uni-app开发(5)---上传多图组件开发

在开发发表日志、博客之类的功能时，往往用到上传组件上传一张或者多张图片，功能需求及效果图如下：

效果图：

需求：

在点击上传标志时，可以选择拍照或者手机相册上传，点击右上角的删除按钮，可以删除当前上传的图片。

---

代码分析 

HTML

<view class="uni-list list-pd">
			<view class="uni-list-cell cell-pd">
				<view class="uni-uploader">
					<view class="uni-uploader-head">
						<view class="uni-uploader-title">点击可预览选好的图片</view>
						<view class="uni-uploader-info">{{imageList.length}}/9</view>
					</view>
					<view class="uni-uploader-body">
						<view class="uni-uploader__files">
							<block v-for="(image,index) in imageList" :key="index">
								<view class="uni-uploader__file">
									<view class="icon iconfont icon-shanchu" @tap="delect(index)"></view>
									<image class="uni-uploader__img" :src="image" :data-src="image" @tap="previewImage"></image>
								</view>
							</block>
							<view class="uni-uploader__input-box">
								<view class="uni-uploader__input" @tap="chooseImage"></view>
							</view>
						</view>
					</view>
				</view>
			</view>
		</view>

---

 JS

<script>
	var sourceType = [
		['camera'],
		['album'],
		['camera', 'album']
	]
	var sizeType = [
		['compressed'],
		['original'],
		['compressed', 'original']
	]
	let changelook = ['所有人可见', '仅自己可见'];
	import uniNavBar from '@/components/uni-nav-bar/uni-nav-bar.vue'
	export default {
		components: {
			uniNavBar,
		},
		data() {
			return {
				text:'66666',
				yinsi: '所有人可见',
				imageList: [],
				sourceTypeIndex: 2,
				sourceType: ['拍照', '相册', '拍照或相册'],
				sizeTypeIndex: 2,
				sizeType: ['压缩', '原图', '压缩或原图'],
				countIndex: 8,
				count: [1, 2, 3, 4, 5, 6, 7, 8, 9]
			}
		},
		methods: {
			back() {
				uni.navigateBack({
					delta: 1
				});
			},
			submit() {
				console.log('发布');
			},
			changeLook() {
				uni.showActionSheet({
					itemList: changelook,
					success: (res) => {
						console.log(res);
						console.log('选中了第' + (res.tapIndex + 1) + '个按钮');
						this.yinsi = changelook[res.tapIndex];
					},
					fail: (res) => {
						console.log(res.errMsg);
					}
				});
			},
			
			// 选择图片
			chooseImage: async function() {
			    if (this.imageList.length === 9) {
					return;
			    }
			    uni.chooseImage({
			        sourceType: sourceType[this.sourceTypeIndex],
			        sizeType: sizeType[this.sizeTypeIndex],
			        count: this.imageList.length + this.count[this.countIndex] > 9 ? 9 - this.imageList.length :
			            this.count[this.countIndex],
			        success: (res) => {
			            this.imageList = this.imageList.concat(res.tempFilePaths);
						console.log(this.imageList.length,'照片数量')
			        }
			    })
			},
			
			
			previewImage: function(e) {
			    var current = e.target.dataset.src
			    uni.previewImage({
			        current: current,
			        urls: this.imageList
			    })
			},
			delect(index){
				uni.showModal({
				    title: '提示',
				    content: '是否删除该图片？',
				    success: (res) =>{
				        if (res.confirm) {
				            this.imageList.splice(index, 1)
				        } 
				    }
				});
			}
		}
	}
</script>

代码分析：

1、变量sourceType、sizeType分别表示照片来源（拍照或者相册）与照片大小处理方式（原始或者压缩）。

2、chooseImage表示选择照片，previewImage表示预览图片。