二级tableView联动

原文出处： 大墙66370   

我这里说的联动的意思就是操作AtableView 让BtableView滚动到相应的位置,操作BtableView让AtableView滚动到相应的位置.

先给个参考图看一下好说.

首先介绍一下这个结构.
首先左边的tableView是一个控制 leftViewController
右边的是一个控制器rightViewController
右边控制器rightViewController的rightTableView加到了左边 控制器的View上了(用到了addChildViewController)

在左边的控制器创建右边控制器 这就拿到了 右边控制器的 引用 在右边控制器中写个 方法 点击左边 用右边的 引用直接调用 方法移动 就好了

移动右边 让左边移动,在右控制器边同样的拿到左边的 引用吧 ,用代理…..

还是看代码吧
ViewController不重要只是加一个导航
ViewController.h

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#import

@interface ViewController :    UIViewController

@end

ViewController.m

Objective-C

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#import "ViewController.h"

#import "leftViewController.h"

@interfaceViewController()

@end

 

@implementationViewController

 

-(void)viewDidLoad{

[superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

self.view.backgroundColor=[UIColorwhiteColor];

 

UIButton*bution=[[UIButtonalloc]initWithFrame:CGRectMake(0,0,100,50)];

bution.center=self.view.center;

bution.backgroundColor=[UIColorredColor];

[bution addTarget:self action:@selector(butionCleck:) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:bution];

}

 

-(void)butionCleck:(UIButton*)sender{

leftViewController*leftVC=[leftViewControllernew];

[self.navigationController pushViewController:leftVC animated:YES];

}

-(void)didReceiveMemoryWarning{

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end

leftViewController.h

Objective-C

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#import

@interface leftViewController :     UIViewController

@end

leftViewController.m

Objective-C

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#import "leftViewController.h"

#import "rightViewController.h"

 

@interfaceleftViewController()

@property(nonatomic,strong)UITableView*leftTableView;

@property(nonatomic,strong)NSArray*leftDataArr;

@property(nonatomic,strong)rightViewController*rightVC;

@end

 

@implementationleftViewController

 

-(void)viewDidLoad{

[superviewDidLoad];

// Do any additional setup after loading the view.

self.view.backgroundColor=[UIColorwhiteColor];

 

[self.view addSubview:self.leftTableView];

[selfcreatRightVC];

}

 

-(void)creatRightVC{

self.rightVC=[rightViewControllernew];

 

self.rightVC.delegate=self;

[self addChildViewController:_rightVC];

[self.view addSubview:_rightVC.view];

}

 

 

 

-(UITableView*)leftTableView{

if(!_leftTableView){

    _leftTableView=[[UITableViewalloc]initWithFrame:CGRectMake(0,0,120,self.view.frame.size.height) style:UITableViewStylePlain];

    _leftTableView.showsVerticalScrollIndicator=NO;

    _leftTableView.delegate=self;

    _leftTableView.dataSource=self;

    [_leftTableView registerClass:[UITableViewCellclass] forCellReuseIdentifier:@"cell11"];

}

return_leftTableView;

}

 

-(NSArray*)leftDataArr{

if(!_leftDataArr){

    _leftDataArr=@[@"第一类",

                    @"第二类",

                    @"第三类",

                    @"第四类",

                    @"第五类",

                    @"第六类",

                    @"第七类",

                    @"第八类",

                    @"第九类",

                    @"第十类",

                    @"第十一类",

                    @"第十二类",

                    @"第十三类",

                    @"第十四类",

                    @"第十五类",

                    @"第十六类",

                    @"第十七类",

                    @"第十八类",

                    @"第十九类",

                    @"第二十类",

                    @"第二十一类"

                    ];

}

return_leftDataArr;

}

 

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

return1;

}

 

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

returnself.leftDataArr.count;

}

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

UITableViewCell*cell=[tableView dequeueReusableCellWithIdentifier:@"cell11" forIndexPath:indexPath];

cell.textLabel.text=self.leftDataArr[indexPath.row];

returncell;

}

 

-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{

 

NSLog(@"-----%ld",indexPath.row);

if(self.rightVC){

 

    [self.rightVC scrollToSelectIndexPath:indexPath];

}

}

 

/*

代理右边选择时执行代理.

