參考：github項(xiàng)目地址

我這邊是的App的首頁(yè)是PageView里加了5個(gè)頁(yè)面，其中有一個(gè)頁(yè)面是包含了TabBarView。在滾動(dòng)的過(guò)程中，當(dāng)TabBarView滾動(dòng)到最后一頁(yè)或者第一頁(yè)面的時(shí)候，不能和PageView進(jìn)行聯(lián)動(dòng)。所以查詢了很多種方式，覺(jué)的上面作者實(shí)現(xiàn)的方式很不錯(cuò)。代碼量不多。

1.創(chuàng)建一個(gè)PageViewScrollUtils助手類，當(dāng)監(jiān)聽(tīng)的需要的時(shí)機(jī)，進(jìn)行相應(yīng)的操作

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

class PageViewScrollUtils {
  final PageController pageController;
  final TabController tabController;
  PageViewScrollUtils({required this.pageController, required this.tabController});

  Drag? _drag;

  bool handleNotification(ScrollNotification notification) {
    if (notification is UserScrollNotification) {
      if ((notification.direction == ScrollDirection.reverse && tabController.index == tabController.length - 1) || (notification.direction == ScrollDirection.forward && tabController.index ==  0)) {
        _drag = pageController.position.drag(DragStartDetails(), () {
          _drag = null;
        });
      }
    }
    if (notification is OverscrollNotification) {
      if (notification.dragDetails != null && _drag != null) {
        _drag!.update(notification.dragDetails!);
      }
    }
    if (notification is ScrollEndNotification) {
      if (notification.dragDetails != null && _drag != null) {
        _drag!.end(notification.dragDetails!);
      }
    }
    return true;
  }
}

2.在TabBarView所在的頁(yè)面實(shí)例化PageViewScrollUtils,實(shí)例化的時(shí)候需要TabBarView與PageView的controller

_pageViewScrollUtils = PageViewScrollUtils(pageController: widget.pageController,tabController: _tabController);

3.在TabBarView 外邊套一個(gè)NotificationListener，監(jiān)聽(tīng)TabBarView滾動(dòng)，并使用PageViewScrollUtils進(jìn)行處理

NotificationListener<ScrollNotification>(
                    child: TabBarView(
                          physics: ClampingScrollPhysics(),
                          controller: _tabController,
                          children: [
                            LobbyLayout(),
                            LobbyLayout(),
                            LobbyLayout(),
                            LobbyLayout()
                          ]
                      ),
                      onNotification: _pageViewScrollUtils.handleNotification,
                    )

4.這樣就可以了。非常簡(jiǎn)單，代碼量也很少。

點(diǎn)擊下方贊賞，給作者一點(diǎn)鼓勵(lì)！