heyang

component/compress.vue

@@ -0,0 +1,175 @@
+<template>
+	<view class="compress">
+		<canvas :style="{ width: canvasSize.width,height: canvasSize.height}" canvas-id="myCanvas"></canvas>
+	</view>
+</template>
+
+<script>
+	export default {
+		data() {
+			return {
+				pic:'',
+				canvasSize: {
+					width: 0,
+					height: 0
+				}
+			}
+		},
+		methods: {
+			// 压缩
+			compress(params) {
+				return new Promise(async (resolve, reject) => {
+					// 等待图片信息
+					let info = await this.getImageInfo(params.src).then(info=>info).catch(err=>err);
+					
+					if(!info){
+						reject('获取图片信息异常');
+						return;
+					}
+					
+					// 设置最大 & 最小 尺寸
+					const maxSize = params.maxSize || 1080;
+					const minSize = params.minSize || 640;
+					
+					// 当前图片尺寸
+					let {width,height} = info;
+					
+					// 非 H5 平台进行最小尺寸校验
+					// #ifndef H5
+					if(width <= minSize && height <= minSize){
+						resolve(params.src);
+						return;
+					}
+					// #endif
+					
+					// 最大尺寸计算
+					if (width > maxSize || height > maxSize) {
+						if (width > height) {
+							height = Math.floor(height / (width / maxSize));
+							width = maxSize;
+						} else {
+							width = Math.floor(width / (height / maxSize));
+							height = maxSize;
+						}
+					}
+
+					// 设置画布尺寸
+					this.$set(this,"canvasSize",{
+						width: `${width}rpx`,
+						height: `${height}rpx`
+					});
+					
+					// Vue.nextTick 回调在 App 有异常，则使用 setTimeout 等待DOM更新
+					setTimeout(() => {
+						const ctx = uni.createCanvasContext('myCanvas', this);
+						ctx.clearRect(0,0,width, height)
+						ctx.drawImage(info.path, 0, 0, uni.upx2px(width), uni.upx2px(height));
+						ctx.draw(false, () => {
+							uni.canvasToTempFilePath({
+								x: 0,
+								y: 0,
+								width: uni.upx2px(width),
+								height: uni.upx2px(height),
+								destWidth: width,
+								destHeight: height,
+								canvasId: 'myCanvas',
+								fileType: params.fileType || 'png',
+								quality: params.quality || 0.9,
+								success: (res) => {
+									// 在H5平台下，tempFilePath 为 base64
+									resolve(res.tempFilePath);
+								},
+								fail:(err)=>{
+									reject(null);
+								}
+							},this);
+						});
+					}, 300);
+				});
+			},
+			// 获取图片信息
+			getImageInfo(src){
+				return new Promise((resolve, reject)=>{
+					uni.getImageInfo({
+						src,
+						success: (info)=> {
+							resolve(info);
+						},
+						fail: () => {
+							reject(null);
+						}
+					});
+				});
+			},
+			// 批量压缩
+			batchCompress(params){
+				// index:进度，done:成功，fail:失败
+				let [index,done,fail] = [0,0,0];
+				// 压缩完成的路径集合
+				let paths = [];
+				// 批量压缩方法
+				let batch = ()=>{
+					return new Promise((resolve, reject)=>{
+						// 开始
+						let start = async ()=>{
+							params.progress && params.progress({
+								done,
+								fail,
+								count:params.batchSrc.length
+							});
+							// 等待图片压缩方法返回
+							let path = await next();
+							if(path){
+								done++;
+								paths.push(path);
+							}else{
+								fail++;
+							}
+							
+							index++;
+							// 压缩完成
+							if(index >= params.batchSrc.length){
+								resolve(true);
+							}else{
+								start();
+							}
+						}
+						start();
+					});
+				}
+				// 依次调用压缩方法
+				let next = ()=>{
+					return this.compress({
+						src:params.batchSrc[index],
+						maxSize:params.maxSize,
+						fileType:params.fileType,
+						quality:params.quality,
+						minSize:params.minSize
+					})
+				}
+				
+				// 全部压缩完成后调用
+				return new Promise(async (resolve, reject)=>{
+					// 批量压缩方法回调
+					let res = await batch();
+					if(res){
+						resolve(paths);
+					}else{
+						reject(null);
+					}
+				});
+			}
+		}
+	}
+</script>
+
+<style lang="scss" scoped>
+	.compress{
+		position: fixed;
+		width: 12px;
+		height: 12px;
+		overflow: hidden;
+		top: -99999px;
+		left: 0;
+	}
+</style>

pages_student/workbench/photoInspection.vue

@@ -37,19 +37,32 @@
 			</view>
 		</view>
 		<view class="up-data-button" @click="upButton">提交</view>
+		<helang-compress ref="helangCompress"></helang-compress>
     </view>
+	
 </template>
 
 <script>
+	import helangCompress from '@/component/compress.vue';
     import { config } from '@/api/request/config.js'
     import { addPhotoInspection,outSubjectList } from '@/api/index.js'
     export default {
+		components: {
+			helangCompress
+		},
         data() {
             return {
 				baseUrl:config.base_url,
                 newData:{},
 				buttonArray:[],
 				buttonArrayIndex:"",
+				
+				params: {
+					maxSize: 400,
+					fileType: 'png',
+					quality: 0.85,
+					minSize: 320
+				}
 
             }
         },
@@ -72,8 +85,6 @@
 				}
 			},
             upButton(){
-				console.log(111)
-				console.log(this.newData)
                 let self = this;
 				if(!this.buttonArrayIndex){
 					uni.showToast({
@@ -119,8 +130,6 @@
             },
             //拍照检查提交
             async addPhotoInspection(){
-				console.log(222)
-				console.log()
 				let obj = {
 					subjectId:this.buttonArray[this.buttonArrayIndex].subjectId,
 					subUrl:this.newData.subUrl,
@@ -151,11 +160,39 @@
                     sizeType: ["original", "compressed"],
                     sourceType: ["album", "camera"],
                     success: function(res) {
-                        let tempFilePaths = res.tempFilePaths[0];
-                        self.uploadImg(tempFilePaths,name);
+                        //let tempFilePaths = res.tempFilePaths[0];
+                        //self.uploadImg(tempFilePaths,name);
+						self.compress(res.tempFilePaths,name);
                     }
                 });
             },
+			//图片压缩
+			compress(tempFilePaths,name) {
+				 let self = this;
+				uni.showLoading({
+					title: '压缩中',
+					mask: true
+				});
+			
+				this.$refs.helangCompress.compress({
+					src: tempFilePaths[0],
+					maxSize: this.params.maxSize,
+					fileType: this.params.fileType,
+					quality: this.params.quality,
+					minSize: this.params.minSize
+				}).then((res) => {
+					uni.hideLoading();
+					console.log('压缩成功')
+					self.uploadImg(res,name);
+					
+				}).catch((err) => {
+					uni.hideLoading();
+					uni.showToast({
+						title: "压缩失败,请重新上传",
+						icon: "none"
+					})
+				})
+			},
             async uploadImg(tempFilePaths,name){
                 var self = this;
                 uni.showLoading({