版本记录
| 版本号 | 时间 |
|---|---|
| V1.0 | 2017.06.04 |
前言
网易新闻是门户网站，和今日头条类似，都是标签频道，每个频道都有对应的新闻，这一篇主要就是模拟网易新闻。
网易新闻图例
下面还是先看一下网易新闻的几个截图。
图1
图2
网易新闻模拟实现
下面我们先看一下代码组织结构。
网易新闻代码组织结构
下面直接看代码
1. JJHomeVC.h
#import <UIKit/UIKit.h>
@interface JJHomeVC : UIViewController
@end
2. JJHomeVC.m
#import "JJHomeVC.h"
#import "JJFlowLayout.h"
#import "JJChannelModel.h"
#import "JJChannelLabel.h"
#import "JJCollectionViewCell.h"
@interface JJHomeVC () <UIScrollViewDelegate, UICollectionViewDelegate, UICollectionViewDataSource>
@property (nonatomic, strong) UIScrollView *channelScrollView;
@property (nonatomic, strong) UICollectionView *newsCollectionView;
@property (nonatomic, strong) UICollectionViewFlowLayout *collectionLayout;
@property (nonatomic, strong) NSArray *channelArr;
@property (nonatomic, strong) NSMutableArray <JJChannelLabel *>*channelLabelArrM;
@end
@implementation JJHomeVC
static NSString * const kJJHomeVCCollectionViewReuserIdentify = @"kJJHomeVCCollectionViewReuserIdentify";
#pragma mark - Override Base Function
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"网易新闻";
self.view.backgroundColor = [UIColor whiteColor];
self.channelLabelArrM = [NSMutableArray array];
[self setupUI];
self.automaticallyAdjustsScrollViewInsets = NO;
[self createChannelLabels];
NSLog(@"%@----",self.channelArr);
}
#pragma mark - Object Private Function
- (void)createChannelLabels
{
self.channelArr = [JJChannelModel gainChannelArr];
CGFloat labelWidth = 80.0;
CGFloat lableHeight = self.channelScrollView.bounds.size.height;
for (NSInteger i = 0; i < self.channelArr.count; i++) {
JJChannelLabel *label = [[JJChannelLabel alloc] init];
[self.channelScrollView addSubview:label];
CGFloat labelMinX = i * labelWidth;
label.frame = CGRectMake(labelMinX, 0.0, labelWidth, lableHeight);
JJChannelModel *model = self.channelArr[i];
label.text = model.tname;
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDidTapped:)];
[label addGestureRecognizer:tapGesture];
label.userInteractionEnabled = YES;
label.tag = i;
[self.channelLabelArrM addObject:label];
if (i == 0) {
label.scale = 1.0; //默认第一个为最大的缩放比
}
}
self.channelScrollView.contentSize = CGSizeMake(labelWidth * self.channelArr.count, 0);
}
- (void)setupUI
{
//scrollView
UIScrollView *channelScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 64.0, kJJCommonScreenWidth, 80.0)];
channelScrollView.backgroundColor = [UIColor whiteColor];
channelScrollView.showsHorizontalScrollIndicator = NO;
[self.view addSubview:channelScrollView];
self.channelScrollView = channelScrollView;
//collectionView
JJFlowLayout *layout = [[JJFlowLayout alloc] init];
UICollectionView *newsCollectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0.0, 144.0, kJJCommonScreenWidth, kJJCommonScreenHeight - 144.0) collectionViewLayout:layout];
newsCollectionView.pagingEnabled = YES;
[newsCollectionView registerClass:[JJCollectionViewCell class] forCellWithReuseIdentifier:kJJHomeVCCollectionViewReuserIdentify];
newsCollectionView.delegate = self;
newsCollectionView.dataSource = self;
[self.view addSubview:newsCollectionView];
self.newsCollectionView = newsCollectionView;
}
#pragma mark - Action && Notification
- (void)tapDidTapped:(UITapGestureRecognizer *)tapGesture
{
JJChannelLabel *selectedChannelLabel = (JJChannelLabel *)tapGesture.view;
//计算选中标签滚动到居中时,需要的偏移量
CGFloat offsetX = selectedChannelLabel.center.x - (self.view.bounds.size.width * 0.5);
//设置最大和最小滚动的临界值
CGFloat minOffset = 0;
CGFloat maxOffset = self.channelScrollView.contentSize.width - self.view.bounds.size.width;
//判断是否超出了最大和最小滚动范围
if (offsetX < minOffset) {
offsetX = minOffset;
}
if(offsetX > maxOffset){
