pasd_app/pages/work/inspection/scanSign/index.vue

<template>
	<view class="container">
		<view class="example">
			<uni-forms ref="dynamicForm" :model="form" label-width="80px">
				<uni-forms-item label="巡检点" name="inspectionPoint">
					<uni-easyinput disabled :value="form.inspectionPoint" placeholder="请输入巡检点"></uni-easyinput>
				</uni-forms-item>
				<uni-forms-item label="巡检要求" name="inspectionRequirements">
					<uni-easyinput type="textarea" disabled :value="form.inspectionRequirements" placeholder="请输入巡检要求"></uni-easyinput>
				</uni-forms-item>
				<uni-forms-item label="图片上传">
					<view class="example-body">
						<uni-file-picker limit="3" :sourceType="sourceType" :value="img" title="最多选择3张图片"
							file-mediatype="image" @delete="deleteImg" @select="upload"
							:auto-upload="false"></uni-file-picker>
					</view>
				</uni-forms-item>
				<!-- 备注 -->
				<uni-forms-item label="备注1" name="remark">
					<uni-easyinput type="textarea" v-model="form.remark" placeholder="请输入备注"></uni-easyinput>
				</uni-forms-item>
			</uni-forms>
			<view class="button-group">
				<button class="btn btn-primary" @click="submit()">提交</button>
				<button class="btn btn-cancel" @click="cancel()">取消</button>
			</view>
		</view>
		<!-- 消息提示框 -->
		<view>
			<uni-popup ref="alertDialog" type="dialog">
				<uni-popup-dialog :type="msgType" title="消息" :content="messageText" @confirm="dialogConfirm"
					showClose="false"></uni-popup-dialog>
			</uni-popup>
		</view>

	</view>
</template>

<script>
	import {
		uploadImg
	} from "@/api/system/user"
	import {
		addRecord
	} from "@/api/inspection/record.js"
	import {
		addWatermarkToImage
	} from "@/utils/watermark.js"
	export default {
		data() {
			return {
				form: {
					inspectionType: 0,
					inspectorId: this.$store.state.user.nickName,
					inspectionPoint: "",
					inspectionRequirements: "",
					inspectionImg: "",
					ImgUrl: [],
					remark: ""
				},
				img: [],
				sourceType: ['camera'],
				imgFiles: "",
				msgType: '',
				messageText: '',
				isUploading: false,
				isMobileBrowser: false // 改为更通用的移动浏览器检测标志
			}
		},
		methods: {
			submit() {
				if (this.isUploading) {
					this.showMessage('warning', '图片正在上传中，请稍等');
					return;
				}
				if (!Array.isArray(this.form.ImgUrl) || this.form.ImgUrl.length === 0) {
					this.showMessage('error', '请选择要上传的图片');
					return;
				}

				this.form.inspectionImg = this.joinList();
				addRecord(this.form).then(res => {
					if (res.code === 200) {
						this.showMessage('success', '打卡成功');
					} else {
						this.showMessage('error', '打卡失败');
					}
				}).catch(err => {
					this.showMessage('error', `提交失败: ${err.message}`);
				});
			},

			deleteImg(e) {
				const index = this.img.findIndex(f => f.path === e.tempFile.path);
				if (index !== -1) {
					this.form.ImgUrl.splice(index, 1);
					this.img.splice(index, 1);
				}
			},

			upload(e) {
				if (e.tempFiles && e.tempFiles.length > 0) {
					this.handleImageUpload(e.tempFiles[0]);
				}
			},

			cancel() {
				uni.reLaunch({
					url: '/pages/work/index'
				});
			},

			joinList() {
				return this.form.ImgUrl.join(',');
			},

			async handleImageUpload(file) {
				this.isUploading = true;
				
				try {
					if (!file || !file.file) {
						throw new Error('无效的文件对象');
					}

					// 生成水印文字
					const watermarkText = `${this.form.inspectionPoint || '未命名地点'} \n${this.getCurrentDate()}`;

					// 添加水印
					let processedFile = await addWatermarkToImage(file.file, watermarkText);
					
					// 如果是移动浏览器且文件大于300KB，则进行压缩
					if (this.isMobileBrowser && processedFile.size > 300 * 1024) {
						console.log('原始文件大小:', (processedFile.size / 1024).toFixed(2), 'KB');
						processedFile = await this.compressImageForMobile(processedFile);
						console.log('压缩后文件大小:', (processedFile.size / 1024).toFixed(2), 'KB');
					}

					// 上传处理后的文件
					const fileUrl = await this.uploadFile(processedFile);
					
					// 更新UI显示
					this.img.push({
						raw: processedFile,
						name: processedFile.name,
						url: fileUrl
					});
					
				} catch (error) {
					console.error("图片处理失败:", error);
					this.showMessage('error', `图片处理失败: ${error.message}`);
				} finally {
					this.isUploading = false;
				}
			},
			
