项目中用到的UIScrollView与UICollectionView的联动，核心代码会标注出来
头文件

#import "BaseViewController.h"

@interface RoomViewController : UIViewController

@end

实现文件:

#import "RoomViewController.h"
#import "ScanQRCodeViewController.h"
#import "XmyyInterfaceManager.h"
#import "OpenHABWidget.h"
#import "ManageRoomsViewController.h"

#import "VoiceView.h"
#import "HelpViewController.h"
#import "OpenHABVoiceControlManager.h"
#import <AFNetworking/AFNetworking.h>
#import <AVFoundation/AVFoundation.h>

#import "Masonry.h"
#import "OpenHABRoomSelectView.h"
#import "OpenHABMainRoomService.h"
#import "RoomAreaCollectionViewCell.h"

#import "OpenHABMainRoomService.h"

@interface RoomViewController ()<UICollectionViewDelegate,UICollectionViewDataSource>
{
    NSInteger currentIndex;
}
@property (nonatomic,strong) UIView *buttonAnimationView;
@property (nonatomic,strong) NSMutableArray<NSMutableArray *> *roomList;
@property (nonatomic,strong) NSMutableArray<OpenHABWidget *> *floorWidgetList;

// 楼层信息
@property (strong, nonatomic)  UIScrollView *floorScrollView;

@property (strong, nonatomic)  UICollectionView *collectionView;

@property (weak, nonatomic) IBOutlet UIButton *micBtn;

@property (nonatomic,assign) BOOL isScrollLabel;

#pragma mark - 新增
@property (nonatomic, strong) OpenHABMainRoomService *mainRoomService;

// 楼层数组
@property (nonatomic, strong) NSArray *floorArrs;

@end

@implementation RoomViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self setUpUI];
}

#pragma mark - dataSource
- (NSArray *)floorArrs
{
    return _floorArrs = [self.mainRoomService getAllFloorArrs];
}

-(OpenHABMainRoomService *)mainRoomService
{
    if (!_mainRoomService)
    {
        _mainRoomService  = [OpenHABMainRoomService sharedOpenHABMainRoomService];
    }
    return _mainRoomService;
}

#pragma mark UI
- (void)setUpUI
{
    [self.view addSubview:self.floorScrollView];
    [self.view addSubview:self.collectionView];
    
    [self layOutScrollView];
    
    [self addSelectViews];
}


#pragma mark - 初始化ScrollView
-(UICollectionView *)collectionView
{
    if (!_collectionView)
    {
        UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
        
        layout.headerReferenceSize = CGSizeMake(self.view.frame.size.width, 1.0f);
        layout.itemSize = CGSizeMake(roomIconSize.width ,roomIconSize.height);
        layout.scrollDirection = UICollectionViewScrollDirectionVertical;
        layout.minimumLineSpacing = 10 * 2;
        layout.sectionInset = UIEdgeInsetsMake(10.0f, 10.0f, 10.0f, 10.0f);
        
        _collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 25.0f, self.view.frame.size.width, self.view.frame.size.height - 64.0f - 44.0f) collectionViewLayout:layout];
        _collectionView.delegate = self;
        _collectionView.dataSource = self;
        _collectionView.backgroundColor = [UIColor clearColor];
        [_collectionView registerClass:[RoomAreaCollectionViewCell class]
            forCellWithReuseIdentifier:RoomAreaIdentify];
        [_collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"UID"];
        
    }
    return _collectionView;
}

- (UIScrollView *)floorScrollView
{
    if (!_floorScrollView)
    {
        _floorScrollView = [[UIScrollView alloc] init];
        _floorScrollView.contentSize = CGSizeMake(kScreenWidth * 0.25f * [self.mainRoomService getAllFloorArrs].count, 44.0f);
        _floorScrollView.showsHorizontalScrollIndicator = NO;
    }
    return _floorScrollView;
}

- (void)layOutScrollView
{
    [self.floorScrollView makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view.mas_top).offset(64.0f);
        make.left.equalTo(self.view.mas_left);
        make.size.mas_equalTo(CGSizeMake(kScreenWidth, 44.0f));
    }];
    
    [self.collectionView makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.floorScrollView.mas_bottom);
        make.left.equalTo(self.view.mas_left);
        make.size.mas_equalTo(CGSizeMake(self.view.frame.size.width, self.view.frame.size.height - 64.0f - 44.0f - 40.0f));
    }];
}

- (void)addSelectViews
{
    // 当前的所在的选项卡
    currentIndex = 0;
    self.isScrollLabel = YES;

    OpenHABMainRoomService *indexRoomService = [OpenHABMainRoomService sharedOpenHABMainRoomService];
    
    NSArray *floorArr = [indexRoomService getAllFloorArrs];
    if (floorArr.count != 0)
    {
        for (int i = 0; i < floorArr.count; i++)
        {
            OpenHABRoomSelectView *selectTabView = [[OpenHABRoomSelectView alloc] initWithFrame:CGRectMake(kScreenWidth/4.0f * i, 0, kScreenWidth/4.0f, 44.0f)];
            if (i == 0)
            {
                selectTabView.underLineView.backgroundColor = [UIColor colorWithHexString:@"#696BFF"];
            }
            
