spring-festival-greetings/pages/avatar/index.vue

<template>
  <view class="avatar-page" :style="{ paddingTop: getBavBarHeight() + 'px' }">
    <view class="nav-bar">
      <view class="back" @tap="goBack">‹</view>
      <text class="nav-title-left">新春头像挂饰</text>
    </view>
    <view class="preview-card">
      <view class="preview-square">
        <image class="avatar-img" :src="currentAvatar" mode="aspectFill" />
        <image
          v-if="selectedFrame"
          class="frame-img"
          :src="selectedFrame"
          mode="aspectFill"
        />
        <image
          v-if="selectedDecor"
          class="decor-img"
          :src="selectedDecor"
          mode="aspectFit"
          :style="decorStyle"
          @touchstart.stop="onTouchStart"
          @touchmove.stop="onTouchMove"
          @touchend.stop="onTouchEnd"
        />
      </view>
      <view v-if="selectedDecor" class="interaction-tip">
        <text>👆 单指拖动</text>
        <text class="tip-divider">|</text>
        <text>✌️ 双指缩放/旋转</text>
      </view>
      <text v-else class="preview-tip">实时预览效果</text>
    </view>

    <view class="action-buttons">
      <button class="btn secondary" @tap="saveAndUse">保存</button>
      <button class="btn primary" open-type="share">分享给朋友</button>
    </view>

    <view class="section">
      <view class="section-header">
        <text class="section-title">选择底图</text>
      </view>
      <scroll-view scroll-x class="avatar-scroll" show-scrollbar="false">
        <view class="avatar-list">
          <view class="avatar-card upload-card" @tap="useWeChatAvatar">
            <view class="upload-icon">📷</view>
            <text class="upload-text">微信头像</text>
          </view>
          <view
            v-for="(item, i) in systemAvatars"
            :key="i"
            class="avatar-card"
            :class="{ active: currentAvatar === item }"
            @tap="currentAvatar = item"
          >
            <image :src="item" class="avatar-thumb" mode="aspectFill" />
            <view v-if="currentAvatar === item" class="check">✔</view>
          </view>
        </view>
      </scroll-view>
    </view>

    <view class="tabs">
      <view
        class="tab"
        :class="{ active: activeTab === 'frame' }"
        @tap="activeTab = 'frame'"
        >头像框</view
      >
      <view
        class="tab"
        :class="{ active: activeTab === 'decor' }"
        @tap="activeTab = 'decor'"
        >挂饰配件</view
      >
    </view>

    <view v-if="activeTab === 'frame'" class="grid">
      <view
        v-for="(frame, i) in frames"
        :key="i"
        class="grid-item"
        :class="{ active: selectedFrame === frame }"
        @tap="toggleFrame(frame)"
      >
        <image :src="frame" class="grid-img" mode="aspectFill" />
        <view v-if="selectedFrame === frame" class="check">✔</view>
      </view>
    </view>

    <view v-else class="grid">
      <view
        v-for="(decor, i) in decors"
        :key="i"
        class="grid-item"
        :class="{ active: selectedDecor === decor }"
        @tap="selectedDecor = decor"
      >
        <image :src="decor" class="grid-img" mode="aspectFit" />
        <view v-if="selectedDecor === decor" class="check">✔</view>
      </view>
    </view>

    <canvas
      canvas-id="avatarCanvas"
      class="hidden-canvas"
      style="width: 600px; height: 600px"
    />

    <!-- Login Popup -->
    <LoginPopup ref="loginPopupRef" @logind="handleLogind" />
  </view>
</template>

