276 lines
7.2 KiB
Vue
276 lines
7.2 KiB
Vue
<template>
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<!-- 九宫格容器 -->
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<view class="lottery-grid">
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<!-- 高亮选中框 -->
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<view class="highlight-box" :style="{
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top: highlightTop,
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left: highlightLeft,
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transition: isRotating ? 'all 0.07s linear' : 'none'
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}"></view>
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<!-- 9个格子 -->
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<view class="grid-item" v-for="(item, index) in 9" :key="index">
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<!-- 中间格子作为抽奖按钮 (索引4) -->
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<template v-if="index === 4">
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<view class="lottery-btn" @click="handleStartClick">
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<text>{{ isRotating ? '抽奖中...' : '开始抽奖' }}</text>
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</view>
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</template>
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<!-- 其他8个奖品格子 -->
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<template v-else>
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<image :src="prizes[index].img" class="prize-img" mode="widthFix"></image>
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<text class="prize-name">{{ prizes[index].name }}</text>
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</template>
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</view>
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</view>
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</template>
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<script>
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export default {
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props: {
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// 奖品数据数组
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prizes: {
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type: Array,
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required: true,
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default: () => []
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},
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// 是否禁用抽奖
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isDisabled: {
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type: Boolean,
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default: false
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}
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},
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data() {
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return {
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isRotating: false, // 是否正在旋转
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highlightTop: '0rpx', // 高亮框顶部位置
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highlightLeft: '0rpx', // 高亮框左侧位置
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// 抽奖配置常量
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LOTTERY_PATH: [0, 1, 2, 5, 8, 7, 6, 3], // 抽奖路径顺序（顺时针）
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INITIAL_SPEED: 100, // 初始速度(ms) - 调慢以便观察
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MAX_STEPS: 50, // 最大步数，防止无限循环
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ACCELERATE_STEPS: 5, // 加速步数
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SPEED_DECREMENT: 10, // 加速时的速度减少量
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SPEED_INCREMENT: 15, // 减速时的速度增加量
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MIN_SPEED: 50, // 最小速度
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STOP_SPEED: 250, // 停止时的速度阈值
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animationTimer: null // 动画计时器
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}
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},
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methods: {
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/**
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* 移动高亮框到指定索引位置
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* @param {number} index - 格子索引
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*/
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moveHighlight(index) {
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const row = Math.floor(index / 3) // 计算行
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const col = index % 3 // 计算列
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this.highlightTop = `${row * 200}rpx`
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this.highlightLeft = `${col * 200}rpx`
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},
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/**
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* 执行抽奖动画
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* @param {Object} options - 动画参数
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*/
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runAnimation(options) {
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const { currentStep, speed, targetStep, cycleCount, totalSteps } = options
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// 清除之前的计时器
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if (this.animationTimer) {
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clearTimeout(this.animationTimer)
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}
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// 计算下一步
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const nextStep = (currentStep + 1) % this.LOTTERY_PATH.length
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const nextTotalSteps = totalSteps + 1
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let nextCycleCount = cycleCount
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let nextSpeed = speed
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// 计算循环次数
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if (nextStep === 0) {
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nextCycleCount++
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}
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// 速度控制逻辑
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if (nextCycleCount < 1 && nextTotalSteps < this.ACCELERATE_STEPS) {
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// 加速阶段
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nextSpeed = Math.max(this.MIN_SPEED, nextSpeed - this.SPEED_DECREMENT)
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} else {
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// 减速阶段
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nextSpeed += this.SPEED_INCREMENT
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}
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// 移动高亮框到当前步骤位置
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this.moveHighlight(this.LOTTERY_PATH[nextStep])
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// 检查是否应该停止
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const shouldStop =
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(nextSpeed > this.STOP_SPEED && nextStep === targetStep) || nextTotalSteps > this.MAX_STEPS
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if (shouldStop) {
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// 动画结束
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this.isRotating = false
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this.animationTimer = null
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// 触发抽奖完成事件，返回中奖奖品
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this.$emit('complete', this.prizes[this.LOTTERY_PATH[nextStep]])
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return
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}
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// 继续下一帧动画
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this.animationTimer = setTimeout(() => {
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this.runAnimation({
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currentStep: nextStep,
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speed: nextSpeed,
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targetStep,
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cycleCount: nextCycleCount,
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totalSteps: nextTotalSteps
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})
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}, nextSpeed)
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},
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/**
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* 随机生成目标位置（带权重）
