抽奖

src/components/yan-qr/yan-qr.vue

@@ -0,0 +1,115 @@
+<template>
+	<view>
+		<canvas :canvas-id="canvasId" v-show="qrShow" :style="qrShowStyle" />
+	</view>
+</template>
+
+<script>
+	import uQRCode from './qrcode.js'
+	export default {
+		props: {
+			canvasId: {
+				type: String,
+				default: 'qrcode' //canvas-id
+			},
+			text: {
+				type: String,
+				default: 'hello' //二维码内容
+			},
+			size: {
+				type: Number,
+				default: 150 //二维码大小
+			},
+			margin: {
+				type: Number,
+				default: 0 //二维码边距
+			},
+			level: {
+				type: String,
+				default: 'L' //二维码质量L/M/Q/H
+			},
+			bColor: {
+				type: String,
+				default: '#ffffff' //二维码背景颜色
+			},
+			fColor: {
+				type: String,
+				default: '#000000' //二维码颜色
+			},
+			fileType: {
+				type: String,
+				default: 'png' //二维码图片类型
+			}
+		},
+		data() {
+			return {
+				qrShow: false,
+				qrShowStyle: {
+					"width": "150px",
+					"height": "150px",
+				}
+			}
+		},
+		watch: {
+			text(newVal, oldVal) {
+				this.onQrFun()
+			}
+		},
+		mounted() {
+			this.onQrFun()
+		},
+		methods: {
+			onQrFun() {
+				this.qrShow = this.text != ''
+				if(this.qrShow){
+					this.qrShowStyle.width = this.size+"px"
+					this.qrShowStyle.height = this.size+"px"
+					let level;
+					switch (this.level) {
+						case "M":
+						case "m":
+							level = uQRCode.errorCorrectLevel.M
+							break;
+						case "Q":
+						case "q":
+							level = uQRCode.errorCorrectLevel.Q
+							break;
+						case "H":
+						case "h":
+							level = uQRCode.errorCorrectLevel.H
+							break;
+						default:
+							level = uQRCode.errorCorrectLevel.L
+							break;
+					}
+					uQRCode.make({
+						canvasId: this.canvasId,
+						componentInstance: this,
+						text: this.text,
+						size: this.size,
+						margin: this.margin,
+						backgroundColor: this.bColor,
+						foregroundColor: this.fColor,
+						fileType: this.fileType,
+						errorCorrectLevel: level,
+						success: res => {}
+					})
+					
+					setTimeout(() => {
+						uni.canvasToTempFilePath({
+							canvasId: this.canvasId,
+							success: (res) => {
+								// 在H5平台下，tempFilePath 为 base64
+								this.$emit("update:filePath", res.tempFilePath);
+							}
+						}, this);			
+					}, 600)
+				}
+				
+			}
+		}
+	}
+</script>
+
+<style>
+</style>