offsetX = maxOffset;
}
//把channelScrollView滚动到指定的位置
[self.channelScrollView setContentOffset:CGPointMake(offsetX, 0) animated:YES];
//把新闻滚动视图滚动到指定的位置
NSIndexPath *indexPath = [NSIndexPath indexPathForItem:selectedChannelLabel.tag inSection:0];
[self.newsCollectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionNone animated:NO];
NSInteger index = selectedChannelLabel.tag;
// 需要把选中的标签设置最大的缩放比,非选中的还原
for (NSInteger i = 0; i < self.channelLabelArrM.count; i++) {
JJChannelLabel *label = self.channelLabelArrM[i];
if (index == i) {
label.scale = 1.0;
}
else {
label.scale = 0.0;
}
}
}
#pragma mark - UIScrollViewDelegate
//底部滚动视图联动频道标签
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
//获取新闻滚动视图的偏移量,然后简介获取滚动的到index
NSInteger index = scrollView.contentOffset.x/kJJCommonScreenWidth;
//拿着新闻滚动视图是滚动时,获取的index,去标签数组里面找对应的标签,计算居中时需要滚动的偏移量
JJChannelLabel *selectedLabel = self.channelLabelArrM[index];
//计算选中标签滚动到居中时,需要的偏移量
CGFloat offsetX = selectedLabel.center.x - (self.view.bounds.size.width * 0.5);
//设置最大和最小滚动的临界值
CGFloat minOffset = 0;
CGFloat maxOffset = self.channelScrollView.contentSize.width - self.view.bounds.size.width;
//判断是否超出了最大和最小滚动范围
if (offsetX < minOffset) {
offsetX = minOffset;
}
else if(offsetX > maxOffset){
offsetX = maxOffset;
}
[self.channelScrollView setContentOffset:CGPointMake(offsetX, 0) animated:YES];
}
//频道标签的缩放
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
//获取偏移量
CGFloat indexOffsetX = scrollView.contentOffset.x / self.view.bounds.size.width;
//滚动的索引
NSInteger index = scrollView.contentOffset.x / self.view.bounds.size.width;
//偏移百分比
CGFloat percent = indexOffsetX - index;
//要实现标签的缩放,需要计算四个值:左边标签索引,右边标签索引,左边标签缩放比,右边标签缩放比
CGFloat rightScale = percent;
CGFloat leftScale = 1 - rightScale;
NSInteger leftIndex = index;
NSInteger rightIndex = leftIndex + 1;
//获取左边的标签
JJChannelLabel *leftChannelLabel = self.channelLabelArrM[leftIndex];
leftChannelLabel.scale = leftScale;
//获取右边的标签:防止脚标越界崩溃
if (rightIndex < self.channelLabelArrM.count) {
JJChannelLabel *rightLabel = self.channelLabelArrM[rightIndex];
rightLabel.scale = rightScale;
}
}
#pragma mark - UICollectionViewDataSource && UITableViewDelegate
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return self.channelArr.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
JJCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kJJHomeVCCollectionViewReuserIdentify forIndexPath:indexPath];
JJChannelModel *model = self.channelArr[indexPath.item];
NSString *URLStr = [NSString stringWithFormat:@"article/list/%@/0-20.html",model.tid];
cell.URLStr = URLStr;
return cell;
}
@end
3. JJChannelModel.h
#import <Foundation/Foundation.h>
@interface JJChannelModel : NSObject
@property (nonatomic, copy) NSString *tname;
@property (nonatomic, copy) NSString *tid;
+ (NSArray *)gainChannelArr;
@end
4. JJChannelModel.m
#import "JJChannelModel.h"
@implementation JJChannelModel
#pragma mark - Override Base Function
- (void)setValue:(id)value forUndefinedKey:(NSString *)key
{
//这里什么都不做
}
- (NSString *)description
{
return [NSString stringWithFormat:@"%@ -- %@",self.tname,self.tid];
}
#pragma mark - Class Private Function
+ (instancetype)channelModelWithDict:(NSDictionary *)dict
{
JJChannelModel *model = [[JJChannelModel alloc] init];
[model setValuesForKeysWithDictionary:dict];
return model;
}
#pragma mark - Class Public Function
+ (NSArray *)gainChannelArr
{
NSString *filePathStr = [[NSBundle mainBundle] pathForResource:@"topic_news.json" ofType:nil];
NSData *jsonData = [NSData dataWithContentsOfFile:filePathStr];
NSDictionary *resultDict = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:NULL];