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* @returns {number} 目标位置索引
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*/
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getRandomTarget() {
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// 奖品权重配置，数值越高概率越大
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const weights = [2, 2, 1, 0.5, 2, 1, 3, 2]
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const total = weights.reduce((sum, w) => sum + w, 0) // 计算总权重
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let random = Math.random() * total // 生成随机数
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// 根据权重计算目标位置
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for (let i = 0; i < weights.length; i++) {
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random -= weights[i]
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if (random <= 0) return i
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}
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// 兜底：随机返回一个位置
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return Math.floor(Math.random() * this.LOTTERY_PATH.length)
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},
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/**
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* 处理开始抽奖点击事件
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*/
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handleStartClick() {
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// 如果正在抽奖或被禁用，则不执行
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if (this.isDisabled || this.isRotating) {
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console.log('抽奖被禁用或正在进行中')
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return
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}
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// 通知父组件开始抽奖
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this.$emit('start')
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// 开始抽奖动画（无论父组件做了什么处理）
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this.startLotteryAnimation()
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},
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/**
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* 开始抽奖动画
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*/
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startLotteryAnimation() {
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// 重置动画参数
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clearTimeout(this.animationTimer)
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// 标记为正在抽奖
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this.isRotating = true
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// 开始动画
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this.runAnimation({
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currentStep: 0,
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speed: this.INITIAL_SPEED,
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targetStep: this.getRandomTarget(),
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cycleCount: 0,
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totalSteps: 0
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})
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}
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},
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beforeDestroy() {
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// 组件销毁时清理计时器
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if (this.animationTimer) {
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clearTimeout(this.animationTimer)
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this.animationTimer = null
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}
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}
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}
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</script>
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<style scoped>
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.lottery-grid {
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width: 600rpx;
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height: 600rpx;
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display: flex;
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flex-wrap: wrap;
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position: relative;
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border: 8rpx solid #ffc107;
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border-radius: 16rpx;
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background-color: #fff;
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box-sizing: content-box;
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margin: 0 auto;
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}
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.grid-item {
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width: 200rpx;
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height: 200rpx;
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box-sizing: border-box;
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border: 2rpx solid #ffeeba;
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display: flex;
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flex-direction: column;
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justify-content: center;
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align-items: center;
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position: relative;
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flex-shrink: 0;
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}
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.lottery-btn {
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width: 180rpx;
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height: 180rpx;
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background: linear-gradient(135deg, #ff5252 0%, #e63946 100%);
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border-radius: 50%;
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display: flex;
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justify-content: center;
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align-items: center;
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box-shadow: 0 6rpx 12rpx rgba(230, 57, 70, 0.3);
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/* 增加点击反馈 */
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transition: transform 0.2s;
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}
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.lottery-btn:active {
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transform: scale(0.95);
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}
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.lottery-btn text {
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color: #fff;
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font-size: 32rpx;
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font-weight: bold;
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text-align: center;
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padding: 0 10rpx;
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}
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.prize-img {
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width: 100rpx;
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height: 100rpx;
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margin-bottom: 10rpx;
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}
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.prize-name {
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font-size: 26rpx;
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color: #333;
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text-align: center;
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padding: 0 10rpx;
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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}
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.highlight-box {
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position: absolute;
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width: 200rpx;
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height: 200rpx;
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box-sizing: border-box;
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border: 6rpx solid #ff4081;
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background-color: rgba(255, 64, 129, 0.1);
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z-index: 1;
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pointer-events: none;
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/* 增加高亮动画效果 */
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box-shadow: 0 0 15rpx 2rpx rgba(255, 64, 129, 0.5);
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}
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</style> |