blindDate/pages/saySomething/saySomething.vue

<template>
	<view class="content">
		<!-- 文本输入 -->
		<textarea class="textarea" placeholder="这一刻的想法…" v-model="content"></textarea>
		<!-- 上传图片 -->
		<view class="my-images">
			<view class="my-image-item" @click="uploadImage" v-if="image_list.length < 6">
				<text class="lf-iconfont icon-jia my-image-item-after"></text>
			</view>
			<view class="my-image-item" v-for="(item, index) in image_list" :key="index" @click="lookImage(index)">
				<image :src="item" mode="aspectFill"></image>
				<view class="remove-image" @click.stop="removeInage(index)">
					<text class="lf-iconfont icon-shanchu"></text>
				</view>
			</view>
		</view>
		<!-- 发表按钮 -->
		<button class="my-btn" hover-class="lf-opacity">发表</button>
	</view>
</template>

<script>
	export default {
		data(){
			return {
				image_list: [],
				image_count: 6,
				content: ''
			}
		},
		watch: {
			// #ifdef MP-WEIXIN
			content(val){
				if(String(val).length){
					// 监听微信小程序页面返回，弹出询问框
					wx.enableAlertBeforeUnload({
						message: '您已输入文字，但未发表，离开后已输入的文字将清空，确定离开？',
						complete: result => {
							console.log("result", result);
						}
					})
				}else{
					wx.disableAlertBeforeUnload(); // 关闭监听
				}
			}
			// #endif
		},
		onLoad(){
			
		},
		methods: {
			// 上传凭证图片
			uploadImage(){
				let current_count = this.image_count - this.image_list.length;
				if(current_count == 0) return;
				uni.chooseImage({
					count: current_count,
					complete: result => {
						let tempFiles = result.tempFiles;
						let image_list = [];
						let overstep = false;
						tempFiles.map(item => {
							// 上传的图片需小于10MB
							if(item.size < 10464788){
								image_list.push(item.path);
							}else{
								overstep = true;
							}
						})
						if(overstep){
							uni.showModal({
								title: '温馨提示',
								content: '您上传的图片含有超出10M大小的限制，请优化大小后再上传！',
								showCancel: false
							})
						}
						this.image_list.push(...image_list);
					}
				})
			},
			// 预览图片
			lookImage(current){
				if(this.image_list.length <= 0) return;
				this.$u.throttle(() => {
					uni.previewimage({
						images: this.image_list,
						current: current
					});
				}, 500);
			},
			// 移除图片
			removeInage(current){
				this.image_list.splice(current, 1);
			}
		}
	}
</script>

<style lang="scss" scoped="scoped">
	.content{
		width: 750rpx;
		height: max-content;
		box-sizing: border-box;
		padding: 30rpx 32rpx;
		.textarea{
			width: 100%;
			height: 160rpx;
			padding: 10rpx 0;
		}
	}
	
	.my-images{
		display: flex;
		flex-wrap: wrap;
		margin-top: 30rpx;
		margin-bottom: 18rpx;
		.my-image-item{
			width: 220rpx;
			height: 220rpx;
			background: #DDDDDD;
			position: relative;
			margin-right: 12rpx;
			&:nth-child(3n){
				margin-right: 0rpx;
			}
			&:nth-child(n+4){
				margin-top: 12rpx;
			}
			image{
				width: 100%;
				height: 100%;
			}
			.remove-image{
				position: absolute;
				right: -4rpx;
				top: -18rpx;
				color: #e74c3c;
				font-size: 40rpx;
				padding: 8rpx;
			}
		}
		.my-image-item-after{
			position: absolute;
			width: 100%;
			height: 100%;
			display: flex;
			justify-content: center;
			align-items: center;
			font-size: 60rpx;
			color: #999999;
		}
	}
	
	.my-btn{
		margin-top: 30rpx;
		background-color: #E21196;
		color: #FFFFFF;
	}
	
	/deep/.textarea-placeholder{
		color: #999999;
	}
</style>