网易新闻首页iOS

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//

//  ViewController.m

//  wyy

//

 

//  Copyright © 2016 zm. All rights reserved.

//

 

#import "ViewController.h"

#import "ZMViewController.h"

#import "ZMLabel.h"

@interface ViewController ()<UIScrollViewDelegate>

@property (weak, nonatomic) IBOutlet UIScrollView *titleScrllView;

@property (weak, nonatomic) IBOutlet UIScrollView *contentScrollview;

 

@end

 

@implementation ViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

   self.automaticallyAdjustsScrollViewInsets = NO;

    self.title = @"网易新闻";

    

    [self setUpChildVC];

    [self setUpTitle];

    //默认选中第一页  调用此方法

    [self scrollViewDidEndScrollingAnimation:self.contentScrollview];

    

}

//创建头部标题视图

- (void)setUpTitle{

    CGFloat w = 100;

    CGFloat y = 0;

    CGFloat h = self.titleScrllView.frame.size.height;

    for (int i = 0; i < 7; i++) {

        ZMLabel *lable = [[ZMLabel alloc]initWithFrame:CGRectMake(i*w, y, w, h)];

        

        lable.text = [self.childViewControllers[i] title];

       

        //lable添加手势

        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];

        [lable addGestureRecognizer:tap];

 

        [self.titleScrllView addSubview:lable];

 

    }

    self.titleScrllView.contentSize = CGSizeMake(7*w, 0);

    self.contentScrollview.contentSize = CGSizeMake(7*[UIScreen mainScreen].bounds.size.width, 0);

    

    

 

}

 

- (void)tap:(UITapGestureRecognizer *)tap{

   

    NSInteger index = [self.titleScrllView.subviews indexOfObject:tap.view];

    

    

    

    //通过手势设置内容滚动视图的偏移量

    

    [self.contentScrollview setContentOffset:CGPointMake([UIScreen mainScreen].bounds.size.width * index, 0) animated:YES];

    

    

    

}

//当动画结束时调用此方法

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

    

    CGFloat w = scrollView.frame.size.width;

    

    CGFloat h = scrollView.frame.size.height;

    

    CGFloat offsetX = scrollView.contentOffset.x;

    

    NSInteger index = offsetX/w;

    

    

    ZMLabel *lab = self.titleScrllView.subviews[index];

    CGFloat offsetx = lab.center.x - scrollView.frame.size.width*0.5;

    //判断offsetx最大最小值两种情况

    if (offsetx < 0) {

        offsetx = 0;

    }

    if (offsetx > (self.titleScrllView.contentSize.width - scrollView.frame.size.width)) {

        offsetx = self.titleScrllView.contentSize.width - scrollView.frame.size.width;

    }

    

    

    

    self.titleScrllView.contentOffset = CGPointMake(offsetx, 0);

 

    UIViewController *zm = self.childViewControllers[index];

     if ([zm isViewLoaded]) return;

    

    

    zm.view.frame = CGRectMake(index *w, 0, w, h);

   

  

    

    [self.contentScrollview addSubview:zm.view];

    

}

 

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

    

    [self scrollViewDidEndScrollingAnimation:scrollView];

}

 

 

 

- (void)setUpChildVC{

    ZMViewController *zm = [[ZMViewController alloc]init];

    zm.title = @"新闻";

    [self addChildViewController:zm];

    

    ZMViewController *zm1 = [[ZMViewController alloc]init];

    zm1.title = @"军事";

    [self addChildViewController:zm1];

    

    ZMViewController *zm2 = [[ZMViewController alloc]init];

    zm2.title = @"政治";

    [self addChildViewController:zm2];

    

    ZMViewController *zm3 = [[ZMViewController alloc]init];

    zm3.title = @"娱乐";

    [self addChildViewController:zm3];

    

    ZMViewController *zm4 = [[ZMViewController alloc]init];

    zm4.title = @"社会";

    [self addChildViewController:zm4];

    

    

    ZMViewController *zm5 = [[ZMViewController alloc]init];

    zm5.title = @"科技";

    [self addChildViewController:zm5];

    

    

    ZMViewController *zm6 = [[ZMViewController alloc]init];

    zm6.title = @"啦啦";

    [self addChildViewController:zm6];

    

    

}

 

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

    

    CGFloat scale = scrollView.contentOffset.x/scrollView.frame.size.width;

    

    NSInteger leftIndex = scale;

    

    NSInteger rightIndex = scale+1;

    

    if (scale < 0 || scale > self.titleScrllView.subviews.count-1) return;

   

    CGFloat rightScale = scale - leftIndex;

    CGFloat leftScale = 1-rightScale;

    ZMLabel *leftLabel = self.titleScrllView.subviews[leftIndex];

    

    ZMLabel *rightLabel = (rightIndex == self.titleScrllView.subviews.count)?nil:(self.titleScrllView.subviews[rightIndex]);

    

    leftLabel.scale = leftScale;

    rightLabel.scale = rightScale;

    

 

    

}

 

 

 

 

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

 

@end

// 自定义一个lable 继承于uilable

//

//  ZMLabel.m

//  wyy

//

 

//  Copyright © 2016 zm. All rights reserved.

//

 

#import "ZMLabel.h"

 

@implementation ZMLabel

 

- (instancetype)initWithFrame:(CGRect)frame{

    if (self =[super initWithFrame:frame]) {

        

        

        self.textAlignment = NSTextAlignmentCenter;

        self.userInteractionEnabled = YES;

        

        self.textColor = [UIColor blackColor];

        

        self.font = [UIFont systemFontOfSize:15];

        

        

    }

    return self;

    

}

 

 

- (void)setScale:(CGFloat)scale{

    

    CGFloat transform = scale*0.3+1;

    

    self.transform = CGAffineTransformMakeScale(transform, transform);

    

    self.textColor = [UIColor colorWithRed:transform-1 green:0 blue:0 alpha:1];

    

    

}

 

 

@end

//创建控制器   这里可以为了简易就只创建一个控制器

//

//  ZMViewController.m

//  wyy

//

 

//  Copyright © 2016 zm. All rights reserved.

//

 

#import "ZMViewController.h"

 

@interface ZMViewController ()

 

@end

 

@implementation ZMViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

    

    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"cell"];

}

 

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

 

#pragma mark - Table view data source

 

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

#warning Incomplete implementation, return the number of sections

    return 1;

}

 

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

#warning Incomplete implementation, return the number of rows

    return 50;

}

 

 

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

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

    

    cell.textLabel.text = [NSString stringWithFormat:@"%@-%ld",self.title,indexPath.row];

    

    return cell;

}

 

@end

 

 

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