图示

思路

当派工单这个输入框获取到焦点后，弹出弹出层选择数据。

1、定义这个输入框

<view class="cu-form-group">
			<view class="title"><text class="text-red">*</text>派工单号: </view>
			<input type="text" v-model="DispatchTicketNumber" @focus="xuanzepgd" class="is-required"
				placeholder=" 请选择派工单号" />
			<uni-popup ref="popup">
                <div>
                 <ul>
                  <li v-for="(item,index) of DispatchTicketNumberList" :key="index"  @click="selectItem(item)">{{item.DocNo }}</li>
                 </ul>
                </div>
			 </uni-popup>
		</view>

2、当获取到焦点时，调用接口获取数据，这里参数我自己写死了

//派工单输入框获取焦点
			xuanzepgd() {
				console.log('输入框获取到了焦点')
				this.$refs['popup'].open(),
				//调用接口获取派工单号
			    uni.request({
			    	url: dtnApi,
			    	method: 'POST',
					header: {
						'Content-Type': 'application/json'
					},
			    	data: {
					      	context: {
					      		CultureName: "zh-CN",
					      		EntCode: "001",
					      		OrgCode: "MK",
					      		UserCode: "admin"
					      	},
						    inDTO: [
						    {
						      Work: '焊接',
						      Name: 'BP_11/2X6000MM_B80G23B01_HG',
						      Bm: '焊管一车间',
						      Mo: ''
						    }
						  ]
					    },			    	
					success: (res) => {
					          console.log("结果集");
					          console.log(res); //res是返回结果集
					          const DispatchTicketNumberList = res.data.d.map(item => ({
					            ...item,
					            selected: false, // 在这里添加一个 selected 属性，初始值为 false
					          }));
					          this.DispatchTicketNumberList = DispatchTicketNumberList;
					        },
					fail: (res) => {
						uni.showToast({
							title: res.errMsg,
							icon: 'none',
							duration: 2000,
						})
					},
			    })
			},

3、弹出框选择赋值给输入框

/弹出框赋值派工单号
			 selectItem(item) {
			      // 更新选中状态
			      this.DispatchTicketNumberList = this.DispatchTicketNumberList.map(i => {
			        i.selected = i.DocNo === item;
			        return i;
			      });
			      // 将所选值赋值给文本框
			      this.DispatchTicketNumber = item.DocNo;
				  console.log("所选值")
				  console.log(this.DispatchTicketNumber)
			      // 关闭弹窗
			      this.$refs['popup'].close();
			    },