NSArray *contentArr = [resultDict objectForKey:@"tList"];
NSMutableArray *contentArrM = [NSMutableArray arrayWithCapacity:contentArr.count];
[contentArr enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
JJChannelModel *model = [JJChannelModel channelModelWithDict:obj];
[contentArrM addObject:model];
}];
//按照tid从小到大排序
[contentArrM sortUsingComparator:^NSComparisonResult(JJChannelModel* obj1,JJChannelModel* obj2) {
return [obj1.tid compare:obj2.tid];
}];
return contentArrM.copy;
}
@end
5. JJNewsModel.h
#import <Foundation/Foundation.h>
@interface JJNewsModel : NSObject
@property (nonatomic,copy) NSString *title; // 新闻标题
@property (nonatomic,copy) NSString *imgsrc; // 新闻图标
@property (nonatomic,copy) NSString *source; // 新闻来源
@property (nonatomic,strong) NSNumber *replyCount; // 新闻回复数
@property (nonatomic, strong) NSArray *imgextra; // 多张配图
@property (nonatomic, assign) BOOL imgType; // 大图标记
@end
6. JJNewsModel.m
#import "JJNewsModel.h"
@implementation JJNewsModel
- (NSString *)description
{
return [NSString stringWithFormat:@"%@-%@-%@",self.title,self.source,self.replyCount];
}
@end
7. JJNetworkTool.h
#import <AFNetworking/AFNetworking.h>
@interface JJNetworkTool : AFHTTPSessionManager
/// 单例的全局访问点
+ (instancetype)sharedTool;
/**
封装的网络请求工具类的GET方法
@param URLString 请求的地址
@param parameters 请求的参数
@param success 成功的回调
@param failed 失败的回调
*/
- (void)GETWithURLString:(NSString *)URLString parameters:(id)parameters success:(void(^)(id responseObject))success failed:(void(^)(NSError *error))failed;
@end
8. JJNetworkTool.m
#import "JJNetworkTool.h"
@implementation JJNetworkTool
#pragma mark - Class Public Function
+ (instancetype)sharedTool
{
static JJNetworkTool *instance;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
NSURL *baseURL = [NSURL URLWithString:@"http://c.m.163.com/nc/"];
instance = [[self alloc] initWithBaseURL:baseURL];
// 增加AFN支持的文件类型
instance.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html", @"text/plain", nil];
});
return instance;
}
#pragma mark - Object Private Function
// AFHTTPSessionManager发送GET请求
- (void)GETWithURLString:(NSString *)URLString parameters:(id)parameters success:(void (^)(id))success failed:(void (^)(NSError *))failed
{
[self GET:URLString parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
if (success) {
success(responseObject);
}
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
if (failed) {
failed(error);
}
}];
}
@end
9. JJFlowLayout.h
#import <UIKit/UIKit.h>
@interface JJFlowLayout : UICollectionViewFlowLayout
@end
10. JJFlowLayout.m
#import "JJFlowLayout.h"
@implementation JJFlowLayout
- (void)prepareLayout
{
[super prepareLayout];
self.itemSize = CGSizeMake(kJJCommonScreenWidth, kJJCommonScreenHeight - 144.0);
self.minimumLineSpacing = 0.0;
self.minimumInteritemSpacing = 0.0;
self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
}
@end
11. JJChannelLabel.h
#import <UIKit/UIKit.h>
@interface JJChannelLabel : UILabel
@property (nonatomic, assign) CGFloat scale; //缩放比 0.0~1.0
@end
12. JJChannelLabel.m
#import "JJChannelLabel.h"
@implementation JJChannelLabel
#pragma mark - Override Base Function
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
[self setupUI];
}
return self;
}
#pragma mark - Object Private Function
- (void)setupUI
{
self.textAlignment = NSTextAlignmentCenter;
self.font = [UIFont systemFontOfSize:16.0];
}
#pragma mark - Getter && Setter
- (void)setScale:(CGFloat)scale
{
_scale = scale;
//标签渐变色 黑---红
self.textColor = [UIColor colorWithRed:scale green:0 blue:0 alpha:1.0];
//标签缩放
CGFloat minScale = 1.0;
CGFloat maxScale = 1.5;
scale = minScale + scale * (maxScale - minScale);