*/

-(void)rightViewControllerDelegate:(rightViewController*)vc withIndexPatch:(NSIndexPath*)ptch{

[self.leftTableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:ptch.section inSection:0] animated:YES scrollPosition:UITableViewScrollPositionMiddle];

}

 

 

-(void)rightViewControllerDelegateHeaderViewAppear:(rightViewController*)vc withIndexPatch:(NSInteger)section{

[self.leftTableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:section inSection:0] animated:YES scrollPosition:UITableViewScrollPositionMiddle];

}

 

-(void)rightViewControllerDelegateHeaderViewdisappear:(rightViewController*)vc withIndexPatch:(NSInteger)section{

 

[self.leftTableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:section inSection:0] animated:YES scrollPosition:UITableViewScrollPositionMiddle];

}

 

 

-(void)didReceiveMemoryWarning{

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

 

@end

rightViewController.h

Objective-C

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#import

@class rightViewController;

@protocol rightViewControllerDeldgate

-(void)rightViewControllerDelegate:(rightViewController *)vc withIndexPatch:(NSIndexPath *)ptch;

-(void)rightViewControllerDelegateHeaderViewAppear:(rightViewController *)vc withIndexPatch:(NSInteger )section;

-(void)rightViewControllerDelegateHeaderViewdisappear:(rightViewController *)vc withIndexPatch:(NSInteger )section;

@end

 

 

@interface rightViewController : UIViewController

 

@property(nonatomic,weak)id  delegate;

 

-(void)scrollToSelectIndexPath:(NSIndexPath *)path;

@end

rightViewController.m

Objective-C

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#import "rightViewController.h"

 

@interfacerightViewController()

@property(nonatomic,strong)UITableView*rightTableView;

@property(nonatomic,strong)NSArray*rightDataArr;

@property(nonatomic,assign)BOOLisScrollUp;

@property(nonatomic,assign)CGFloatlastOffsetY;//滚动即将结束时scrollView的偏移量

@property(nonatomic,assign)BOOLifScroll;//当左边cell点击-> 右边滑动-> 右边滑动头消失头出现就会执行代理->代理方法再让左边滑动      给个boll值设置为NO就是为了 点击左边cell右边头出现或者消失 都不执行代理方法 左边也不会滑动.

@end

 

@implementationrightViewController

 

-(UITableView*)rightTableView{

if(!_rightTableView){

    _rightTableView=[[UITableViewalloc]initWithFrame:CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height) style:UITableViewStylePlain];

    _rightTableView.showsVerticalScrollIndicator=NO;

    _rightTableView.delegate=self;

    _rightTableView.dataSource=self;

    [_rightTableView registerClass:[UITableViewCellclass] forCellReuseIdentifier:@"cell"];

    [_rightTableView registerClass:[UITableViewHeaderFooterViewclass] forHeaderFooterViewReuseIdentifier:@"headerView"];

}

return_rightTableView;

}

 

