_多个ScrollView关联

实现效果如下：

1、定义宏，在定义位置时候方便简洁

// 定义整个屏幕的宽、高的宏

#define S_Width [UIScreen mainScreen].bounds.size.width

#define S_Height [UIScreen mainScreen].bounds.size.height

2、创建需要用的滑动条和滚动视图，并进行互相关联

// 定义需要用的ScrollView和滑动条

@property(nonatomic,strong)UIView *lineView;

@property(nonatomic,strong)UIScrollView *bigScrollView;

//  创建按钮

-(void)createTopButton{

    NSArray *arr = @[@"第一页",@"第二页",@"第三页"];

    _lineView = [[UIView alloc]initWithFrame:CGRectMake(0, 64+50, S_Width / 3.0, 2)];

    _lineView.backgroundColor = [UIColor orangeColor];

    [self.view addSubview:_lineView];

    for(inti =0; i < arr.count; i++) {

        UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];

        btn.frame=CGRectMake(S_Width/3.0* i ,64,S_Width/3.0,50);

        [self.viewaddSubview:btn];

        [btnsetTitle:arr[i] forState:UIControlStateNormal];

        [btnaddTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];

        btn.tag=20+i;

        if(i ==0) {

            [btnsetTitleColor:[UIColor orangeColor] forState:UIControlStateNormal];

        }

    }

}

-(void)click:(UIButton*)btn{

    // btn的标题：

    for(inti =0; i <3; i++ ) {

        UIButton*newBtn = [self.viewviewWithTag:20+i];

        if(newBtn.tag== btn.tag) {

            [newBtnsetTitleColor:[UIColor orangeColor] forState:UIControlStateNormal];

        }else{

            [newBtnsetTitleColor:[UIColor blueColor] forState:UIControlStateNormal];

        }

    }

    // 条

    _lineView.frame=CGRectMake((btn.tag-20)*S_Width/3.0,64+50,S_Width/3.0,2);

    // ScrollView

    [_bigScrollView setContentOffset:CGPointMake((btn.tag - 20)*S_Width, 0)];

}

-(void)createScrollView{

    // 创建滚动视图

    UIScrollView*bigScrollView = [[UIScrollViewalloc]initWithFrame:CGRectMake(0,64+52,S_Width,S_Height-64-52)];

    _bigScrollView= bigScrollView;

    bigScrollView.backgroundColor= [UIColorwhiteColor];

    [self.viewaddSubview:bigScrollView];

    bigScrollView.delegate=self;

    bigScrollView.tag=10;

    bigScrollView.contentSize=CGSizeMake(S_Width*3,0);

    bigScrollView.pagingEnabled=YES;

}

-(void)scrollViewDidScroll:(UIScrollView*)scrollView{

    CGFloatview_x =(scrollView.contentOffset.x/S_Width);

    // 条：

    _lineView.frame=CGRectMake(view_x*S_Width/3.0,64+50,S_Width/3.0,2);

    for(inti =0; i <3; i++ ) {

        UIButton*newBtn = [self.viewviewWithTag:20+i];

        if(newBtn.tag  -20== view_x) {

            [newBtnsetTitleColor:[UIColor redColor] forState:UIControlStateNormal];

        }else{

            [newBtnsetTitleColor:[UIColor blueColor] forState:UIControlStateNormal];

        }

    }

}

-(void)createTableView{

    for(inti =0; i <3; i++) {

        UITableView *tableView = [[UITableView alloc]initWithFrame:CGRectMake(S_Width * i ,0, S_Width, _bigScrollView.bounds.size.height) style:UITableViewStylePlain];

        [tableViewregisterClass:[FirstTableViewCell class] forCellReuseIdentifier:@"FirstTableViewCell"];

        tableView.delegate=self;

        tableView.dataSource=self;

        [_bigScrollViewaddSubview:tableView];

    }

}

#pragma mark - UITableViewDataSource

-(NSInteger)numberOfSectionsInTableView:(UITableView*)tableView{

    return 1;

}

-(NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section{

    return 20;

}

-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath{

    FirstTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"FirstTableViewCell"];

    returncell;

}