视频链接 https://www.bilibili.com/video/BV1RYbsebEeq/?vd_source=e7d2e332761044754ad06e0f173a3431
把type换成text就不会出现这个问题
    

 <u-popup v-model="formShow" mode="center" width="687" height="972" isTransparent>
			<view class="form-pop">
				<view class="pop-main">
					<view class="pop-title">填写信息</view>
					<scroll-view scroll-y="" class="items">
						<view class="form-item">
							<input type="text" v-model="tongueForm.name" placeholder="请输入姓名"/>
						</view>
						<view class="form-item">
							<input type="number" v-model="tongueForm.age" placeholder="请输入年龄（岁）"/>
						</view>
						<view class="form-item">
							<input type="digit" v-model="tongueForm.height" placeholder="请输入身高（cm）"/>
						</view>
						<view class="form-item">
							<input type="digit" v-model="tongueForm.weight" placeholder="请输入体重（kg）"/>
						</view>
						<view class="form-item">
							<picker @change="pickerChange" range-key="label" :value="genderIndex" :range="array">
							    <view class="picker" :class="{'gray': genderIndex === null}">
									{{ genderIndex === null ? '请选择性别' : array[genderIndex].label }}
							    </view>
							  </picker>
						</view>
						<view class="form-item">
							<input type="number" v-model="tongueForm.mobile" placeholder="请输入手机号"/>
						</view>
					</scroll-view>
					<view class="confirm flex_btn" @click="formConfirm">继续</view>
				</view>
			</view>
		</u-popup>