更换版本

packageA/pages/caresgz/selectCity/selectCity.js

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+var t;
+(t = getApp()),
+  Page({
+    data: {
+      winHeight: 0,
+      tHeight: 0,
+      bHeight: 0,
+      startPageY: 0,
+      scrollTop: 0,
+      two_none: "none",
+      hasback: "none",
+      prov_list: [],
+      city_list: [],
+    },
+    onLoad: function () {
+      var a = this;
+      wx.showLoading({ title: "请求中" }),
+        t.getdata("", "carcity").then((t) => {
+          var e = t.data;
+          console.log("回调数据汽车：", e),
+            (e = JSON.parse(e)),
+            a.setData({ prov_list: e.data });
+        });
+      var e = wx.getSystemInfoSync().windowHeight;
+      a.setData({ winHeight: e });
+    },
+    btn_pinpai: function (a) {
+      var e = this,
+        n = a.currentTarget.dataset.item;
+      wx.setStorageSync("carprov", n);
+      var o = { provinceId: n.id };
+      t.getdata(o, "carprovinceId").then((t) => {
+        var a = t.data;
+        console.log("回调数据汽车：", a),
+          (a = JSON.parse(a)),
+          e.setData({ two_none: "block", hasback: "block", city_list: a.data });
+      });
+    },
+    btn_sel_name: function (t) {
+      var a = t.currentTarget.dataset.item;
+      console.log(a),
+        wx.setStorageSync("carcity", a),
+        wx.navigateBack({ delta: 1 });
+    },
+    goback: function () {
+      "block" == this.data.three_none
+        ? this.setData({ three_none: "none" })
+        : "block" == this.data.two_none
+        ? this.setData({ two_none: "none", hasback: "none" })
+        : this.setData({ hasback: "none" });
+    },
+  });

packageA/pages/caresgz/selectCity/selectCity.json

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+ {
+   "usingComponents": {}
+ }

packageA/pages/caresgz/selectCity/selectCity.wxml

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+<view>
+    <scroll-view scrollY="true" style="height:{{winHeight}}px">
+        <view class="selection" wx:for="{{prov_list}}" wx:key="index">
+            <view bindtap="btn_pinpai" class="item_city" data-item="{{item}}"> {{item.name}} </view>
+        </view>
+    </scroll-view>
+    <scroll-view class="scoll_car_service" scrollY="true" style="height:{{car_type_hight}};display:{{two_none}}">
+        <view class="selection" wx:for="{{city_list}}" wx:key="index">
+            <label bindtap="btn_sel_name" class="tab2" data-item="{{item}}"> {{item.name}} </label>
+        </view>
+    </scroll-view>
+</view>
+<view bindtap="goback" class="goback" style="display:{{hasback}}">
+    <text class="arrow"></text>
+</view>

packageA/pages/caresgz/selectCity/selectCity.wxss

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+.searchLetter {
+  color: #666;
+  display: -webkit-flex;
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  justify-content: center;
+  position: fixed;
+  right: 0;
+  text-align: center;
+  width: 40px;
+  z-index: 1;
+}
+.tab2 {
+  height: 80rpx;
+  line-height: 80rpx;
+  width: 560rpx;
+}
+.tab2,
+.tab3 {
+  border-bottom: 1px solid #eaeaea;
+  color: #2a2a2a;
+  font-size: 30rpx;
+  padding-left: 30rpx;
+}
+.tab3 {
+  word-wrap: break-word;
+  display: block;
+  overflow: hidden;
+  padding-bottom: 20rpx;
+  padding-top: 20rpx;
+}
+.scoll_car_service {
+  left: 25%;
+  width: 75%;
+  z-index: 5;
+}
+.scoll_car_service,
+.scoll_vender_service {
+  background-color: #f5f5f5;
+  box-shadow: 0 0 3px 3px #999;
+  display: -webkit-flex;
+  display: flex;
+  height: 100%;
+  position: fixed;
+  top: 1px;
+}
+.scoll_vender_service {
+  left: 50%;
+  width: 50%;
+  z-index: 10;
+}
+.searchLetter view {
+  height: 70rpx;
+}
+.touchClass {
+  color: #a56e0a;
+  font-size: 28rpx;
+}
+.showSlectedLetter {
+  align-items: center;
+  background-color: rgba(0, 0, 0, 0.5);
+  border-radius: 10px;
+  color: #fff;
+  font-size: 26px;
+  height: 100px;
+  justify-content: center;
+  left: 50%;
+  margin: -50px;
+  position: fixed;
+  top: 50%;
+  width: 100px;
+  z-index: 1;
+}
+.selection,
+.showSlectedLetter {
+  display: -webkit-flex;
+  display: flex;
+}
+.selection {
+  flex-direction: column;
+  width: 100%;
+}
+.item_letter {
+  align-items: center;
+  background-color: #f8f8f8;
+  color: #896a0d;
+  display: -webkit-flex;
+  display: flex;
+  font-size: 26rpx;
+  height: 30px;
+  padding-left: 10px;
+}
+.item_city {
+  background-color: #f5f5f5;
+  border-bottom: 1px solid #eaeaea;
+  color: #2a2a2a;
+  font-size: 30rpx;
+  height: 34px;
+  line-height: 34px;
+  padding-left: 10px;
+}
+.car_img {
+  height: 80rpx;
+  width: 100rpx;
+}
+.goback {
+  border: 2rpx solid #aaa;
+  border-radius: 50%;
+  bottom: 60rpx;
+  height: 80rpx;
+  position: fixed;
+  right: 40rpx;
+  width: 80rpx;
+  z-index: 99;
+}
+.arrow {
+  border-bottom: 3px solid #999;
+  border-left: 3px solid #999;
+  display: block;
+  height: 14px;
+  margin: 24rpx 30rpx;
+  transform: rotate(45deg);
+  width: 14px;
+}