uniapp自定义相机实现示例详解

<template>
	<view class="pengke-camera" :style="{ width: windowWidth, height: windowHeight }">
		<live-pusher
			id="livePusher"
			ref="livePusher"
			class="livePusher"
			mode="FHD"
			beauty="0"
			whiteness="0"
			:aspect="aspect"
			min-bitrate="1000"
			audio-quality="16KHz"
			device-position="back"
			:auto-focus="true"
			:muted="true"
			:enable-camera="true"
			:enable-mic="false"
			:zoom="false"
			@statechange="statechange"
			:style="{ width: windowWidth, height: windowHeight }"
		></live-pusher>
		<view class="menu">
			<!--底部菜单区域背景-->
			<cover-image class="menu-mask" src="/static/live-camera/bar.png"></cover-image>
			<!--返回键-->
			<cover-image class="menu-back" @tap="back" src="/static/live-camera/back.png"></cover-image>
			<!--快门键-->
			<cover-image class="menu-snapshot" @tap="snapshot" src="/static/live-camera/shutter.png"></cover-image>
			<!--反转键-->
			<cover-image class="menu-flip" @tap="flip" src="/static/live-camera/flip.png"></cover-image>
		</view>
	</view>
</template>
<script>
let _this = null;
export default {
	data() {
		return {
			poenCarmeInterval:null,//打开相机的轮询
			aspect: '2:3', //比例
			windowWidth: '', //屏幕可用宽度
			windowHeight: '', //屏幕可用高度
			camerastate: false, //相机准备好了
			livePusher: null, //流视频对象
			snapshotsrc: null, //快照
		};
	},
	onLoad(e) {
		_this = this;
		this.initCamera();
	},
	onReady() {
		this.livePusher = uni.createLivePusherContext('livePusher', this);
		this.startPreview(); //开启预览并设置摄像头
		this.poenCarme();
	},
	methods: {
		//轮询打开
		poenCarme(){
			//#ifdef APP-PLUS
			if (plus.os.name == 'Android') {
				this.poenCarmeInterval = setInterval(function() {
					console.log(_this.camerastate);
					if (!_this.camerastate) _this.startPreview();
				}, 2500);
			}
			//#endif
		},
		//初始化相机
		initCamera() {
			uni.getSystemInfo({
				success: function(res) {
					_this.windowWidth = res.windowWidth;
					_this.windowHeight = res.windowHeight;
					let zcs = _this.aliquot(_this.windowWidth,_this.windowHeight);
					_this.aspect = (_this.windowWidth/zcs)+':'+(_this.windowHeight/zcs);
					// console.log('画面比例：'+_this.aspect);
				}
			});
		},
		//整除数计算
		aliquot(x, y) {
			if (x % y == 0) return y;
			return this.aliquot(y, x % y);
		},
		//开始预览
		startPreview() {
			this.livePusher.startPreview({
				success: a => {
					console.log(a)
				}
			});
		},
		//停止预览
		stopPreview() {
			this.livePusher.stopPreview({
				success: a => {
					_this.camerastate = false;
				}
			});
		},
		//状态
		statechange(e) {
			//状态改变
			console.log(e);
			if (e.detail.code == 1007) {
				_this.camerastate = true;
			} else if (e.detail.code == -1301) {
				_this.camerastate = false;
			}
		},
		//返回
		back() {
			uni.navigateBack();
		},
		//抓拍
		snapshot() {
			//震动
			uni.vibrateShort({
			    success: function () {
			        console.log('success');
			    }
			});
			//拍照
			this.livePusher.snapshot({
				success: e => {
					_this.snapshotsrc = e.message.tempImagePath;
					_this.stopPreview();
					_this.setImage();
					uni.navigateBack();
				}
			});
		},
		//反转
		flip() {
			this.livePusher.switchCamera();
		},
		//设置
		setImage() {
			let pages = getCurrentPages();
			let prevPage = pages[pages.length - 2];
			prevPage.$vm.setImage({ path: _this.snapshotsrc});
		}
	}
};
</script>
<style lang="less">
.pengke-camera {
	justify-content: center;
	align-items: center;
	.menu {
		position: absolute;
		left: 0;
		bottom: 0;
		width: 750rpx;
		height: 180rpx;
		z-index: 98;
		align-items: center;
		justify-content: center;
		.menu-mask {
			position: absolute;
			left: 0;
			bottom: 0;
			width: 750rpx;
			height: 180rpx;
			z-index: 98;
		}
		.menu-back {
			position: absolute;
			left: 30rpx;
			bottom: 50rpx;
			width: 80rpx;
			height: 80rpx;
			z-index: 99;
			align-items: center;
			justify-content: center;
		}
		.menu-snapshot {
			width: 130rpx;
			height: 130rpx;
			z-index: 99;
		}
		.menu-flip {
			position: absolute;
			right: 30rpx;
			bottom: 50rpx;
			width: 80rpx;
			height: 80rpx;
			z-index: 99;
			align-items: center;
			justify-content: center;
		}
	}
}
</style>

setImage(e){
//e.path即是图片临时路径
uni.uploadFile({
	url: '上传接口的路径',
	filePath: e.path,
	name: 'imageFile',
	success: function(res) {
		//服务器返回的图片地址url
	},
	error: function(err) {
		console.log(err)
	}
}

uni.chooseImage({
	count: size, //默认9
	sizeType: ['original', 'compressed'], //可以指定是原图还是压缩图，默认二者都有
	sourceType: ['album'], //从相册选择
	success: function (res) {
		console.log(res)//拿到临时路径再向后端发送上传请求....
	}
});