<script setup>
import { ref, computed } from "vue";
import { onShareAppMessage } from "@dcloudio/uni-app";
import { getBavBarHeight, getDeviceInfo } from "@/utils/system";
import { useUserStore } from "@/stores/user";
import {
  createShareToken,
  getShareReward,
  abilityCheck,
} from "@/api/system.js";
import { avatarDownloadRecord } from "@/api/avatar.js";

const userStore = useUserStore();
const loginPopupRef = ref(null);

const isLoggedIn = computed(() => !!userStore.userInfo.nickName);

const systemAvatars = [
  "https://file.lihailezzc.com/20260109082842_666_1.jpg",
  "https://file.lihailezzc.com/20260108222141_644_1.jpg",
  "https://file.lihailezzc.com/9a929a32-439f-453b-b603-fda7b04cbe08.png",
];
const frames = [
  "https://file.lihailezzc.com/6.png",
  "https://file.lihailezzc.com/7.png",
  "https://file.lihailezzc.com/yunshi.png",
  "https://file.lihailezzc.com/x_CURXRzG4wHF2dp_zu_r-removebg-preview.png",
];
const decors = [
  "https://file.lihailezzc.com/6.png",
  "https://file.lihailezzc.com/7.png",
];

const currentAvatar = ref(systemAvatars[0]);
const selectedFrame = ref("");
const selectedDecor = ref("");
const activeTab = ref("frame");

const toggleFrame = (frame) => {
  if (selectedFrame.value === frame) {
    selectedFrame.value = "";
  } else {
    selectedFrame.value = frame;
  }
};

// 挂饰状态
const decorState = ref({
  x: 300, // 初始中心 X (rpx)
  y: 80, // 初始中心 Y (rpx)
  scale: 1,
  rotate: 0,
});

const decorStyle = computed(() => {
  return {
    transform: `translate(${decorState.value.x - 120}rpx, ${
      decorState.value.y - 120
    }rpx) rotate(${decorState.value.rotate}deg) scale(${
      decorState.value.scale
    })`,
  };
});

// 触摸状态
let startTouches = [];
let initialDecorState = {};

const getDistance = (p1, p2) => {
  const x = p1.clientX - p2.clientX;
  const y = p1.clientY - p2.clientY;
  return Math.sqrt(x * x + y * y);
};

const getAngle = (p1, p2) => {
  const x = p1.clientX - p2.clientX;
  const y = p1.clientY - p2.clientY;
  return (Math.atan2(y, x) * 180) / Math.PI;
};

const onTouchStart = (e) => {
  startTouches = e.touches;
  initialDecorState = { ...decorState.value };
};

const onTouchMove = (e) => {
  if (e.touches.length === 1 && startTouches.length === 1) {
    // 单指移动
    const dx = e.touches[0].clientX - startTouches[0].clientX;
    const dy = e.touches[0].clientY - startTouches[0].clientY;

    // px 转 rpx
    const systemInfo = uni.getSystemInfoSync();
    const ratio = 750 / systemInfo.windowWidth;

    decorState.value.x = initialDecorState.x + dx * ratio;
    decorState.value.y = initialDecorState.y + dy * ratio;
  } else if (e.touches.length === 2 && startTouches.length === 2) {
    // 双指缩放/旋转
    const p1 = e.touches[0];
    const p2 = e.touches[1];
    const startP1 = startTouches[0];
    const startP2 = startTouches[1];

    const currentDist = getDistance(p1, p2);
    const startDist = getDistance(startP1, startP2);

    const currentAngle = getAngle(p1, p2);
    const startAngle = getAngle(startP1, startP2);

    decorState.value.scale =
      initialDecorState.scale * (currentDist / startDist);
    decorState.value.rotate =
      initialDecorState.rotate + (currentAngle - startAngle);
  }
};

const onTouchEnd = () => {
  // 可以在这里做边界检查等
};

const handleLogind = async () => {
  // Logic after successful login if needed
};

const useWeChatAvatar = () => {
  if (!isLoggedIn.value) {
    loginPopupRef.value.open();
  } else {
    currentAvatar.value = userStore.userInfo.avatarUrl;
  }
};

const goBack = () => {
  uni.navigateBack();
};

