标题栏

作者: 一路向前1 | 来源:发表于2017-09-21 20:50 被阅读0次

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#import "NewsViewController.h"#import "NewsDetailViewController.h"#import "NewsCollectionViewCell.h"#define BTN_W FIT_X(80) //标题的宽度//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 4.7#define  FIT_Y(y)  (SCR_H/667.*(y))    // 用于y轴适配@interface NewsViewController (){

NSArray *_allTitles ; //所有的新闻标题;

NSArray *_allDatas ; //所有的新闻数据 ;

NSArray *_tableDatas ; //给每一个网络单元格中的表格视图加载数据的数组 ;

}

@property(nonatomic,strong)NewsViewController *detailVC ;

@property(nonatomic,strong)UIScrollView *titleScrView; //标题滚动视图;

@property(nonatomic,strong)UILabel *titleIndicateLabel; //标题下方的指示标签.

@property(nonatomic,strong)UICollectionView *contentsColView; //新闻内容网络视图

@end

@implementation NewsViewController

#pragma maek - 详情控制器实例化

-(NewsViewController *)detailVC {

if (!_detailVC) {

_detailVC = [[NewsViewController alloc]init] ;

}

return _detailVC ;

}

//标题的滚动视图

-(UIScrollView *)titleScrView {

if (!_titleScrView) {

_titleScrView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 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.titleIndicateLabel];

return _titleScrView;

}

//标题指示标签

-(UILabel *)titleIndicateLabel {

if (!_titleIndicateLabel) {

_titleIndicateLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, FIT_Y(42), BTN_W,FIT_Y(2))];

_titleIndicateLabel.backgroundColor = [UIColor redColor] ;

}

return _titleIndicateLabel;

}

//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)) ;

//设置最小行间距为0

flow.minimumLineSpacing = 0 ;

//设置最小列间距为0

flow.minimumInteritemSpacing = 0 ;

//设置滚动方形为水平滚动

flow.scrollDirection  = UICollectionViewScrollDirectionHorizontal ;

//实例化网络视图

_contentsColView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, FIT_Y(44), SCR_W, SCR_H-FIT_Y(44)) collectionViewLayout:flow] ;

_contentsColView.tag  = 444;

_contentsColView.dataSource = self;

_contentsColView.delegate = self;

_contentsColView.pagingEnabled = YES;  //分页滚动效果

//注册一个cell

[_contentsColView registerClass:[NewsCollectionViewCell class] forCellWithReuseIdentifier:@"NewsCell"];

}

return _contentsColView;

}

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

//让下方内容视图跟着变化

[self.contentsColView scrollRectToVisible:CGRectMake((btn.tag-100)*SCR_W, 0, SCR_W, SCR_H-FIT_Y(44)) animated:YES];

//    //选中button变红

//    btn.selected = YES ;

//

//    [UIView animateWithDuration:0.185 animations:^{

//        //移动指示标签 ;

//        self.titleIndicateLabel.frame =CGRectMake((btn.tag-100)*BTN_W, FIT_Y(42), BTN_W, FIT_Y(2)) ;

//    }] ;

}

#pragma mark -UICollectionViewDataSource

-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {

//多少标题就有多少分区

return _allTitles.count ;

}

//单元格赋值

-(__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

static NSString *identifier = @"NewsCell" ;

NewsCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath] ;

if (cell == nil) {

cell = [[NewsCollectionViewCell alloc]initWithFrame:CGRectMake(0, 0, SCR_W, SCR_H - FIT_Y(44))];

}

cell.newsTables.dataSource = self ;

cell.newsTables.delegate = self;

return cell ;

}

#pragma -mark -UIcollectionViewDelegate

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

//如果内容视图滚动,则执行if中的代码

if (scrollView.tag == 444) {

int index = scrollView.contentOffset.x/SCR_W ;

//(1)改button

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 ;

}

}

//(2)改标签指示的位置

[UIView animateWithDuration:0.185 animations:^{

self.titleIndicateLabel.frame =CGRectMake(BTN_W *index, FIT_Y(42), BTN_W, FIT_Y(2));

}];

//(3)让标题滚动视图到指定位置

[self.titleScrView scrollRectToVisible:CGRectMake(BTN_W *index, 0, BTN_W, FIT_Y(44)) animated:YES] ;

}

}

//将要出现cell时回调的方法

- (void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath {

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

//(1)改变网格单元格中表格的视图的内容

_tableDatas = _allDatas[indexPath.row] ;

NewsCollectionViewCell *newsCell = (NewsCollectionViewCell *)cell ;

[newsCell.newsTables reloadData];

//    //让按钮变化

//    for (int i = 0; i <_allTitles.count; i++) {

//        UIButton *btn =[self.titleScrView viewWithTag:i+100];

//        btn.selected = NO ;

//        if (i == indexPath.row) {

//            btn.selected = YES ;

//        }

//    }

//    [UIView animateWithDuration:0.185 animations:^{

//        //移动指示标签 ;

//        self.titleIndicateLabel.frame =CGRectMake(indexPath.row*BTN_W, FIT_Y(42), BTN_W, FIT_Y(2)) ;

//    }] ;

//

//    //选中button变红,其他的变为normal 颜色

//    for (int i = 0; i < _allTitles.count;  i++) {

//        UIButton *button = (UIButton *)[self.titleScrView viewWithTag:i+100];

//        button.selected = NO ;

//    }

//(2)改变标题滚动视图的指示位置

//    [self.titleScrView scrollRectToVisible:CGRectMake(BTN_W *indexPath.row, 0, BTN_W, FIT_Y(44)) animated:YES] ;

//

}

#pragma -mark UITableViewDataSource

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

return _tableDatas.count ;

}

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

static NSString *idenfifier = @"cell";

UITableViewCell *cell  = [tableView dequeueReusableCellWithIdentifier:idenfifier];

if (cell == nil) {

cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:idenfifier];

}

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

return cell ;

}

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view.

_allTitles = @[@"头条",@"新闻",@"体育",@"游戏",@"科技",@"财经",@"家具",@"健康",@"军事",@"娱乐"];

_allDatas = @[@[@"墨西哥地震7.6级",@"🍎🍉",@"🍇🍑"],

@[@"魏永峙被🐖干死",@"🍎🍉",@"🍇🍑"],

@[@"跑步",@"游泳",@"跳高"],

@[@"王者荣耀",@"英雄联盟",@"🍇🍑"],

@[@"科技经贸",@"🍎🍉",@"🍇🍑"],

@[@"月薪100000",@"🍎🍉",@"🍇🍑"],

@[@"双人床",@"🍎🍉",@"🍇🍑"],

@[@"健康",@"🍎🍉",@"🍇🍑"],

@[@"ak-47",@"M16",@"暴力"],

@[@"谁结婚",@"🍎🍉",@"🍇🍑"]];

//用来接收真实的网络数据

_tableDatas = _allDatas [0] ;

UIView *view = [[UIView alloc]init];

view.backgroundColor = [UIColor whiteColor];

[self.view addSubview:view];

[self.view addSubview:self.titleScrView];

[self.view addSubview:self.contentsColView] ;

}

@end





-(instancetype)initWithFrame:(CGRect)frame {

self = [super initWithFrame:frame] ;

if (self) {

self.newsTables = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, SCR_W, SCR_H-FIT_Y(44)) style:UITableViewStylePlain];

[self.contentView addSubview:self.newsTables] ;

}

return self;

}

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