uni-app实现微信相机

在微信小程序中直接使用uni.chooseMedia即可调用微信相机进行摄录。但为了保持体验的相似性，造一个微信相机的轮子是有必要的

因为小程序的胶囊很碍事，所以对UI进行了调整，功能按钮均移动到页面下方。

本相机支持照片及视频的摄录，拍摄后可进行预览、重拍。采用页面栈的形式进行传值。

使用例：ClockIn.vue（记得先在pages.json中注册）

<template><view><button @click="doCapture">点击摄录</button><image v-if="photoSrc" :src="photoSrc"></image></view><script>export default {data() {return {photoSrc: ""}},methods: {doCapture(){uni.navigateTo({url: '/pages/TakePhotoAndVideo?dest=photoSrc'})}}}</script>
</template>

源代码：TakePhotoAndVideo.vue

<template><view class="complex-camera"><video v-if="videoSrc" :src="videoSrc" style="width: 100vw; height:100vh;z-index: 9800;" autoplay="true" loop="true":controls="false" object-fit="cover"><!-- 其它功能按钮，视频预览用 --><cover-image :src="backIcon" class="complex-camera-back" @click="goBack"></cover-image><cover-image :src="confirmIcon" class="complex-camera-previewer-success" @click="save"></cover-image></video><camera v-else device-position="back" @error="bindError" style="width: 100%; height:100vh;"><cover-view style="height:100vh;"><!-- 其它功能按钮 --><cover-image :src="backIcon" class="complex-camera-back" @click="goBack"></cover-image><cover-image :src="confirmIcon" class="complex-camera-previewer-success" v-if="photoSrc" @click="save"></cover-image><!-- 预览 --><cover-image :src="photoSrc" v-if="photoSrc" style="width: 100vw; height:100vh;z-index: 9800;" /><!-- 拍摄功能按钮 --><cover-view v-if="!photoSrc":class="[recordStartTime==0?'complex-camera-btn-text':'complex-camera-btn-recording-text']">{{hintText}}</cover-view><cover-image v-if="!photoSrc" :src="cameraIcon" @touchstart="handleTouchShutter" @touchend="handleTouchShutter"@longpress="handleTouchShutter" class="complex-camera-btn" /></cover-view></camera></view>
</template><script>let recorderManager = uni.getRecorderManager();let innerAudioContext = uni.createInnerAudioContext('myAudio');innerAudioContext.autoplay = true;let cameraCtx; //相机上下文export default {data() {return {dest: '', //上一页的目标datawindowHeight: '',touchStartTime: 0,recordStartTime: 0, //开始录制时的时间戳photoSrc: '',videoSrc: '',backIcon: 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",}},computed: {hintText() {if (this.recordStartTime === 0) {return "轻触拍照，长按录像";} else {return "录像中"}}},onLoad(e) {this.dest = e.dest;cameraCtx = uni.createCameraContext(); //初始化相机上下文},methods: {handleTouchShutter(e) {switch (e.type) {case "touchstart":this.touchStartTime = e.timeStamp;break;case "longpress":this.recordStartTime = new Date().getTime();//开始视频录制this.takeVideo();break;case "touchend":const touchTime = e.timeStamp - this.touchStartTime; //单位msif (touchTime > 350 || this.recordStartTime != 0) {//结束视频录制uni.showLoading({title: '保存中',mask: true,success: () => {cameraCtx.stopRecord({// 视频压缩经常出问题// compressed: true,success: (res) => {this.stopRecordVideo(res);},complete: (res) => {uni.hideLoading();}})}})} else {//拍照this.takePhoto();}break;}},takePhoto() {this.photoSrc = "";this.videoSrc = "";cameraCtx.takePhoto({quality: 'low',success: (res) => {let photoSrc = res.tempImagePath;//图片压缩则交换注释this.photoSrc = photoSrc;// uni.compressImage({//   src: photoSrc, // 图片路径//   quality: 50, // 压缩质量//   success: (response) => {//     this.photoSrc = response.tempFilePath;//   }// })}});},takeVideo() {//开始录像this.photoSrc = "";this.videoSrc = "";cameraCtx.startRecord({timeoutCallback: (cb) => {uni.showLoading({title: '保存中',mask: true,success: (res) => {this.stopRecordVideo(cb)}})},success: (res) => {console.log("开始录像", new Date())},fail: (err) => {console.log(err)},})},stopRecordVideo(res) {uni.hideLoading();this.recordStartTime = 0;const {tempThumbPath,tempVideoPath} = res;this.videoSrc = tempVideoPath;},goBack() {if (this.photoSrc || this.videoSrc) {this.photoSrc = "";this.videoSrc = "";this.touchStartTime = 0;this.recordStartTime = 0;} else {uni.navigateBack()}},save() {let pages = getCurrentPages();let prevPage = pages[pages.length - 2];prevPage.$vm[this.dest] = this.videoSrc || this.photoSrc;if (this.btn) {prevPage.$vm[this.btn] = false;}uni.navigateBack();},bindError(e) {let _this = this;uni.showModal({title: '提示',content: '请允许摄像头授权',showCancel: false,success: function(res) {if (res.confirm) {uni.openSetting({success(res) {if (res.authSetting['scope.camera']) {uni.navigateBack()}}})}}});},},onUnload() {recorderManager = null;innerAudioContext = null;cameraCtx = null;}}
</script>
<style>page {padding-bottom: 0;}
</style>
<style lang="scss" scoped>$btn-bottom: 100rpx;.complex-camera-btn-text {color: white;position: absolute;left: 260rpx;bottom: $btn-bottom+170rpx;}.complex-camera-btn-recording-text {color: red;position: absolute;left: 330rpx;bottom: $btn-bottom+170rpx;}.complex-camera-btn {z-index: 9000;position: absolute;width: 160rpx;height: 160rpx;left: 295rpx;bottom: $btn-bottom;}// 返回按钮.complex-camera-back {position: absolute;left: 50rpx;bottom: $btn-bottom+56rpx;z-index: 9990;width: 48rpx;height: 48rpx;}//完成按钮.complex-camera-previewer-success {position: absolute;right: 50rpx;bottom: $btn-bottom+56rpx;z-index: 9990;width: 48rpx;height: 48rpx;}
</style>

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