IOS 仿頭條佈局

pch檔案

螢幕快照 2017-09-21 下午8.47.55.png

#ifndef my_pch
#define my_pch

// Include any system framework and library headers here that should be included in all compilation units.
// You will also need to set the Prefix Header build setting of one or more of your targets to reference this file.
//用於適配的巨集
#define  SCR_W  [UIScreen mainScreen].bounds.size.width    // 螢幕寬度
#define  SCR_H  [UIScreen mainScreen].bounds.size.height   // 螢幕高度

#define  FIT_X(x)  (SCR_W/375.*(x))     // 用於x軸適配
#define  FIT_Y(y)  (SCR_H/667.*(y))     // 用於y軸適配
#endif /* my_pch */

螢幕快照 2017-09-21 下午8.48.30.png

注:NewsCollectionViewCell 繼承於 UICollectionViewCell

AppDelegate.m

#import "ViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    ViewController *vc = [[ViewController alloc]init];
    
    UINavigationController *navVc = [[UINavigationController alloc]initWithRootViewController:vc];
    self.window.rootViewController = navVc;
    return YES;
}

ViewController.m

#import "ViewController.h"
#import "NewsCollectionViewCell.h"
#define BTN_W FIT_X(80) // 每個標題按鈕的寬度
@interface ViewController ()<UICollectionViewDelegate,UICollectionViewDataSource,UITableViewDelegate,UITableViewDataSource>
{
    NSArray *_allTitles; //所有的新聞標題
    NSArray *_allDatas; //說有的新聞資料
    NSArray *_tableDatas; //給每一個網格單元格中的表格檢視載入資料的陣列
    
}

@property (nonatomic,strong)UIScrollView *titleScrView;//標題滾動檢視
@property (nonatomic,strong)UILabel *titleIndicateLable; //標題下方的指示標籤
@property (nonatomic,strong)UICollectionView *contentsColView; //新聞內容網格檢視
@end

@implementation ViewController

#pragma mark - 懶載入控制元件

//標題滾動檢視
- (UIScrollView *)titleScrView
{
    if (!_titleScrView)
    {
        _titleScrView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, FIT_Y(64), SCR_W, FIT_Y(44))];
        _titleScrView.contentSize = CGSizeMake(BTN_W * _allTitles.count, FIT_Y(44));
        _titleScrView.showsHorizontalScrollIndicator = NO;
        
        for (int i = 0 ; i < _allTitles.count; i++)
        {
            UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
            btn.frame = CGRectMake(i*BTN_W, 0, BTN_W, FIT_Y(44));
            [btn setTitle:_allTitles[i] forState:UIControlStateNormal];
            [btn setTitle:_allTitles[i] forState:UIControlStateSelected];
            [btn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
            [btn setTitleColor:[UIColor redColor] forState:UIControlStateSelected];
            if (i == 0) {
                btn.selected = YES;
            }
            btn.tag = i+100;
            [btn addTarget:self action:@selector(titleBtnHandle:) forControlEvents:UIControlEventTouchUpInside];
            [_titleScrView addSubview:btn];
        }
        [_titleScrView addSubview:self.titleIndicateLable];
        
    }
    return _titleScrView;
}

//標題指示標籤
- (UILabel *)titleIndicateLable
{
    if (!_titleIndicateLable)
    {
        _titleIndicateLable = [[UILabel alloc]initWithFrame:CGRectMake(0, FIT_Y(44), BTN_W, FIT_Y(2))];
        _titleIndicateLable.backgroundColor = [UIColor redColor];
    }
    return _titleIndicateLable;
}
//新聞內容檢視
- (UICollectionView *)contentsColView
{
    if (!_contentsColView)
    {
        //例項化網格佈局物件
        UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc]init];
        //設定每個單元格大小
        flow.itemSize = CGSizeMake(SCR_W, SCR_H-FIT_Y(44));
        //設定最小行間距
        flow.minimumLineSpacing = 0;
        //設定最小列間距
        flow.minimumInteritemSpacing = 0;
        //設定滾動方向水平滾動
        flow.scrollDirection = UICollectionViewScrollDirectionHorizontal;
        
        
        //例項化網格檢視
        _contentsColView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, FIT_Y(110), SCR_W, SCR_H-FIT_Y(44)) collectionViewLayout:flow];
        _contentsColView.tag = 444;
        _contentsColView.dataSource = self;
        _contentsColView.delegate = self;
        _contentsColView.pagingEnabled = YES; //分頁滾動
        //註冊一個cell
        [_contentsColView registerClass:[NewsCollectionViewCell class] forCellWithReuseIdentifier:@"NewsCell"];
        
