uni-halo/components/cache-image/cache-image.vue

<template>
	<view class="">
		<view v-if="loadStatus == 'loading'" class="img-loading" :style="[imgStyle, loadStyle]">
			<!-- <text class="img-load-icon iconfont icon-loading"></text>
			<text class="img-load-text">{{ loadText }}</text> -->
			<image :src="loadingImgSrc" :style="[imgStyle]" mode="aspectFit"></image>
		</view>
		<view v-if="loadStatus == 'error'" class="img-error" :style="[imgStyle, loadErrStyle]">
			<text class="img-err-icon iconfont icon-exclamation-circle"></text>
			<text class="img-load-text">{{ loadErrText }}</text>
		</view>
		<image
			v-show="loadStatus == 'success'"
			:src="src"
			@load="fnOnLoad"
			@error="fnOnError"
			:lazy-load="lazyLoad"
			:style="[imgStyle]"
			:mode="mode"
			@click="$emit('on-click', url)"
		></image>
	</view>
</template>

<script>
import imageCache from '@/utils/imageCache.js';
export default {
	name: 'cache-image',
	props: {
		url: {
			type: String,
			default: ''
		},
		lazyLoad: {
			type: Boolean,
			default: true
		},
		loadStyle: {
			type: Object,
			default() {
				return {
					backgroundColor: '#ffffff',
					color: '#333'
				};
			}
		},
		loadErrStyle: {
			type: Object,
			default() {
				return {
					color: 'rgba(244, 67, 54,1)'
					// backgroundColor: 'rgba(244, 67, 54,0.2)'
				};
			}
		},
		mode: {
			type: String,
			default: 'aspectFill'
		},
		loadText: {
			type: String,
			default: '加载中...'
		},
		loadErrText: {
			type: String,
			default: '加载失败'
		},
		fileMd5: {
			type: String,
			default: ''
		},
		styles: {
			type: Object,
			default() {
				return {};
			}
		},
		width: {
			type: String,
			default: '100%'
		},
		height: {
			type: String,
			default: '100%'
		},
		radius: {
			type: String,
			default: ''
		}
	},
	data() {
		return {
			imgStyle: {},
			src: '', // 图片地址
			loadStatus: 'loading'
		};
	},
	computed: {
		loadingImgSrc() {
			return getApp().globalData.loadingGifUrl;
		}
	},
	watch: {
		// 监听图片md5值的变化
		fileMd5(val) {
			// 查找获取图片缓存
			this.fnGetImageCache();
		}
	},
	created() {
		this.imgStyle = {
			width: this.width,
			height: this.height,
			borderRadius: this.radius,
			...this.styles
		};

		// 查找获取图片缓存
		this.fnGetImageCache();
	},
	methods: {
		// 查找获取图片缓存
		async fnGetImageCache() {
			// #ifdef APP-PLUS
			var result = await imageCache.getImageCache(this.url, this.fileMd5);
			if (result) {
				this.src = result;
			} else {
				this.src = this.url;
			}
			// #endif
			// #ifndef APP-PLUS
			this.src = this.url;
			// #endif
		},
		fnOnLoad() {
			this.loadStatus = 'success';
		},
		fnOnError() {
			this.loadStatus = 'error';
		}
	}
};
</script>

<style scoped lang="scss">
.img-loading,
.img-error {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	box-sizing: border-box;
	background-color: #f2f2f2;
}
.img-load-icon {
	font-size: 36rpx;
	animation: xhRote 0.8s infinite linear;
}
.img-load-text {
	font-size: 28rpx;
	margin-top: 8rpx;
	color: inherit;
}
.img-error {
	font-size: 28rpx;
}
.img-err-icon {
	font-size: 36rpx;
}
@keyframes xhRote {
	0% {
		transform: rotate(0deg);
	}

	100% {
		transform: rotate(360deg);
	}
}
</style>