baiyuApp/pages_live/components/liveTopInfoBar.vue

<template>
	<view
		:class="rootClass"
		:style="barStyle">
		<view :class="userInfoSectionClass">
			<template v-if="!scene">
				<image
					v-if="showType === 2"
					:class="backIconClass"
					src="https://bjzmky-1323137866.cos.ap-chongqing.myqcloud.com/userapp/images/return3.png"
					@click="onBack" />
				<image
					v-if="showType === 1"
					:class="backIconClassHorizontal"
					src="/static/images/live/back.png"
					@click="onBack" />
			</template>
			<view :class="avatarContainerClass">
				<u-avatar
					v-if="variant === 'outside'"
					:src="avatarUrl"
					:size="32" />
				<view
					v-else
					class="cover-avatar-round cover-avatar-round--host">
					<image
						class="cover-avatar-round__img"
						:src="avatarUrl" />
				</view>
				<view :class="userNameClass">{{ displayName }}</view>
			</view>
		</view>
		<view
			v-if="Array.isArray(viewers)"
			:class="viewersSectionClass">
			<view :class="viewersInnerClass">
				<view
					v-for="(item, index) in (viewers || [])"
					v-if="item"
					:key="viewerKeyPrefix + index"
					:class="viewerAvatarClass"
					:style="variant === 'overlay' ? viewerAvatarClipStyle : null">
					<image
						:class="viewerImgClass"
						:src="item" />
				</view>
				<view :class="viewerCountClass">{{ watchCount || 0 }}</view>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		name: 'LiveTopInfoBar',
		props: {
			variant: {
				type: String,
				default: 'overlay'
			},
			showType: {
				type: Number,
				default: 2
			},
			liveName: {
				type: String,
				default: ''
			},
			avatarUrl: {
				type: String,
				default: ''
			},
			viewers: {
				type: Array,
				default: () => []
			},
			watchCount: {
				type: [String, Number],
				default: 0
			},
			scene: {
				type: Boolean,
				default: false
			},
			paddingTop: {
				type: String,
				default: ''
			},
			viewerKeyPrefix: {
				type: String,
				default: 'ltib-'
			}
		},
		computed: {
			displayName() {
				const name = this.liveName || '未命名';
				return this.truncateString(name, 8);
			},
			themeClass() {
				return this.showType === 1 ?
					'cover-top-info-bar--light' :
					'cover-top-info-bar--dark';
			},
			rootClass() {
				if (this.variant === 'outside') {
					return ['top-info-bar-inner'];
				}
				return ['cover-top-info-bar', this.themeClass];
			},
			barStyle() {
				if (this.variant !== 'overlay') return {};
				const top = this.paddingTop || '0px';
				return {
					paddingTop: top,
					paddingLeft: '24rpx',
					paddingRight: '24rpx',
					boxSizing: 'border-box'
				};
			},
			userInfoSectionClass() {
				return this.variant === 'outside' ?
					'user-info-section' :
					'cover-user-info-section';
			},
			backIconClass() {
				return this.variant === 'outside' ?
					'back-icon mr4' :
					'cover-back-icon';
			},
			backIconClassHorizontal() {
				return this.variant === 'outside' ?
					'w48 h48 mr4' :
					'cover-back-icon-sm';
			},
			avatarContainerClass() {
				return this.variant === 'outside' ?
					'user-avatar-container' :
					'cover-user-avatar-container';
			},
			userNameClass() {
				return this.variant === 'outside' ?
					'user-name ml10 mr6' :
					'cover-user-name';
			},
			viewersSectionClass() {
				return this.variant === 'outside' ?
					'viewers-section' :
					'cover-viewers-section';
			},
			viewersInnerClass() {
				return this.variant === 'outside' ?
					'viewers-inner' :
					'cover-viewers-inner';
			},
			viewerAvatarClass() {
				if (this.variant === 'outside') {
					return 'viewer-avatar mr4';
				}
				return 'cover-avatar-round cover-avatar-round--sm';
			},
			viewerImgClass() {
				return this.variant === 'outside' ?
					'' :
					'cover-avatar-round__img';
			},
			viewerCountClass() {
				return this.variant === 'outside' ?
					'viewer-count' :
					'cover-viewer-count';
			},
			viewerAvatarClipStyle() {
				return {
					width: '52rpx',
					height: '52rpx',
					borderRadius: '26rpx',
					overflow: 'hidden',
					marginRight: '8rpx'
				};
			}
		},
		methods: {
			onBack() {
				this.$emit('back');
			},
			truncateString(str, maxLength) {
				if (typeof str !== 'string' || str.length <= maxLength) {
					return str;
				}
				return str.slice(0, maxLength) + '...';
			}
		}
	};
</script>