    }
    return _contentsColView;
}
//標題滾動button方法
- (void)titleBtnHandle:(UIButton *)btn
{
    
    //點選按鈕讓collection滾動
    [self.contentsColView scrollRectToVisible:CGRectMake((btn.tag-100)*SCR_W, 0, SCR_W, FIT_Y(44)) animated:YES];
}
#pragma mark - UICollectionViewDataSource
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return _allTitles.count;
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"NewsCell";
    NewsCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
    if (!cell)
    {
        cell = [[NewsCollectionViewCell alloc]initWithFrame:CGRectMake(0, 0, SCR_W, SCR_H-FIT_Y(44))];
    }
    cell.newsTable.dataSource = self;
    cell.newsTable.delegate = self;
    return cell;
}
#pragma mark - UICollectionViewDelegate
//將要出現cell時回撥的方法
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    //如果內容網格檢視滾動,執行if中的程式碼
    if (scrollView.tag == 444)
    {
        int index = scrollView.contentOffset.x / SCR_W;
        //其他的button變為normal顏色
        for (int i = 0; i < _allTitles.count ; i++)
        {
            UIButton *btn = (UIButton *)[self.titleScrView viewWithTag:i+100];
            btn.selected = NO;
            if (index == i)
            {
                btn.selected = YES;
            }
        }
        //移動指示標籤
        [UIView animateWithDuration:0.185 animations:^{
            
            self.titleIndicateLable.frame = CGRectMake(index * BTN_W, FIT_Y(42), BTN_W, FIT_Y(2));
            
        }];
        
        //讓標題滾動檢視滾動到指定位置
        [self.titleScrView scrollRectToVisible:CGRectMake(BTN_W*index, 0, BTN_W, FIT_Y(44)) animated:YES];
        
    }
}
//即將滾動出現cell時的回撥方法
-(void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"%ld",indexPath.row);
    //改變網格單元格中表格檢視的內容
    _tableDatas = _allDatas[indexPath.row];
    NewsCollectionViewCell *newsCell = (NewsCollectionViewCell *)cell;
    [newsCell.newsTable reloadData];
    
    
}
#pragma mark - UITableViewDataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return _tableDatas.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (!cell)
    {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
        
    }
    
    cell.textLabel.text = _tableDatas[indexPath.row];
    return cell;
}



- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor whiteColor];
    _allTitles = @[@"頭條",@"新聞",@"體育",@"科技",@"財經",@"軍事",@"娛樂",@"家居",@"健康",@"遊戲"];
    _allDatas = @[@[@"頭條1",@"頭條2",@"頭條3"],
                  @[@"新聞1",@"新聞2",@"新聞3"],
                  @[@"體育1",@"體育2",@"體育3"],
                  @[@"科技1",@"科技2",@"科技3"],
                  @[@"財經1",@"財經2",@"財經3"],
                  @[@"軍事1",@"軍事2",@"軍事3"],
                  @[@"娛樂1",@"娛樂2",@"娛樂3"],
                  @[@"家居1",@"家居2",@"家居3"],
                  @[@"健康1"],
                  @[@"Game1",@"Game2"]
                  ];
    
    _tableDatas = _allDatas[0];
    
    UIView *v  = [[UIView alloc]init];
    [self.view addSubview: v];
    
    [self.view addSubview:self.titleScrView];
    [self.view addSubview:self.contentsColView];
    
    
    
}



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

/*
 #pragma mark - Navigation
 
 // In a storyboard-based application, you will often want to do a little preparation before navigation
 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
 // Get the new view controller using [segue destinationViewController].
 // Pass the selected object to the new view controller.
 }
 */

@end

NewsCollectionViewCell.h

@interface NewsCollectionViewCell : UICollectionViewCell
@property (nonatomic,strong)UITableView *newsTable;
@end

NewsCollectionViewCell.m

#import "NewsCollectionViewCell.h"

@implementation NewsCollectionViewCell
#pragma Mark - 重寫
- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        self.newsTable = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, SCR_W, SCR_H-FIT_Y(44)) style:UITableViewStylePlain];
        [self.contentView addSubview:self.newsTable];
    }
    return self;
}

@end