baiyuApp/pages_live/components/like.vue

<template>
	<view class="like-container">
		<image class="image" @click="handleLike" src="/static/images/live/zan1.png" ref="likeBtn"></image>
		<view v-for="(icon, index) in icons" :key="icon.id" class="animated-icon" :style="{
        top: icon.top + 'px',
        left: icon.left + 'px',
        fontSize: icon.size + 'px',
        color: icon.color,
        opacity: icon.opacity,
        transform: 'translate(-50%, calc(-50% + ' + icon.y + 'px)) rotate(' + icon.rotate + 'deg)',
        transition: 'all ' + icon.duration + 'ms ' + icon.delay + 'ms ease-out'
      }">
			{{ icon.symbol }}
		</view>
	</view>
</template>

<script>
	export default {
		name: 'DouyinLike',
		props: {
			// 初始点赞数
			initialCount: {
				type: Number,
				default: 0
			},
			// 单次点击生成的图标数量
			iconAmount: {
				type: Number,
				default: 6
			},
			// 图标颜色集合
			iconColors: {
				type: Array,
				default: () => [
					'#ff798b', '#ffc54f', '#ffaefb',
					'#87f37f', '#6eb9ff', '#6d86d6',
					'#bb7df5', '#eeffc5'
				]
			},
			// 图标大小范围
			sizeRange: {
				type: Array,
				default: () => [40, 78]
			},
			// 动画持续时间范围(ms)
			durationRange: {
				type: Array,
				default: () => [700, 1300]
			},
			// 上升距离范围(px)
			riseRange: {
				type: Array,
				default: () => [200, 420]
			},
			// 左右飘动范围(px)
			floatRange: {
				type: Array,
				default: () => [-50, 50]
			}
		},
		data() {
			return {
				// 当前点赞数
				count: this.initialCount,
				// 是否已点赞
				isLiked: false,
				// 动画图标数组
				icons: [],
				// 可使用的图标集合
				iconSymbols: ['❤', '★', '🎁', '🔥', '👍', '✨', '💖', '🌟'],
				// 用于生成唯一ID
				iconId: 0
			};
		},
		methods: {
			/**
			 * 处理点击事件
			 */
			handleLike() {
				// 更新点赞状态
				this.isLiked = !this.isLiked;
				this.count += this.isLiked ? 1 : -1;
				this.$emit('change', {
					isLiked: this.isLiked,
					count: this.count
				});

				// 生成图标动画
				this.createIcons();
			},

			/**
			 * 创建多个图标动画（以点赞按钮中心为起点，避免真机触摸坐标偏差）
			 */
			createIcons() {
				const query = uni.createSelectorQuery().in(this);
				query.select('.like-container').boundingClientRect();
				query.select('.image').boundingClientRect();
				query.exec((res) => {
					const containerRect = res[0];
					const imageRect = res[1];
					if (!containerRect || !imageRect) return;

					const x = imageRect.left - containerRect.left + imageRect.width / 2;
					const y = imageRect.top - containerRect.top + imageRect.height / 2;

					for (let i = 0; i < this.iconAmount; i++) {
						this.createIcon(x, y, i * 40);
					}
				});
			},

			/**
			 * 创建单个图标动画
			 * @param {Number} x 初始X坐标
			 * @param {Number} y 初始Y坐标
			 * @param {Number} delay 延迟时间(ms)
			 */
			createIcon(x, y, delay) {
				// 随机属性（sizeRange 为 rpx，转为 px 与定位单位一致）
				const pxRatio = uni.getSystemInfoSync().windowWidth / 750;
				const size = this.getRandom(...this.sizeRange) * pxRatio;
				const color = this.iconColors[Math.floor(Math.random() * this.iconColors.length)];
				const duration = this.getRandom(...this.durationRange);
				const riseDistance = -this.getRandom(...this.riseRange);
				const floatOffset = this.getRandom(...this.floatRange);
				const rotate = this.getRandom(-30, 30);
				// 随机选择一个图标
				const symbol = this.iconSymbols[Math.floor(Math.random() * this.iconSymbols.length)];

				// 生成唯一ID
				const iconId = this.iconId++;

				// 创建图标对象
				const icon = {
					id: iconId,
					left: x,
					top: y,
					size,
					color,
					opacity: 1,
					y: 0,
					rotate,
					duration,
					delay,
					symbol
				};

				// 添加到数组
				this.icons.push(icon);

				// 触发动画
				setTimeout(() => {
					// 使用Vue的$set方法确保响应式更新
					this.$set(this.icons, this.icons.findIndex(item => item.id === iconId), {
						...this.icons.find(item => item.id === iconId),
						y: riseDistance,
						left: x + floatOffset,
						opacity: 0
					});
				}, delay);

				// 动画结束后移除
				setTimeout(() => {
					const index = this.icons.findIndex(item => item.id === iconId);
					if (index !== -1) {
						this.icons.splice(index, 1);
					}
				}, duration + delay);
			},

			/**
			 * 生成范围内的随机数
			 */
			getRandom(min, max) {
				return min + Math.random() * (max - min);
			}
		}
	};
</script>

<style scoped lang="scss">

	.like-icon {
		font-size: 28rpx;
		color: #999;
		transition: all 0.3s ease;
	}

	/* 动画容器 */
	.like-container {
		position: relative;
		
		.image {
			width: 80rpx;
			height: 80rpx;
		}

		/* 动画图标样式 */
		.animated-icon {
			position: absolute;
			will-change: transform, opacity, left;
			text-shadow: 0 1rpx 2rpx rgba(0, 0, 0, 0.2);
			z-index: 10;
			animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
		}

		/* 点赞按钮动画 */
		@keyframes pulse {
			0% {
				transform: scale(1);
			}

			50% {
				transform: scale(1.4);
			}

			100% {
				transform: scale(1);
			}
		}
	}
</style>