网易新闻首页iOS

//

//  ViewController.m

//  wyy

//

//  Copyright © 2016年 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];

//给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年 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年 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