pch文件
屏幕快照 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.
//用于适配的宏
#define SCR_W [UIScreen mainScreen].bounds.size.width // 屏幕宽度
#define SCR_H [UIScreen mainScreen].bounds.size.height // 屏幕高度
#define FIT_X(x) (SCR_W/375.*(x)) // 用于x轴适配
#define FIT_Y(y) (SCR_H/667.*(y)) // 用于y轴适配
#endif /* my_pch */
屏幕快照 2017-09-21 下午8.48.30.png
注:NewsCollectionViewCell 继承于 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) // 每个标题按钮的宽度
@interface ViewController ()<UICollectionViewDelegate,UICollectionViewDataSource,UITableViewDelegate,UITableViewDataSource>
{
NSArray *_allTitles; //所有的新闻标题
NSArray *_allDatas; //说有的新闻数据
NSArray *_tableDatas; //给每一个网格单元格中的表格视图加载数据的数组
}
@property (nonatomic,strong)UIScrollView *titleScrView;//标题滚动视图
@property (nonatomic,strong)UILabel *titleIndicateLable; //标题下方的指示标签
@property (nonatomic,strong)UICollectionView *contentsColView; //新闻内容网格视图
@end
@implementation ViewController
#pragma mark - 懒加载控件
//标题滚动视图
- (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;
}
//标题指示标签
- (UILabel *)titleIndicateLable
{
if (!_titleIndicateLable)
{
_titleIndicateLable = [[UILabel alloc]initWithFrame:CGRectMake(0, FIT_Y(44), BTN_W, FIT_Y(2))];
_titleIndicateLable.backgroundColor = [UIColor redColor];
}
return _titleIndicateLable;
}
//新闻内容视图
- (UICollectionView *)contentsColView
{
if (!_contentsColView)
{
//实例化网格布局对象
UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc]init];
//设置每个单元格大小
flow.itemSize = CGSizeMake(SCR_W, SCR_H-FIT_Y(44));
//设置最小行间距
flow.minimumLineSpacing = 0;
//设置最小列间距
flow.minimumInteritemSpacing = 0;
//设置滚动方向水平滚动
flow.scrollDirection = UICollectionViewScrollDirectionHorizontal;
//实例化网格视图
_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; //分页滚动
//注册一个cell
[_contentsColView registerClass:[NewsCollectionViewCell class] forCellWithReuseIdentifier:@"NewsCell"];
}
return _contentsColView;
}
//标题滚动button方法
- (void)titleBtnHandle:(UIButton *)btn
{
//点击按钮让collection滚动
[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
//将要出现cell时回调的方法
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
//如果内容网格视图滚动,执行if中的代码
if (scrollView.tag == 444)
{
int index = scrollView.contentOffset.x / SCR_W;
//其他的button变为normal颜色
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;
}
}
//移动指示标签
[UIView animateWithDuration:0.185 animations:^{
self.titleIndicateLable.frame = CGRectMake(index * BTN_W, FIT_Y(42), BTN_W, FIT_Y(2));
}];
//让标题滚动视图滚动到指定位置
[self.titleScrView scrollRectToVisible:CGRectMake(BTN_W*index, 0, BTN_W, FIT_Y(44)) animated:YES];
}
}
//即将滚动出现cell时的回调方法
-(void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"%ld",indexPath.row);
//改变网格单元格中表格视图的内容
_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 = @[@"头条",@"新闻",@"体育",@"科技",@"财经",@"军事",@"娱乐",@"家居",@"健康",@"游戏"];
_allDatas = @[@[@"头条1",@"头条2",@"头条3"],
@[@"新闻1",@"新闻2",@"新闻3"],
@[@"体育1",@"体育2",@"体育3"],
@[@"科技1",@"科技2",@"科技3"],
@[@"财经1",@"财经2",@"财经3"],
@[@"军事1",@"军事2",@"军事3"],
@[@"娱乐1",@"娱乐2",@"娱乐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 - 重写
- (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
