 | emit('error', error); | |
| 78 | } | |
| 79 | } | |
| 80 | /** | |
| 81 | * file download | |
| 82 | */ | |
| 83 | function download(fileName?: string) { | |
| 84 | const url = unref(urlRef); | |
| 85 | if (!url) return; | |
| 86 | downloadByUrl({ | |
| 87 | url, | |
| 88 | fileName, | |
| 89 | }); | |
| 90 | } | |
| 91 | ||
| 92 | watchEffect(() => { | |
| 93 | setTimeout(() => { | |
| 94 | createQrcode(); | |
| 95 | }, 30); | |
| 96 | }); | |
| 97 | ||
| 98 | return { wrapRef, download }; | |
| 99 | }, | |
| 100 | }); | |
| 101 | </script> | |
