微信小程序调取相机实现拍照/录屏

1.效果

2.创建子组件

index.wxml代码

<xr-scene id="xr-scenecameraglb" ar-system bind:ready="handleReady" bind:ar-ready="handleARReady" >
<!-- 初始化模型 -->
  <xr-assets bind:loaded="handleAssetsLoaded">
    <!-- 最后一帧模型 -->
    <xr-asset-load type="gltf" asset-id="gltf-table2" src="https://cyvideo.i-oranges.com/ar/ds2024/zd.glb" />
  </xr-assets>
  <xr-env env-data="xr-frame-team-workspace-day"/>
  <xr-node>
    <xr-node node-id="camera-target" position="0 0 0"></xr-node>
    <xr-node node-id="table-wrap" position="0 0 0">
      <!-- <xr-gltf  id="wxball-3"
        node-id="mesh-gltf-table" 
        position="0 -4 -9"  scale="0.02 0.02 0.02" rotation="360 0 0"
        model="gltf-table2" 
        animation="animation-key"
        anim-autoplay  /> -->
        <!-- 挪位置 -->
        <!-- <xr-gltf  id="wxball-3"
        node-id="mesh-gltf-table" 
        position="-7 -8 -9"  scale="0.018 0.018 0.018" rotation="360 50 0"
        model="gltf-table2" 
        animation="animation-key"
        anim-autoplay  /> -->
    </xr-node>
    <!-- 跟着挪位置 -->
    <!-- <xr-camera
    position="1 1 1" target="gltf-table" clear-color="0.925 0.925 0.925 1"
      background="ar" 
      far="2000"  target="camera-target" 
    /> -->
    <!-- 不跟着挪位置 -->
    <!-- is-ar-camera -->
    <xr-camera
       position="1 1 1" target="gltf-table2" clear-color="0.925 0.925 0.925 1"
      background="ar" 
      far="2000"  is-ar-camera
    />
  </xr-node>
  <xr-node node-id="lights">
<!-- 第一帧最后一秒模型 -->
    <xr-light   type="ambient" color="1 1 1" intensity="1" />
    <xr-light   type="directional" rotation="40 170 0" color="1 1 1" intensity="12" />
    <xr-light   type="directional" rotation="0 60 0" color="1 1 1" intensity="12" />
    <xr-light   type="directional" rotation="180 180 180" color="1 1 1" intensity="12" />
    <xr-light   type="directional" rotation="360 360 360" color="1 1 1" intensity="12" />
    <xr-light   type="point" position="0 0 0" color="1 0 0" range="3" intensity="12" />
  </xr-node>
</xr-scene>

index.js代码

const STATE = {
  NONE: -1,
  MOVE: 0,
  ZOOM_OR_PAN: 1
}

Component({
  behaviors: [require('../../common/share-behavior').default],
  properties: {
    isTouchstart: {
      type: Boolean // 判断是否需要关闭子组件的触碰事件
    },
    a: {
      type: Number
    }
  },
  markerGlb: {
    type: String
  },
  position: {
    type: Object
  },
  rotation: {
    type: Object
  },
  scale: {
    type: Object
  },

  data: {
    grandeShow: true, //默认引导图标显示
    loaded: false,
    arReady: false,
    placedFlag: true, //是否允许模型再次移动识别展示在地平线
  },
  lifetimes: {
    async attached() {
      console.log('data', this.data)

    }
  },
  methods: {
    handleReady({
      detail
    }) {
      const xrScene = this.scene = detail.value;
      // 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
      })
      console.log('xr-scene', xrScene);
    },
    handleAssetsProgress: function ({
      detail
    }) {
      console.log('assets progress', detail.value);
    },
    handleAssetsLoaded: function ({
      detail
    }) {
      console.log('assets loaded', detail.value);
      // 隐藏加载中提示
      wx.hideLoading()
      this.setData({
        loaded: true
      });
    },
    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);
    },
  }
})```
index.json代码

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

3.创建页面


index.wxml代码

<view  style="color: white;">
  <pure-camera id="pure-camera" width="{{renderWidth}}" height="{{renderHeight}}" style="width:{{width}}px;height:{{height}}px;top:{{top}}px;left:{{left}}px;display:block;">
  </pure-camera>
    <view style="position:fixed;left: 0;z-index: 99999;bottom: 5vw;width: 100vw;height: 100px;display: flex;justify-content: space-evenly;align-items: center;">
    <image bind:tap="captureScreen" src=" 拍照按钮图片" style="width: 250rpx;height: 91rpx;"></image>
     <button bind:tap="screen" style="width: 250rpx;height: 91rpx;">录屏</button>
  </view>
</view>

index.js代码

var sceneReadyBehavior = require('../../behavior-scene/scene-ready');//微信官方文档demo里有
var handleDecodedXML = require('../../behavior-scene/util').handleDecodedXML;//微信官方文档demo里有
Page({
  data: {
     flag: false, //录屏默认关闭
  },
    onUnload() {
    this.musicbg.stop();
    // 清除video定时器
    // clearTimeout(this.data.time3);
  },
  onShow() {
    /*
     * 设置页面常亮
     */
    wx.setKeepScreenOn({
      keepScreenOn: true,
      fail() {
        //如果失败 再进行调用
        wx.setKeepScreenOn({
          keepScreenOn: true
        });
      }
    });
  },
  onHide() {
    this.musicbg.stop();
    this.setData({
      video2: false
    })
  },
  onLoad(options) {
    wx.setNavigationBarTitle({
      title: "标题"
    })
    // 背景音乐
    this.musicbg = wx.createInnerAudioContext()
    this.musicbg.src = "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();
  },
  //拍照
    captureScreen: function () {
    // this.openMusic.play();
    let that = this;
    //获取手势识别场景
    let xrScene = this.selectComponent('#pure-camera').scene;
    this.setData({
      isTouchstart: true
    })
    //分享好友、保存本地图片
    xrScene.scene.share.captureToFriends({
      fileType: "jpg",
      quality: 0.8
    }).then(res => { });

  },
   //录屏
  screen: function () {
    this.setData({
      flag: !this.data.flag
    })
    //获取手势识别场景
    let xrScene = this.selectComponent('#pure-camera').scene;
    if (!this.data.flag) { //关闭录屏
      xrScene.scene.share.recordFinishToAlbum();
    } else { //开启录屏
    
      xrScene.scene.share.recordStart();
    }
  },
})