<style scoped lang="scss">
	/* 叠加在视频上 */
	.cover-top-info-bar {
		position: absolute;
		top: 0;
		left: 0;
		width: 100%;
		display: flex;
		flex-direction: row;
		justify-content: space-between;
		align-items: center;
		z-index: 99999;
		box-sizing: border-box;
	}

	.cover-top-info-bar--dark .cover-user-avatar-container,
	.cover-top-info-bar--dark .cover-viewer-count {
		background-color: rgba(0, 0, 0, 0.3);
	}

	.cover-top-info-bar--dark .cover-user-name {
		color: #ffffff;
	}

	.cover-top-info-bar--light .cover-user-avatar-container,
	.cover-top-info-bar--light .cover-viewer-count {
		background-color: #ffffff;
	}

	.cover-top-info-bar--light .cover-user-name {
		color: #333333;
	}

	.cover-user-info-section {
		display: flex;
		flex-direction: row;
		align-items: center;
	}

	.cover-back-icon {
		width: 60rpx;
		height: 64rpx;
		margin-right: 8rpx;
	}

	.cover-back-icon-sm {
		width: 42rpx;
		height: 42rpx;
		margin-right: 8rpx;
	}

	.cover-user-avatar-container {
		display: flex;
		flex-direction: row;
		align-items: center;
		padding: 6rpx 16rpx 6rpx 6rpx;
		border-radius: 32rpx;
	}

	.cover-avatar-round {
		overflow: hidden;
		margin-right: 10rpx;
	}

	.cover-avatar-round--host {
		width: 32px;
		height: 32px;
		border-radius: 50px;
	}

	.cover-avatar-round--sm {
		width: 52rpx;
		height: 52rpx;
		margin-right: 8rpx;
	}

	.cover-avatar-round__img {
		width: 100%;
		height: 100%;
		display: block;
	}

	.cover-user-name {
		font-size: 28rpx;
		line-height: 64rpx;
		max-width: 240rpx;
		overflow: hidden;
		white-space: nowrap;
	}

	.cover-viewers-section {
		display: flex;
		flex-direction: row;
		align-items: center;
	}

	.cover-viewers-inner {
		display: flex;
		flex-direction: row;
		align-items: center;
	}

	.cover-viewer-count {
		min-width: 80rpx;
		height: 52rpx;
		border-radius: 26rpx;
		font-size: 30rpx;
		text-align: center;
		line-height: 52rpx;
		padding: 0 8rpx;
	}

	/* 视频区外（横屏或降级） */
	.top-info-bar-inner {
		width: 100%;
		display: flex;
		justify-content: space-between;
		flex-direction: row;
		align-items: center;
	}

	.user-info-section {
		display: flex;
		align-items: center;

		.back-icon {
			width: 60rpx;
			height: 64rpx;
		}

		.user-avatar-container {
			padding: 6rpx 8rpx;
			height: 64rpx;
			background: var(--normal-bg);
			border-radius: 32rpx;
			display: flex;
			align-items: center;

			.user-name {
				color: var(--text-color);
			}
		}
	}

	.viewers-section {
		display: flex;
		justify-content: flex-end;
		align-items: center;
	}

	.viewers-inner {
		display: flex;
		align-items: center;
	}

	.viewer-avatar {
		width: 52rpx;
		height: 52rpx;
		border-radius: 26rpx;
		overflow: hidden;
		image{
			width: 100%;
			height: 100%;
		}
	}

	.viewer-count {
		width: 80rpx;
		height: 52rpx;
		background: var(--normal-bg);
		border-radius: 26rpx;
		font-size: 30rpx;
		color: var(--text-color);
		text-align: center;
		line-height: 52rpx;
	}
</style>