			// 专门为移动浏览器优化的压缩方法
			compressImageForMobile(file, quality = 0.6, maxWidth = 1200, maxHeight = 1200) {
				return new Promise((resolve, reject) => {
					const img = new Image();
					const reader = new FileReader();
					
					reader.onload = (event) => {
						img.onload = () => {
							// 计算压缩比例
							let width = img.width;
							let height = img.height;
							
							// 限制最大尺寸
							if (width > maxWidth || height > maxHeight) {
								const ratio = Math.min(maxWidth / width, maxHeight / height);
								width = Math.floor(width * ratio);
								height = Math.floor(height * ratio);
							}
							
							// 创建canvas
							const canvas = document.createElement('canvas');
							canvas.width = width;
							canvas.height = height;
							
							const ctx = canvas.getContext('2d');
							
							// 设置更高的压缩质量
							ctx.imageSmoothingQuality = 'high';
							ctx.drawImage(img, 0, 0, width, height);
							
							// 使用toBlob的polyfill保证兼容性
							if (canvas.toBlob) {
								canvas.toBlob(
									(blob) => {
										if (!blob) {
											console.warn('压缩失败，返回原始文件');
											resolve(file);
											return;
										}
										
										// 创建压缩后的文件对象
										const compressedFile = new File([blob], file.name, {
											type: 'image/jpeg',
											lastModified: Date.now()
										});
										
										resolve(compressedFile);
									},
									'image/jpeg',
									quality
								);
							} else {
								// 不支持toBlob的浏览器直接返回原文件
								console.warn('浏览器不支持toBlob方法，无法压缩');
								resolve(file);
							}
						};
						
						img.onerror = () => {
							console.warn('图片加载失败，返回原始文件');
							resolve(file);
						};
						
						img.src = event.target.result;
					};
					
					reader.onerror = () => {
						console.warn('文件读取失败，返回原始文件');
						resolve(file);
					};
					
					reader.readAsDataURL(file);
				});
			},

			async uploadFile(file) {
				return new Promise((resolve, reject) => {
					// 创建预览URL用于显示
					const previewUrl = URL.createObjectURL(file);
					
					// 实际上传
					uploadImg({
						filePath: previewUrl
					}).then(res => {
						this.form.ImgUrl.push(res.fileName);
						resolve(previewUrl);
					}).catch(err => {
						reject(err);
					});
				});
			},

			getCurrentDate() {
				const now = new Date();
				const year = now.getFullYear();
				const month = String(now.getMonth() + 1).padStart(2, '0');
				const day = String(now.getDate()).padStart(2, '0');
				const hours = String(now.getHours()).padStart(2, '0');
				const minutes = String(now.getMinutes()).padStart(2, '0');
				const seconds = String(now.getSeconds()).padStart(2, '0');

				return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
			},

			dialogConfirm() {
				if (this.msgType == 'success') {
					uni.reLaunch({
						url: '/pages/work/index'
					});
				}
			},
			
			showMessage(type, text) {
				this.msgType = type;
				this.messageText = text;
				this.$refs.alertDialog.open();
			},
			
			// 检测移动浏览器环境
			checkMobileBrowser() {
				// 更全面的移动设备检测
				const userAgent = navigator.userAgent.toLowerCase();
				const isMobile = /iphone|ipod|android|windows phone|mobile|blackberry/.test(userAgent);
				
				// 如果是通过uni-app的web-view打开，也认为是移动环境
				this.isMobileBrowser = isMobile || window.__uniAppWebview;
			}
		},
		onLoad(option) {
			this.form.inspectionPoint = option.inspectionPoint || '';
			this.form.inspectionRequirements = option.inspectionRequirements || '';
			this.form.inspectionPointId = option.inspectionPointId || '';
		},
		mounted() {
			this.checkMobileBrowser();
		}
	}
</script>


<style lang="scss">
	page {
		display: flex;
		flex-direction: column;
		box-sizing: border-box;
		background-color: #fff;
		height: 90vh;
		/* 使页面高度占满整个视口 */
	}

	.container {
		flex: 1;
		/* 让 container 占满剩余空间 */
		display: flex;
		flex-direction: column;
		/* 设置为列方向 */
	}

	.example {
		flex: 1;
		/* 让 example 占满 container 的剩余空间 */
		display: flex;
		flex-direction: column;
		/* 设置为列方向，确保子元素垂直排列 */
		padding: 15px;
		background-color: #fff;
	}

	// 样式沉底
	.button-group {
		position: fixed;
		bottom: 20px;
		left: 0;
		/* 使用 margin-top: auto 来将按钮组推到 example 容器的底部 */
		display: flex;
		width: 100%;
		justify-content: space-around;
	}

	.button-group button {
		flex: 1;
		background: #fff;
		color: #000;
		/* 使按钮平分可用空间 */
		/* 可能还需要设置一些其他的样式来确保按钮看起来正确，比如 text-align, padding 等 */
	}
</style>