原生微信小程AR序实现模型动画播放只播放一次，且停留在最后一秒

1.效果展示

0868d9b9f56517a9a07dfc180cddecb2

2.微信小程序AR是2023年初发布，还有很多问提（比如glb模型不能直接播放最后一帧；AR识别不了金属、玻璃材质的模型等...有问题解决了的小伙伴记得告诉我一声）
微信官方文档地址
3.代码展示，我用的是微信官方文档案例 demo框架。官方文档demo

4.代码展示
先创建组件xr-ar-cameraglb

index.wxml代码

html 复制代码

<xr-scene id="xr-scenecameraglb" ar-system bind:ready="handleReady" bind:ar-ready="handleARReady" bind:ar-error="handleARError">
  <!-- 初始化模型 handleAssetsLoaded初始化模型加载完毕    handleAssetsProgress模型加载进度 1是加载完毕-->
  <xr-assets bind:progress="handleAssetsProgress" bind:loaded="handleAssetsLoaded">
    <!-- <xr-asset-load type="gltf" asset-id="gltf-table" src="glb模型" /> -->
    <xr-asset-load type="gltf" asset-id="gltf-table" src="要呈现的模型glb" />
  </xr-assets>
  <xr-env env-data="xr-frame-team-workspace-day" />
  <xr-node>
  <!-- 跟随手机移动 position="0 0 -1" -->
    <xr-node node-id="table-wrap" position="0 0 -1">
      <!-- 初始化模型 
      position：位置调整  x y z
      scale:缩放调整   x y z
-->
      <xr-gltf wx:if="{{modeShow}}" id="wxball-2" bind:touch-shape="handleTouchWXball" bind:gltf-loaded="handleGLTFLoaded" node-id="mesh-gltf-table" scale="0.25 0.25 0.25" position="0.1 -0.5 -2.9" rotation="-355 0 0" model="gltf-table" animation="animation-key" anim-autoplay />
    </xr-node>
    <!--不跟随手机移动 position="2 1 10"  near="0.0001" is-ar-camera-->
    <!-- <xr-camera target="gltf-table" is-ar-camera  clear-color="0.925 0.925 0.925 1" background="ar" far="2000"  /> -->
    <!-- 跟随手机移动 -->
    <xr-camera 
  clear-color="0.4 0.6 0.7 1"
  background="ar" target="table-wrap" far="2000" 
/>
  </xr-node>
  <xr-node node-id="lights">
    <!-- 初始化模型 -->
    <xr-light type="ambient" color="1 1 1" intensity="1.5" />
    <!-- 点光源 -->
    <xr-light type="point" position="0 0 0" color="1 1 1" range="20" intensity="10" />
  </xr-node>
</xr-scene>

index.json代码

html 复制代码

{
  "component": true,
  "usingComponents": {},
  "renderer": "xr-frame"
}

index.js代码

html 复制代码

Component({
  behaviors: [require('../common/share-behavior').default],
  data: {
    loaded: false,
    modeShow: false
  },
  lifetimes: {
    attached() {
      // console.log('data.a', this.data.a) // expected 123
    }
  },
  methods: {
    handleGLTFLoaded({
      detail
    }) {
      let that = this;
      console.log("初始化模型加载结束");
      this.triggerEvent('changeShow', {
        isshows: true
      });
    },
    handleTouchWXball: function () {},
    handleReady({
      detail
    }) {
      // 显示加载中提示
      wx.showLoading({
        title: '加载中',
        mask: true // 是否显示透明蒙层，防止用户点击其他区域
      })
      const xrScene = this.scene = detail.value;
    },
    handleAssetsProgress: function ({
      detail
    }) {
      if (detail.value.progress == 1) { //组件加载完毕
        // console.log('初始化模型相机', detail.value.progress);
      }
    },
    handleAssetsLoaded: function ({
      detail
    }) {
      // console.log('模型加载完毕111', detail.value);
      // 隐藏加载中提示
      let that = this;
      wx.hideLoading();
      setTimeout(res => {
        this.setData({
          modeShow: true, //显示模型
          loaded: true
        })
        this.triggerEvent('changeLoaded', {
          changeLoaded: true
        });
        // 4秒后暂停模型
        setTimeout(() => {
          // console.log('模型加载完毕111');
          const animator1 = that.scene.getElementById('wxball-2').getComponent("animator");
          animator1.pause();
          this.triggerEvent('changeShow', {
            isshows: true
          });
        }, 10000)
      }, 100)
    },
    handleARReady: function ({
      detail
    }) {
      console.log('ar-ready', this.scene.ar.arModes, this.scene.ar.arVersion);
    },
    handleARError: function ({
      detail
    }) {
      console.log('ar-error', detail);
    },
    handleLog: function ({
      detail
    }) {
      const {
        el,
        value
      } = detail;
      console.log('log', detail.value);
    },
  }
})

5.在page创建父组件scene-ar-germanBusiness

在app.json里注册理由

html 复制代码

"pages/ar/scene-ar-germanBusiness/index",

index.wxml文件代码

html 复制代码

<view>
 <!-- 初始化模型 -->
  <xr-demo-viewer>
  <xr-ar-cameraglb
      bind:changeShow="changeShow"
      bind:changeLoaded="changeLoaded"
        disable-scroll
        id="main-frame1"
        width="{{renderWidth}}"
        height="{{renderHeight}}"
        style="width:{{width}}px;height:{{height}}px;top:{{top}}px;left:{{left}}px;display:block;"
      />
  </xr-demo-viewer>
</view>

index.json代码子组件地址根据自己的路径来 xr-demo-viewer组件在官方文档demo里面有

html 复制代码

{
  "usingComponents": {
    "xr-demo-viewer": "../../../components/xr-demo-viewer/index",
    "xr-ar-cameraglb": "../../../components/xr-ar-cameraglb/index"
  },
  "disableScroll": true
}

index.js代码

html 复制代码

var sceneReadyBehavior = require('../../behavior-scene/scene-ready');
var handleDecodedXML = require('../../behavior-scene/util').handleDecodedXML;
Page({
data:{
musicbg: null,//菜单音乐
},
  onUnload() {
    this.musicbg.stop();
    // 清除video定时器
    // clearTimeout(this.data.time3);
  },
   onHide() {
    this.musicbg.stop();
  },
    onLoad(options) {
    wx.setNavigationBarTitle({
      title: "AR"
    })
    let that = this;
    // 背景音乐
    this.musicbg = wx.createInnerAudioContext()
    this.musicbg.src = "https://cyvideo.i-oranges.com/ar/ds2024/music-1.mp3";//背景音乐线上地址
    this.musicbg.volume = 0.6;
    this.musicbg.loop = true;
    //初始化如果是视频则显示背景音乐;模型则注释该代码
    this.musicbg.play();
    // 关闭主页按钮
   // wx.hideHomeButton();
  },
  //关闭初始化模型
  changeShow: function (e) {
    // this.closeMusic.play();
    if (e.detail.isshows) {
      setTimeout(res => {
        // 4秒播放完成后展示菜单和最后一帧
        this.setData({
          // video1: true,
          // gestureShow: 3,
          // tipsTu: true,
          // loadMeaunShow: true
        })
        // this.firstMusic.pause();//关闭初始化模型音乐
      }, 10000)
    }
  },
    //初始化模型
  changeLoaded:function(event){
    console.log('初始化模型=============',event.value);
    this.musicbg.play();
  },
})

以上就是我呕心沥血的橙果，家人们记得点赞收藏呀~