uniapp小程序实现海报下载图片到手机本地_uniapp的下载图片

 图片效果

<template>
	<u-popup :show="show" closeable @close="handleClose" zIndex="999999">
		<view class="shareModel">
			<view class="title">分享店铺</view>
			<!-- 分享模态框 -->
			<view class="share-container" @click.stop>
				<view class="merchant-info">
					<view class="merchantName">{{ storeInfo.merchantName }}</view>
					<view class="store-img">
						<image class="img" :src="storeInfo.merchantIconStaticPath" mode="aspectFill" />
					</view>
					<view class="tip">（微信扫描二维码即可进入）</view>
				</view>
				<view class="user-info">
					<view class="header-name">
						<u-avatar size="60" :src="$userInfo.portraitFile && $userInfo.portraitFile.staticPath" />
						<text>{{ $userInfo.userName }}</text>
					</view>
					<u--image :showLoading="true" :src="goodsIcon" width="100rpx" height="100rpx" />
				</view>
			</view>
			<view class="share-bot" @click.stop>
				<view class="share-btns">
					<view class="btns-list" @click="onSaveImg">
						<u--image :showLoading="true" :src="copyLink" width="72rpx" height="72rpx" />
						<text>复制链接</text>
					</view>
					<view class="btns-list" @click="onSaveImg">
						<u--image :showLoading="true" :src="saveIcon" width="72rpx" height="72rpx" />
						<text>保存海报</text>
					</view>
				</view>
			</view>
		</view>
	</u-popup>
</template>
 
<script>
	import {
		mapState
	} from 'vuex'
	export default {
		components: {},
		mixins: [],
		props: {
			show: {
				type: Boolean,
				default: false
			},
			imgUrl: {
				type: String,
				default: ''
			},
			storeInfo: {
				type: Object,
				default: () => {}
			}
		},
		data() {
			return {
				saveIcon: require('../../static/download.png'),
				copyLink: require('../../static/copyLink.png'),
				goodsIcon: require('../../static/goodsIcon.png'),
				settingWritePhotosAlbum: false
			}
		},
		watch: {},
		computed: {
			...mapState(['$userInfo'])
		},
		created() {},
		methods: {
			handleClose() {
				this.$emit("update:show", false)
				this.$emit('close')
			},
			saveImageToPhotosAlbumFun() {
				const that = this;
				uni.downloadFile({
					url: that.storeInfo.merchantIconStaticPath, //图片的地址
					success: function(res) {
						const tempFilePath = res.tempFilePath //通过res中的tempFilePath 得到需要下载的图片地址
						uni.saveImageToPhotosAlbum({
							filePath: tempFilePath,
							success: () => {
								uni.hideLoading();
								uni.showToast({
									title: '保存成功'
								});
							},
							fail: () => {
								uni.showToast({
									title: '保存失败',
									icon: 'error'
								});
							},
							complete: res => {
								uni.hideLoading();
							}
						});
					}
				})
			},
			// 保存图片
			async onSaveImg() {
				const that = this;
				// #ifdef MP-WEIXIN
				uni.showLoading({
					title: '二维码下载中'
				});
				uni.getSetting({
					success: res => {
						if (res.authSetting['scope.writePhotosAlbum']) {
							that.saveImageToPhotosAlbumFun()
						} else {
							uni.authorize({
								scope: 'scope.writePhotosAlbum',
								success: () => {
									that.saveImageToPhotosAlbumFun()
								},
								fail: () => {
									uni.showModal({
										title: '提示',
										content: '请先在设置页面打开“保存相册”使用权限',
										confirmText: '去设置',
										cancelText: '算了',
										success: data => {
											if (data.confirm) {
												uni.openSetting();
											}
											uni.hideLoading();
										}
									});
								},
								complete: res => {
									uni.hideLoading();
								}
							});
						}
					}
				});
				// #endif
			}
		}
	}
</script>
 
<style lang="scss">
	.shareModel {
		width: 100%;
		background-color: #F5F5F5;
		color: #2D2D2D;
 
		.title {
			padding: 32rpx;
			text-align: center;
			font-size: 32rpx;
			font-weight: bold;
		}
 
		.share-container {
			margin: 0 80rpx 24rpx;
			padding: 32rpx;
			height: 100%;
			background: rgba(255, 255, 255, 0.39);
			box-shadow: 0 6rpx 20rpx rgba(110, 108, 108, 0.1);
			border-radius: 24rpx;
 
			.merchant-info {
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
 
				.merchantName {
					margin-bottom: 48rpx;
					font-weight: bold;
					font-size: 32rpx;
				}
 
				.tip {
					padding: 24rpx 0 48rpx;
					color: #999999;
					font-size: 24rpx;
				}
 
				.store-img {
					padding: 20rpx;
					background-color: #F5F5F5;
 
					.img {
						width: 380rpx;
						height: 380rpx;
					}
				}
			}
 
			.user-info {
				display: flex;
				align-items: center;
				justify-content: space-between;
 
				.header-name {
					display: flex;
					align-items: center;
 
					text {
						margin-left: 12rpx;
					}
				}
			}
		}
 
		.share-bot {
			width: 100%;
			background: #FFFFFF;
 
			.share-btns {
				display: flex;
				justify-content: space-around;
				align-items: center;
				width: 100%;
				padding: 30rpx 0;
 
				.btns-list {
					display: flex;
					flex-direction: column;
					justify-content: center;
					align-items: center;
 
					text {
						color: #2D2D2D;
						font-size: 28rpx;
						margin-top: 8rpx;
					}
				}
			}
		}
	}
</style>