const saveAndUse = async () => {
  const abilityRes = await abilityCheck("avatar_download");
  if (!abilityRes.canUse) {
    if (
      abilityRes?.blockType === "need_share" &&
      abilityRes?.message === "分享可继续"
    ) {
      uni.showToast({
        title: "分享到群聊可继续使用",
        icon: "none",
      });
      return;
    }
    uni.showToast({
      title: "您今日头像下载次数已用完，明日再试",
      icon: "none",
    });
    return;
  }
  // 调用avatarDownloadRecord API记录下载次数
  await avatarDownloadRecord({
    avatarUrl: currentAvatar.value,
  });
  const ctx = uni.createCanvasContext("avatarCanvas");
  const size = 600;
  const avatarPath = await loadImage(currentAvatar.value);
  ctx.clearRect(0, 0, size, size);
  ctx.drawImage(avatarPath, 0, 0, size, size);
  if (selectedFrame.value) {
    const framePath = await loadImage(selectedFrame.value);
    ctx.drawImage(framePath, 0, 0, size, size);
  }
  if (selectedDecor.value) {
    const decorPath = await loadImage(selectedDecor.value);
    ctx.save();
    // 映射 rpx 坐标到 Canvas 坐标 (假设 1rpx = 1 unit for 600x600 canvas logic)
    // Canvas size is 600, Preview is 600rpx. Ratio is 1:1 in logical space.
    ctx.translate(decorState.value.x, decorState.value.y);
    ctx.rotate((decorState.value.rotate * Math.PI) / 180);
    const scale = decorState.value.scale;
    // 绘制图片，宽高 240
    ctx.drawImage(
      decorPath,
      -120 * scale,
      -120 * scale,
      240 * scale,
      240 * scale,
    );
    ctx.restore();
  }
  ctx.draw(false, () => {
    uni.canvasToTempFilePath({
      canvasId: "avatarCanvas",
      success: (res) => {
        uni.saveImageToPhotosAlbum({
          filePath: res.tempFilePath,
          success: () => {
            uni.showToast({ title: "已保存到相册", icon: "success" });
          },
        });
      },
    });
  });
};

const share = () => {
  uni.showToast({ title: "已生成，可在相册分享", icon: "none" });
};

onShareAppMessage(async () => {
  const deviceInfo = getDeviceInfo();
  const shareTokenRes = await createShareToken({
    targetId: "",
    scene: "avatar_download",
    ...deviceInfo,
  });
  getRewardByShare();

  return {
    title: "制作我的新春头像",
    path: `/pages/avatar/index?shareToken=${shareTokenRes.shareToken}`,
    imageUrl:
      "https://file.lihailezzc.com/resource/b48c41054c2633c478463ac1b1f1ca23.png", // 使用默认封面或 popularCards 的封面
  };
});

const getRewardByShare = async () => {
  const res = await getShareReward({ scene: "avatar_download" });
  if (res.success) {
    uni.showToast({ title: "分享成功，可下载头像" });
    checkDrawStatus();
  }
};

// onShareTimeline(() => {
//   return {
//     title: "制作我的新春头像",
//     imageUrl:
//       "https://file.lihailezzc.com/resource/b48c41054c2633c478463ac1b1f1ca23.png",
//   };
// });

const loadImage = (url) => {
  return new Promise((resolve, reject) => {
    uni.getImageInfo({
      src: url,
      success: (res) => resolve(res.path),
      fail: reject,
    });
  });
};
</script>