-(NSArray*)rightDataArr{

if(!_rightDataArr){

    _rightDataArr=

@[

  @[@"1橘子",@"西瓜",@"哈密瓜",@"苹     果",@"柚子",@"香蕉"],

@[@"2华为手机",@"苹果5",@"苹果5s",@"苹果6",@"苹果6+",@"苹果6s",@"苹果6s+"],

@[@"3联想电脑",@"华硕电脑",@"MAC"],

@[@"4鸡肉",@"鸭肉",@"牛肉",@"猪肉",@"羊肉"],

@[@"5香菇",@"蘑菇",@"大头菜",@"青椒"],

@[@"6花生油",@"大豆油",@"葵花籽油",@"芝   麻香油"],

@[@"7花椒",@"陈皮",@"八角"],

@[@"8橘子",@"西瓜",@"哈密瓜",@"苹果",@"柚子",@"香蕉"],

@[@"9华为手机",@"苹果5",@"苹果5s",@"苹果6",@"苹果6+",@"苹果6s",@"苹果6s+"],

@[@"10联想电脑",@"华硕电脑",@"MAC"],

@[@"11鸡肉",@"鸭肉",@"牛肉",@"猪肉",@"羊肉"],

@[@"12香菇",@"蘑菇",@"大头菜",@"青椒"],

@[@"13花生油",@"大豆油",@"葵花籽油",@"芝麻香油"],

@[@"14花椒",@"陈皮",@"八角"],

@[@"15橘子",@"西瓜",@"哈密瓜",@"苹果",@"柚子",@"香蕉"],

@[@"16华为手机",@"苹果5",@"苹果5s",@"苹果6",@"苹果6+",@"苹果6s",@"苹果6s+"],

@[@"17联想电脑",@"华硕电脑",@"MAC"],

@[@"18鸡肉",@"鸭肉",@"牛肉",@"猪肉",@"羊肉"],

@[@"19香菇",@"蘑菇",@"大头菜",@"青椒"],

@[@"20花生油",@"大豆油",@"葵花籽油",@"芝麻香油"],

@[@"21花椒",@"陈皮",@"八角"]

];

}

return_rightDataArr;

}

 

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

returnself.rightDataArr.count;

}

 

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

 

NSArray*arr=self.rightDataArr[section];

returnarr.count;

}

 

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

UITableViewCell*cell=[tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];

NSArray*data=self.rightDataArr[indexPath.section];

 

cell.textLabel.text=data[indexPath.row];

returncell;

}

 

-(nullableUIView*)tableView:(UITableView*)tableView viewForHeaderInSection:(NSInteger)section{

UITableViewHeaderFooterView*headerView=[tableView dequeueReusableHeaderFooterViewWithIdentifier:@"headerView"];

 

headerView.textLabel.text=[NSString stringWithFormat:@"第%ld区",section+1];

returnheaderView;

}

 

 

-(CGFloat)tableView:(UITableView*)tableView heightForHeaderInSection:(NSInteger)section{

return30;

}

 

 

-(void)viewDidLoad{

[superviewDidLoad];

 

self.view.frame=CGRectMake(120,64,self.view.frame.size.width-120,self.view.frame.size.height-64);

self.view.backgroundColor=[UIColorredColor];

[self.view addSubview:self.rightTableView];

 

}

-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{

if(_delegate&&[_delegate respondsToSelector:@selector(rightViewControllerDelegate:withIndexPatch:)]){

    [_delegate rightViewControllerDelegate:self withIndexPatch:indexPath];

}

}

 

//头将出现

-(void)tableView:(UITableView*)tableView willDisplayHeaderView:(UIView*)view forSection:(NSInteger)section{

if(_delegate&&[self.delegate respondsToSelector:@selector(rightViewControllerDelegateHeaderViewAppear:withIndexPatch:)]&&!_isScrollUp&&_ifScroll){

    [_delegate rightViewControllerDelegateHeaderViewAppear:self withIndexPatch:section];

}

}

//头讲消失

-(void)tableView:(UITableView*)tableView didEndDisplayingHeaderView:(UIView*)view forSection:(NSInteger)section{

 

if(_delegate&&[self.delegate respondsToSelector:@selector(rightViewControllerDelegateHeaderViewdisappear:withIndexPatch:)]&&_isScrollUp&&_ifScroll){

    //上滑才执行

    [_delegate rightViewControllerDelegateHeaderViewdisappear:self withIndexPatch:section+1];

}

}

 

//主要判断向上滑动还是向下滑动

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

_isScrollUp=_lastOffsetY

这篇是我看例子http://www.jianshu.com/p/c118a29887ca

由于有点小问题就是 (慢慢拖着拖着不放)滑动右边 左边的联动有时不会出现

首先考虑一个问题
当我们 操作左边tableView的时候 让右边动.
我们动右边的时候 让左边动.
比如说 我操作左边 右边动了 (右边一动左边是不是受到影响呢?)

分析一下我们 想要的结果是
我操作左边 让右边东(这个时候不想让左边受影响)
我拖动右边时才让左边受影响.
那么我们只需 判断出 右边的动 是我操作左边他才动的 还是我直接拖动右边才动的.

所有的解释都在 代码注释里.

效果图如图