效果图

布局：

<view class="pop_tSet">
			<view class="pop_Con">
				<view class="box_bb">
					<view class="bb_title">
						{{titleObj[popType]}}
					</view>
				</view>
				<view class="box_bb_bot">
					<view class="bnt_left">
							<view class="btn_item" v-for="(it,index) in timeSetEndObj" :key="index"
								@click="endItem(index)" :class="{'btn_active':index==endTab}">
								{{it}}
							</view>
					</view>
					<view class="bnt_right">
						<view class="btn_item_con">
							<view class="text_s" v-if="popType=='start'||(popType=='end'&&endTab==1)">
								<template v-if="startTab==1">
									<u-icon name="question-circle-fill" color="#0080FF" style="margin-right: 10rpx;"
										size="30"></u-icon>
									提前{{dayNum}}天开放预约
								</template>
							</view>
							<view class="set_form">
								<u-form :model="startForm" ref="uForm" label-position="left">
									<template v-if="popType=='start'">
											<u-form-item label="提前几天开放:" prop="startDay" :required="true"
												label-width="200" :border-bottom="false" label-align="right">
												<uni-data-select v-model="startForm.startDay" :localdata="rangeDay"
													:clear="false"></uni-data-select>
											</u-form-item>
											<u-form-item label="开放时间:" prop="startTime" label-width="auto"
												:border-bottom="false" label-align="right">
												<u-input v-model="startForm.startTime" type="select" :border="true"
													@click="selectEvent('start')" />
											</u-form-item>
									</template>
								</u-form>
							</view>
						</view>
					</view>
				</view>
				<view style="height: 90rpx"></view>
			</view>
			<view class="fBoxBtn">
				<view class="qx" @click="qxCancel">取消</view>
				<view class="qr" @click="submit">确认</view>
			</view>
		</view>

样式：

.pop_tSet {
		height: 100%;
	}

	.pop_Con {
		display: flex;
		flex-direction: column;
		height: 100%;
		overflow: hidden;

		.box_bb {
			display: flex;
			flex-direction: column;
			justify-content: space-between;

			.bb_title {
				text-align: center;
				font-size: 36rpx;
				font-weight: 700;
				padding: 50rpx 40rpx;
				border-bottom: 1rpx solid #F0F0F0;
			}
		}

		.box_bb_bot {
			flex: 1;
			overflow: hidden;
			display: flex;
			position: relative;

			.bnt_left {
				width: 260rpx;
				background-color: $uni-text-color-gap;
				height: 100%;
				overflow-y: scroll;
			}

			.bnt_right {
				flex: 1;
				height: 100%;
			}

			.btn_item {
				padding: 40rpx 0;
				font-size: 32rpx;
				text-align: center;
				transition: background-color .2s;
			}

			.btn_item_con {
				padding: 40rpx 30rpx;

				.text_s {
					font-size: 24rpx;
					color: $uni-text-color-grey;
					display: flex;
					align-items: center;
					justify-content: flex-end;
				}
			}

			.btn_active {
				background-color: $uni-bg-color-btn;
				color: #fff;
			}
		}

		.set_form {
			padding-left: 40rpx;
			margin-top: 80rpx;
		}
	}

	.fBoxBtn {
		width: 100%;
		padding: 0rpx 0rpx 0 0;
		display: flex;
		justify-content: space-between;
		border-top: 1rpx solid #F0F0F0;
		position: fixed;
		bottom: 0;
		z-index: 2;
		background-color: #fff;

		view {
			text-align: center;
			height: 90rpx;
			font-size: 30rpx;
			width: 50%;
			line-height: 90rpx;
		}

		.qx {
			border-right: 1rpx solid $uni-text-color-gap;
		}

		.qr {
			color: #0081FF;
		}
	}