<style lang="scss" scoped>
.avatar-page {
  min-height: 100vh;
  background: #fff;
  box-sizing: border-box;
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-bar {
  display: flex;
  align-items: center;
  padding: 16rpx 24rpx;
}
.back {
  font-size: 40rpx;
  margin-right: 12rpx;
}
.nav-title-left {
  font-size: 32rpx;
  font-weight: 600;
}
.preview-card {
  margin: 20rpx 24rpx;
  background: #fff;
  border-radius: 24rpx;
  padding: 24rpx;
  box-shadow: 0 8rpx 20rpx rgba(0, 0, 0, 0.06);
}
.preview-square {
  width: 600rpx;
  height: 600rpx;
  margin: 0 auto;
  border-radius: 24rpx;
  background: #f5dfc9;
  position: relative;
  overflow: hidden;
}
.avatar-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.frame-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.decor-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 240rpx;
  height: 240rpx;
  /* 移除原有的 transform 和 center positioning，改为由 inline style 控制 */
}
.preview-tip {
  display: block;
  text-align: center;
  color: #999;
  font-size: 22rpx;
  margin-top: 12rpx;
}
.interaction-tip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12rpx;
  margin-top: 20rpx;
  font-size: 24rpx;
  color: #ff3b30;
  background: #fff0f0;
  padding: 12rpx 32rpx;
  border-radius: 999rpx;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}
.tip-divider {
  color: #ffccc7;
  margin: 0 4rpx;
}

.action-buttons {
  display: flex;
  padding: 0 48rpx;
  gap: 32rpx;
  margin-top: 32rpx;
}

.btn {
  flex: 1;
  height: 88rpx;
  border-radius: 999rpx;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30rpx;
  font-weight: 600;
  margin: 0;
  padding: 0;
  border: none;
  line-height: normal;
}
.btn::after {
  border: none;
}

.section {
  margin-top: 24rpx;
  padding: 0 24rpx;
}
.section-header {
  display: flex;
  align-items: center;
  margin-bottom: 12rpx;
}
.section-title {
  font-size: 26rpx;
  font-weight: 600;
}
.avatar-scroll {
  width: 100%;
}
.avatar-list {
  display: flex;
}
.avatar-card {
  width: 160rpx;
  height: 160rpx;
  border-radius: 16rpx;
  overflow: hidden;
  margin-right: 16rpx;
  position: relative;
  background: #fff;
  box-shadow: 0 6rpx 16rpx rgba(0, 0, 0, 0.06);
}
.avatar-card.active {
  outline: 4rpx solid #ff3b30;
}

.upload-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #fff5f5;
  border: 2rpx dashed #ffccc7;
  box-sizing: border-box;
}
.upload-icon {
  font-size: 48rpx;
  margin-bottom: 8rpx;
}
.upload-text {
  font-size: 22rpx;
  color: #ff3b30;
  font-weight: 500;
}

.avatar-thumb {
  width: 100%;
  height: 100%;
}
.check {
  position: absolute;
  right: 8rpx;
  top: 8rpx;
  width: 32rpx;
  height: 32rpx;
  border-radius: 50%;
  background: #ff3b30;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22rpx;
}

.tabs {
  display: flex;
  padding: 16rpx 24rpx 8rpx;
  gap: 12rpx;
}
.tab {
  flex: 1;
  text-align: center;
  background: #f7f7f7;
  border-radius: 999rpx;
  height: 64rpx;
  line-height: 64rpx;
  font-size: 26rpx;
  color: #666;
}
.tab.active {
  background: #fff0f0;
  color: #ff3b30;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16rpx;
  padding: 8rpx 24rpx 24rpx;
}
.grid-item {
  height: 200rpx;
  border-radius: 16rpx;
  background: #fff;
  overflow: hidden;
  position: relative;
  box-shadow: 0 6rpx 16rpx rgba(0, 0, 0, 0.06);
}
.grid-item.active {
  outline: 4rpx solid #ff3b30;
}
.grid-img {
  width: 100%;
  height: 100%;
}

.btn.primary {
  background: #ff3b30;
  color: #fff;
  box-shadow: 0 12rpx 24rpx rgba(255, 59, 48, 0.35);
}
.btn.secondary {
  background: #f5f5f5;
  color: #333;
}
.hidden-canvas {
  position: fixed;
  left: -9999px;
  top: -9999px;
}
</style>