            OpenHABWidget *floorObj = floorArr[i];
            
            [selectTabView.selectBtn setTitle:floorObj.label
                                     forState:UIControlStateNormal];
            selectTabView.selectBtn.tag = i;
            [selectTabView.selectBtn addTarget:self
                                        action:@selector(floorBtnClick:)
                              forControlEvents:UIControlEventTouchUpInside];
            [self.floorScrollView addSubview:selectTabView];
        }
    }
}


#pragma mark - CollectionView的代理
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return self.floorArrs.count;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return [self.mainRoomService getRoomsByFloor:section].count;
}

- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    RoomAreaCollectionViewCell *cell = [_collectionView dequeueReusableCellWithReuseIdentifier:RoomAreaIdentify
                                                                            forIndexPath:indexPath];
    OpenHABWidget *detail = [self.mainRoomService getRoomInfoByFloor:indexPath.section roomIndex:indexPath.row];
    
    cell.roomIcon.image = [UIImage imageNamed:@"ic_dining_room"];
    cell.roomLable.text = detail.label;
    
    return cell;
}

-(UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
    
    UICollectionReusableView* reusableView;
    
    if (kind == UICollectionElementKindSectionHeader) {
        reusableView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"UID" forIndexPath:indexPath];
    }
    
    UIView *bgView = [[UIView alloc] init];
    bgView.backgroundColor = [UIColor colorWithHexString:@"#EEEEEE"];
    [reusableView addSubview:bgView];
    [bgView makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(reusableView.mas_left).offset(24.0f);
        make.right.equalTo(reusableView.mas_right).offset(-24.0f);
        make.size.mas_equalTo(CGSizeMake(self.view.frame.size.width - 48.0f, 1.0f));
    }];
    
    reusableView.backgroundColor=[UIColor clearColor];
    
    return reusableView;
}

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

#pragma mark - floorBtnAction 点击标签滑动collectionview和collectionview滑动标签随动

// 正向定位，通过点击的区域确定需要滚动到的位置
- (void)floorBtnClick:(UIButton *)btn
{
    // 选中点击的按钮
    for (UIView *view in self.floorScrollView.subviews) {
        if ([view isKindOfClass:[OpenHABRoomSelectView class]])
        {
            OpenHABRoomSelectView *selectTabView  = (OpenHABRoomSelectView *)view;
            
            if (btn.tag != selectTabView.selectBtn.tag)
            {
                selectTabView.underLineView.backgroundColor = [UIColor clearColor];
            }
            else
            {
                selectTabView.underLineView.backgroundColor = [UIColor colorWithHexString:@"#696BFF"];
            }
        }
    }
    
    NSLog(@"btn.tag===>%ld",(long)btn.tag);
    
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:btn.tag];
    [self.collectionView scrollToItemAtIndexPath:indexPath
                                atScrollPosition:UICollectionViewScrollPositionTop
                                        animated:YES];
}

// 通过滚动定位滑块的位置(核心代码，反向定位)
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
    if (scrollView == self.collectionView) {
        
        CGRect visibleRect =  (CGRect){.origin = self.collectionView.contentOffset, .size = self.collectionView.bounds.size};
        CGPoint visiblePoint = CGPointMake(CGRectGetMidX(visibleRect), CGRectGetMinY(visibleRect));
        NSIndexPath *visibleIndexPath = [self.collectionView indexPathForItemAtPoint:visiblePoint];
        
        if (currentIndex == visibleIndexPath.section ||visibleIndexPath == nil)
        {
            return;
        }
        
        currentIndex = visibleIndexPath.section;
        
        if (self.isScrollLabel)
        {
            for (id tempView in self.floorScrollView.subviews) {
                if ([tempView isKindOfClass:[OpenHABRoomSelectView class]]) {
                    OpenHABRoomSelectView *tempRoomView = (OpenHABRoomSelectView *)tempView;
                    if (currentIndex != tempRoomView.selectBtn.tag)
                    {
                        tempRoomView.underLineView.backgroundColor = [UIColor clearColor];
                    }
                    else
                    {
                        tempRoomView.underLineView.backgroundColor = [UIColor colorWithHexString:@"#696BFF"];
                    }
                }
            }
        }
    }
}

-(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
    self.isScrollLabel = YES;
}

#pragma mark - lazy
-(NSMutableArray *)roomList{
    if (!_roomList) {
        _roomList = [NSMutableArray array];
    }
    return _roomList;
}

-(UIView *)buttonAnimationView{
    if (!_buttonAnimationView) {
        _buttonAnimationView = [[UIView alloc]init];
        _buttonAnimationView.backgroundColor = [UIColor colorWithWholeRed:54 green:166 blue:255];
        _buttonAnimationView.pmHeight = 3;
        _buttonAnimationView.layer.masksToBounds = YES;
        _buttonAnimationView.layer.cornerRadius = 1.5f;
    }
    return _buttonAnimationView;
}

#pragma mark -
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
@end