web-app-v1/pages/honour/honour.vue

<template>
	<view class="honour" :class="fromIndex ? '' : 'share'">
		<!-- <custom-nav :title="pageTitle" v-if="fromIndex"></custom-nav> -->
		<custom-toast ref="toast"></custom-toast>
		<view class="container">
			<view class="certificate" @tap="previewImage">
				<canvas style="position: absolute;top: 10%;left: 8%" id="canvas" canvas-id="canvas"
					:style="{ width: canvasWidth + 'px', height: canvasHeight + 'px' }"></canvas>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		onShareAppMessage: function(res) {
			//分享荣誉证书
			uni.showLoading({
				title: '加载中',
				mask: true
			}); //显示loading
			if (res.from === 'button') {
				//如果点击分享给好友按钮，则分享页面为当前页面
				return {
					title: '我的学位证书',
					path: `/pages/honour/honour?name=${this.name}&season=${this.season}&grade=${this.grade}&year=${this.year}&month=${this.month}&day=${
					this.day
				}&header=${encodeURIComponent(this.header)}`
				};
			}
			return {
				//如果点击右上角分享按钮，则分享页面为小程序主页
				title: '大卫博士商学院卖货争霸',
				path: '/pages/zbsIndex/index'
			};
		},
		data() {
			return {
				pageTitle: '荣耀殿堂', //页面名
				canvasWidth: 0, //canvas 宽
				canvasHeight: 0, //canvas 高
				name: '', //名字
				season: '',
				grade: '', //学位
				year: '', //年
				month: '', //月
				day: '', //日
				fromIndex: true, //是否非分享页面,
				header: '',
				headerImg: '',
				deg: ''
			};
		},
		computed: {
			userServerInfo() {
				return uni.getStorageSync('newUserInfo');
			},
		},
		methods: {
			saveImg() {
				//保存证书到本地
				uni.canvasToTempFilePath({
						//首先将 canvas 转化为一个图片
						canvasId: 'canvas'
					})
					.then(([, res]) => {
						//获得图片的临时路径
						return uni.saveImageToPhotosAlbum({
							//将图片保存到系统相册
							filePath: res.tempFilePath
						});
					})
					.then(([err, res]) => {
						console.log(err, res);
						if (err && (err.errMsg === 'saveImageToPhotosAlbum:fail:auth denied' || err.errMsg ===
								'saveImageToPhotosAlbum:fail auth deny')) {
							//如果用户拒绝授权保存图片到相册
							const that = this;
							uni.showModal({
								title: '"大卫博士学位争霸赛"需要保存图片或视频到你的相册',
								content: '',
								success(res) {
									if (res.confirm) {
										wx.openSetting({
											success(res) {
												that.saveImg();
												return;
											}
										});
									}
								}
							});
						} else if (err && err.errMsg === 'saveImageToPhotosAlbum:fail authorize no response') {
							uni.showModal({
								content: '保存图片失败,请手动截图保存',
								showCancel: false
							});
						}
						if (res && res.errMsg === 'saveImageToPhotosAlbum:ok') {
							uni.showModal({
								content: '图片已经保存成功',
								showCancel: false
							});
						}
					});
			},
			previewImage() {
				//点击 canvas 预览图片
				uni.showLoading({
					title: '加载中',
					mask: true
				}); //显示loading
				uni.canvasToTempFilePath({
					//首先将 canvas 转化为一个图片
					canvasId: 'canvas'
				}).then(([, res]) => {
					//获得图片的临时路径
					uni.hideLoading(); //app hide 时隐藏loading
					uni.previewImage({
						urls: [res.tempFilePath]
					});
				});
			},
			tohishonour() {
				//点击历史荣誉
				uni.navigateTo({
					url: '../hishonour/hishonour'
				});
			}
		},
		async onLoad(opt) {
			//当进入页面之后判断是否带带有参数
			const avatarUrl = this.userServerInfo.avatar
			opt.time = opt.time || this.userServerInfo.start_time;
			this.header = opt.name ? decodeURIComponent(opt.header) : avatarUrl;
			uni.showLoading({
				title: '加载中',
				mask: true
			});
			let _this = this;
			uni.downloadFile({
				url: this.header,
				success: ({
					statusCode,
					tempFilePath
				}) => {
					if (statusCode === 200) {
						this.headerImg = tempFilePath;
					}
				},
				fail: e => {
					console.log(e);
					uni.showToast({
						icon: 'none',
						title: '获取用户头像失败',
						duration: 3000
					});
				},
				complete: () => {
					uni.showLoading(); //停止 loading
					_this.canvasWidth = uni.upx2px(641);
					_this.canvasHeight = uni.upx2px(977);
					_this.fromIndex = opt.name ? false : true; //当前页面为分享页面
					_this.name = opt.name || _this.userServerInfo.nickname; //姓名
					_this.name = _this.name.slice(0, 6);
					_this.season = opt.season || _this.userServerInfo.season; // 赛季季数
					_this.grade = opt.grade || ''; //学位
					console.log(_this.grade);
					// _this.year = opt.year || filters.getYear(+opt.time) //年
					// _this.month = opt.month || filters.getMonth(+opt.time) //月
					// _this.day = opt.day || filters.getDate(+opt.time) //日
					const ctx = uni.createCanvasContext('canvas');
					ctx.drawImage(_this.grade === '大学毕业' ? '../../static/icon/zs2-min.jpg' :
						'../../static/icon/zs1-min.jpg', 0, 0, _this.canvasWidth, _this.canvasHeight);
					ctx.save();
					ctx.beginPath();
					ctx.arc(uni.upx2px(320), uni.upx2px(400), uni.upx2px(40), 0, 2 * Math.PI, false);
					ctx.clip();
					ctx.drawImage(_this.headerImg, uni.upx2px(280), uni.upx2px(360), uni.upx2px(80), uni
						.upx2px(80));
					ctx.restore();
					ctx.setTextAlign('center')
					ctx.setFontSize(uni.upx2px(26))
					ctx.fillText(_this.grade === '学霸' || _this.grade === '结业' ? '' : _this
						.grade, uni.upx2px(320), uni.upx2px(555))
					ctx.setFontSize(uni.upx2px(32))
					ctx.fillText(_this.name, uni.upx2px(315), uni.upx2px(495))
					ctx.setFontSize(uni.upx2px(28))
					ctx.fillText(_this.season, uni.upx2px(440), uni.upx2px(595))
					ctx.draw()
					_this.$hideLoading();
					uni.hideLoading()
				}
			});
		}
	};
</script>

