一、效果

投诉原因：选择框 picker
投诉描述：多选框 textarea
图片证据：上传图片

二、wxml

<!--返回按钮-->
<view style="margin-top: {{CustomBar*5/8}}px;margin-left: 10px;color: black;">
    <view class="cuIcon-back" bindtap="backPage"></view>
</view>
<!--标题-->
<view class="flex justify-center margin-top">
    <text class="text-xxl text-bold">请填写投诉信息</text>
</view>

<view class="margin">
    <text class="text-gray text-sm">
        非常抱歉给您带来不便，我们重视每一位用户的体验，请填写信息帮助我们明确问题。
    </text>
</view>

<form bindsubmit="ok">
    <!--投诉原因-->
    <view class="cu-form-group margin-top-sm">
        <view class="title text-bold">投诉原因</view>
        <picker bindchange="pickerChange1" value="{{index}}" range="{{picker1}}" name='reason'>
            <view class="picker">
                {{index?picker1[index]:'请选择'}}
            </view>
        </picker>
    </view>
    <!--投诉描述-->
    <view class="cu-bar bg-white margin-top">
        <view class="action">
            <text class="text-bold text-black">投诉描述</text>
        </view>
    </view>
    <view class="cu-form-group">
        <textarea maxlength="-1" placeholder="请填写10子以上的投诉原因以便我们核实情况" name='describe' />
    </view>
    <!--图片证据-->
    <view class="cu-bar bg-white margin-top">
        <view class="action">
            <text class="text-bold text-black">图片证据</text>
            <text>（选填）</text>
        </view>
        <view class="action">
            {{imgList.length}}/4
        </view>
    </view>

    <view class="cu-form-group">
        <view class="grid col-4 grid-square flex-sub">
            <view class="bg-img" wx:for="{{imgList}}" wx:key="*this" bindtap="ViewImage" data-url="{{imgList[index]}}">
                <image src='{{imgList[index]}}' mode='aspectFill'></image>
                <view class="cu-tag bg-red" catchtap="DelImg" data-index="{{index}}">
                    <text class="cuIcon-close"></text>
                </view>
            </view>
            <view class="solids" bindtap="ChooseImage" wx:if="{{imgList.length<4}}">
                <text class="cuIcon-cameraadd"></text>
            </view>
        </view>
    </view>
    <!--按钮-->
    <view class="flex-direction margin">
        <button class="bg-green" formType="submit">提交</button>
    </view>
</form>

<!--弹出框-->
<view class="cu-modal {{modalName=='Modal'?'show':''}}">
    <view class="cu-dialog">
        <view class="cu-bar bg-white justify-end">
            <view class="content">
                <text class="text-bold">投诉成功</text>
            </view>
        </view>

        <view class="bg-white padding-top">
            <icon type="waiting" size="50"></icon>
            <view class="margin-top">我们会在3个工作日处理，并做出改进！</view>
            <button class="bg-green margin" bindtap="exit">返回</button>
        </view>
    </view>
</view>

三、js

const app = getApp();
Page({
    data: {
        CustomBar: app.globalData.CustomBar,
        picker1: ['涉嫌色情', '涉嫌赌博', '利诱（含返利/刷单/抽奖等）', '收款不发货（含虚拟和实体）', '冒充他人诈骗', '其它'],
        imgList: [],
    },
    pickerChange1(e) {
        console.log(e)
        this.setData({
            index: e.detail.value
        })
    },

    ChooseImage() {
        wx.chooseImage({
            count: 4, //默认9
            sizeType: ['original', 'compressed'], //可以指定是原图还是压缩图，默认二者都有
            sourceType: ['album'], //从相册选择
            success: (res) => {
                if (this.data.imgList.length != 0) {
                    this.setData({
                        imgList: this.data.imgList.concat(res.tempFilePaths)
                    })
                } else {
                    this.setData({
                        imgList: res.tempFilePaths
                    })
                }
            }
        });
    },
    ViewImage(e) {
        wx.previewImage({
            urls: this.data.imgList,
            current: e.currentTarget.dataset.url
        });
    },
    DelImg(e) {
        wx.showModal({
            title: '确认删除',
            success: res => {
                if (res.confirm) {
                    this.data.imgList.splice(e.currentTarget.dataset.index, 1);
                    this.setData({
                        imgList: this.data.imgList
                    })
                }
            }
        })
    },

    ok(e) {
        wx.vibrateShort({
            type: 'light',
        })
        console.log(e.detail.value)
        let data = e.detail.value;
        if (data.reason != null) {
            wx.showModal({
                title: '未选择《投诉原因》',
                showCancel: false,
            })
            return;
        }

        if (data.describe != "") {
            wx.showModal({
                title: '未填写《投诉描述》',
                showCancel: false,
            })
            return;
        }

        this.setData({
            modalName: 'Modal',
        })

    },

    exit() {
        wx.vibrateShort({
            type: 'light',
        })
        wx.exitMiniProgram({
            success: (res) => {}
        })
    },
})

样式用了是 colorUI