heshanApp/pages_im/pages/conversation/chating/components/MessageItem/FaceMessageRender.vue

<template>
	<view class="media_message_container" @click="clickMediaItem">
		<u--image :showLoading="true" width="200" :height="maxHeight" mode="widthFix" :src="getImgUrl" @click="clickMediaItem">
			<template v-slot:loading>
				<u-loading-icon color="red"></u-loading-icon>
			</template>
		</u--image>
	</view>
</template>

<script>
export default {
	name: 'FaceMessageRender',
	props: {
		message: Object
	},
	data() {
		return {
			faceElem: {}
		};
	},
	mounted() {
		this.faceElem = JSON.parse(this.message.faceElem.data);
	},
	computed: {
		getImgUrl() {
			return this.faceElem.url;
		},
		maxHeight() {
			const aspectRatio = this.faceElem.height / this.faceElem.width;
			return 200 * aspectRatio;
		}
	},
	methods: {
		clickMediaItem() {
			const list = [this.faceElem.url];
			const idx = 0;
			uni.previewImage({
				current: 0,
				urls: [this.faceElem.url],
				longPressActions: {
					itemList: ['保存图片'],
					success(data) {
						uni.downloadFile({
							url: list[idx],
							success(res) {
								console.log(res);
								let url = res.tempFilePath;
								uni.saveImageToPhotosAlbum({
									filePath: url,
									success() {
										uni.showToast({
											title: '已保存到系统相册',
											icon: 'none'
										});
									},
									fail(err) {
										uni.showToast({
											title: '保存失败',
											icon: 'none'
										});
									}
								});
							}
						});
					}
				},
				fail(err) {
					// console.log(err);
				}
			});
		}
	}
};
</script>

<style lang="scss" scoped>
.media_message_container {
	position: relative;
	border-radius: 16rpx;
	overflow: hidden;
}
</style>