<style scoped lang="scss">
	.container {
		padding: 36rpx 54rpx;

		.certificate {
			width: 642rpx;
			height: 998rpx;

			.bg {
				width: 100%;
				height: 100%;
			}
		}

		.share {
			padding: 22rpx 90rpx;
			display: flex;
			justify-content: center;
			align-items: center;

			.item {
				display: flex;
				justify-content: center;
				flex-direction: column;
				align-items: center;
				background: none;
				padding: 0;
				margin: 0;
				line-height: 70rpx !important;

				&::after,
				&::before {
					border: none;
				}

				.icon {
					width: 64rpx;
					height: 64rpx;
				}

				color: #333333;
				font-size: 28rpx;
			}
		}
	}

	.honour {
		@include page();

		&.share {
			border-top-color: #493225;
		}

		.content {
			display: flex;
			flex-direction: column;

			.top {
				width: 100%;
				height: 680rpx;
				background: #493225;
				border-bottom-right-radius: 375rpx 123rpx;
				border-bottom-left-radius: 375rpx 123rpx;
				position: relative;

				&.share {
					height: 890rpx;
				}

				#canvas {
					position: absolute;
					top: 100px;
					left: 50%;
					transform: translateX(-50%);

					&.share {
						top: 0;
					}
				}

				.bg {
					position: absolute;
					width: 566rpx;
					height: 464rpx;
					top: 100px;
					left: 50%;
					z-index: 1;
					transform: translateX(-50%);
				}

				.all {
					position: absolute;
					right: 32rpx;
					bottom: -13rpx;
					font-size: 26rpx;
					color: #fa6342;
				}
			}

			.bot {
				flex: 1;
				box-sizing: border-box;
				padding: 100rpx;

				.title {
					text-align: center;
					height: 45rpx;
					display: flex;
					justify-content: center;
					align-items: center;
					font-size: 36rpx;
					color: #fa6342;

					text {
						margin: 0 40rpx;
					}

					image {
						width: 48rpx;
						height: 45rpx;
					}
				}

				.text {
					margin-top: 80rpx;
					font-size: 30rpx;
					color: #666666;
				}

				.share-save {
					height: 60rpx;
					margin-top: 80rpx;
					display: flex;
					justify-content: space-between;

					.button {
						height: 100%;
						width: 240rpx;
						box-sizing: border-box;
						border: 2rpx solid #fa6342;
						border-radius: 30rpx;
						line-height: 56rpx;
						text-align: center;
						color: #fa6342;
						background: #ffffff;
						padding: 0;
						font-size: 24rpx;

						text {
							margin: 0 6rpx;
							vertical-align: middle;

							&.cuIcon {
								font-size: 36rpx;
							}
						}
					}
				}
			}
		}
	}
</style>