daShangDao_scanBook/pages/upload/camera_capture.nvue

<template>
	<view class="cc-page">
		<!-- 相机预览 -->
		<ima-camera-view
			ref="cameraRef"
			:style="'width:' + winWidth + 'px;height:' + winHeight + 'px;'"
			flash="off"
			facing="back"
			@onPictureTaken="onPictureTaken"
			@onCameraOpened="onCameraOpened"
		></ima-camera-view>

		<!-- 顶部 -->
		<view class="cc-topbar" style="padding-top:50px;">
			<text class="cc-topbar-title">{{ capturedList.length > 0 ? '已拍 '+capturedList.length+'/9 张' : '拍照' }}</text>
			<text class="cc-topbar-confirm" @click="confirmCapture">确认 ({{ capturedList.length }})</text>
		</view>

		<!-- 底部 -->
		<view class="cc-footer" style="padding-bottom:30px;">
			<text class="cc-footer-cancel" @click="goBack">取消</text>
			<view class="cc-capture-btn" @click="capturePhoto">
				<view class="cc-capture-inner"></view>
			</view>
			<view class="cc-flip-btn" @click="flipCamera">
				<text class="cc-flip-icon">↺</text>
			</view>
		</view>

		<!-- 缩略图 -->
		<view class="cc-thumb-bar" v-if="capturedList.length > 0">
			<scroll-view scroll-x="true" show-scrollbar="false" style="flex-direction:row;">
				<view style="flex-direction:row;">
					<view class="cc-thumb-item" v-for="(img, idx) in capturedList" :key="idx">
						<image class="cc-thumb-img" :src="img" mode="aspectFill"></image>
						<view class="cc-thumb-del" @click.stop="deletePhoto(idx)">
							<text class="cc-del-icon">✕</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				capturedList: [],
				cameraReady: false,
				facing: 'back',
				winWidth: 750,
				winHeight: 1334
			}
		},
		onLoad() {
			var that = this
			uni.getSystemInfo({
				success: function(res) {
					that.winWidth = res.windowWidth
					that.winHeight = res.windowHeight
				}
			})
		},
		methods: {
			onCameraOpened() {
				this.cameraReady = true
				console.log('相机已就绪')
			},
			capturePhoto() {
				if (this.capturedList.length >= 9) {
					uni.showToast({ title: '最多拍9张', icon: 'none' })
					return
				}
				if (!this.cameraReady) {
					uni.showToast({ title: '相机未就绪', icon: 'none' })
					return
				}
				this.$refs.cameraRef.takePhoto()
			},
			onPictureTaken(e) {
				var path = ''
				if (e.detail) {
					path = e.detail.path || ''
				}
				if (path) {
					this.capturedList.push(path)
				}
			},
			flipCamera() {
				this.facing = this.facing === 'back' ? 'front' : 'back'
				this.$refs.cameraRef.changeFacing(this.facing)
			},
			deletePhoto(idx) {
				this.capturedList.splice(idx, 1)
			},
			goBack() {
				if (this.capturedList.length > 0) {
					uni.showModal({
						title: '提示',
						content: '确定取消拍照吗？已拍照片将丢失',
						success: function(res) {
							if (res.confirm) { uni.navigateBack() }
						}
					})
				} else {
					uni.navigateBack()
				}
			},
			confirmCapture() {
				if (this.capturedList.length === 0) {
					uni.showToast({ title: '请先拍照', icon: 'none' })
					return
				}
				var pages = getCurrentPages()
				var prevPage = pages[pages.length - 2]
				if (prevPage) {
					prevPage.$vm.capturedPhotoList = this.capturedList
				}
				uni.navigateBack()
			}
		}
	}
</script>

<style>
	.cc-page {
		flex: 1;
		background-color: #000000;
	}
	/* 顶部 */
	.cc-topbar {
		position: absolute;
		top: 0; left: 0; right: 0;
		height: 100px;
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
		padding-left: 30rpx;
		padding-right: 30rpx;
		z-index: 8;
		background: linear-gradient(to bottom, rgba(0,0,0,0.4), transparent);
	}
	.cc-topbar-title {
		color: #ffffff;
		font-size: 32rpx;
		font-weight: bold;
	}
	.cc-topbar-confirm {
		color: #409eff;
		font-size: 28rpx;
		font-weight: bold;
		padding-left: 24rpx;
		padding-right: 24rpx;
		padding-top: 10rpx;
		padding-bottom: 10rpx;
		border-radius: 32rpx;
		background-color: rgba(64,158,255,0.15);
	}
	/* 底部 */
	.cc-footer {
		position: absolute;
		bottom: 0; left: 0; right: 0;
		height: 180rpx;
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
		padding-left: 40rpx;
		padding-right: 40rpx;
		z-index: 8;
		background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
	}
	.cc-footer-cancel {
		color: #ffffff;
		font-size: 28rpx;
	}
	.cc-capture-btn {
		width: 80rpx; height: 80rpx;
		border-radius: 80rpx;
		border-width: 6rpx; border-color: #ffffff; border-style: solid;
		align-items: center; justify-content: center;
	}
	.cc-capture-inner {
		width: 60rpx; height: 60rpx;
		border-radius: 60rpx;
		background-color: #ffffff;
	}
	.cc-flip-btn {
		width: 64rpx; height: 64rpx;
		border-radius: 64rpx;
		border-width: 2rpx; border-color: rgba(255,255,255,0.4); border-style: solid;
		align-items: center; justify-content: center;
	}
	.cc-flip-icon {
		color: #ffffff;
		font-size: 32rpx;
	}
	/* 缩略图 */
	.cc-thumb-bar {
		position: absolute;
		bottom: 190rpx; left: 0; right: 0;
		padding-left: 20rpx; padding-right: 20rpx; padding-top: 10rpx; padding-bottom: 10rpx;
		z-index: 8;
	}
	.cc-thumb-item {
		width: 100rpx; height: 100rpx;
		border-radius: 8rpx; overflow: hidden;
		position: relative;
		border-width: 2rpx; border-color: rgba(255,255,255,0.3); border-style: solid;
		margin-right: 12rpx;
		background-color: #333333;
	}
	.cc-thumb-img {
		width: 100rpx; height: 100rpx;
	}
	.cc-thumb-del {
		position: absolute;
		top: -6rpx; right: -6rpx;
		width: 32rpx; height: 32rpx;
		border-radius: 32rpx;
		background-color: rgba(0,0,0,0.6);
		align-items: center; justify-content: center;
	}
	.cc-del-icon {
		color: #ffffff;
		font-size: 18rpx;
	}
</style>