self.transform = CGAffineTransformMakeScale(scale, scale);
}
@end
13. JJCollectionViewCell.h
#import <UIKit/UIKit.h>
@interface JJCollectionViewCell : UICollectionViewCell
@property (nonatomic, copy) NSString *URLStr;
@end
14. JJCollectionViewCell.m
#import "JJCollectionViewCell.h"
#import "JJThreeMiddlePictureCell.h"
#import "JJOneBigPictureCell.h"
#import "JJOneSmallPictureCell.h"
#import "JJNewsModel.h"
#import "JJNetworkTool.h"
@interface JJCollectionViewCell () <UITableViewDelegate, UITableViewDataSource>
@property (nonatomic, strong) UITableView *newsTableView;
@property (nonatomic, strong) NSMutableArray *newsListArrM;
@end
@implementation JJCollectionViewCell
static NSString * const kJJOneBigPictureCellReuseIdentify = @"kJJOneBigPictureCellReuseIdentify";
static NSString * const kJJOneSmallPictureCellReuseIdentify = @"kJJJOneSmallPictureCellReuseIdentify";
static NSString * const kJJThreeMiddlePictureCellReuseIdentify = @"kJJThreeMiddlePictureCellReuseIdentify";
#pragma mark - Override Base Function
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
[self setupUI];
self.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1];//随机色
self.newsListArrM = [NSMutableArray array];
}
return self;
}
#pragma mark - Object Private Function
- (void)setupUI
{
//tableView
UITableView *newsTableView = [[UITableView alloc] initWithFrame:self.frame];
newsTableView.delegate = self;
newsTableView.dataSource = self;
[newsTableView registerClass:[JJOneBigPictureCell class] forCellReuseIdentifier:kJJOneBigPictureCellReuseIdentify];
[newsTableView registerClass:[JJThreeMiddlePictureCell class] forCellReuseIdentifier:kJJThreeMiddlePictureCellReuseIdentify];
[newsTableView registerClass:[JJOneSmallPictureCell class] forCellReuseIdentifier:kJJOneSmallPictureCellReuseIdentify];
[self.contentView addSubview:newsTableView];
self.newsTableView = newsTableView;
}
#pragma mark - Setter && Getter
- (void)setURLStr:(NSString *)URLStr
{
_URLStr = URLStr;
[[JJNetworkTool sharedTool] GETWithURLString:URLStr parameters:nil success:^(NSDictionary *responseObject) {
NSString *key = responseObject.keyEnumerator.nextObject;
NSArray *dictArr = responseObject[key];
NSArray *listArr = [NSArray yy_modelArrayWithClass:[JJNewsModel class] json:dictArr];
[self.newsListArrM addObjectsFromArray:listArr];
[self.newsTableView reloadData];
} failed:^(NSError *error) {
NSLog(@"%@",error);
}];
}
#pragma mark - UITableViewDelegate && UITableViewDataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.newsListArrM.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
JJNewsModel *newModel = self.newsListArrM[indexPath.row];
if (newModel.imgType == YES) {
JJOneBigPictureCell *cell = [tableView dequeueReusableCellWithIdentifier:kJJOneBigPictureCellReuseIdentify forIndexPath:indexPath];
cell.newsModel = newModel;
return cell;
}
else if(newModel.imgextra.count == 2) {
JJThreeMiddlePictureCell *cell = [tableView dequeueReusableCellWithIdentifier:kJJThreeMiddlePictureCellReuseIdentify forIndexPath:indexPath];
cell.newsModel = newModel;
return cell;
}
else {
JJOneSmallPictureCell *cell = [tableView dequeueReusableCellWithIdentifier:kJJOneSmallPictureCellReuseIdentify forIndexPath:indexPath];
cell.newsModel = newModel;
return cell;
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
JJNewsModel *newModel = self.newsListArrM[indexPath.row];
if (newModel.imgType == YES) {
return 180.0;
}
else if (newModel.imgextra.count == 2) {
return 140.0;
}
return 100.0;
}
@end
15. JJOneSmallPictureCell.h
#import <UIKit/UIKit.h>
@class JJNewsModel;
@interface JJOneSmallPictureCell : UITableViewCell
@property (nonatomic, strong) JJNewsModel *newsModel;
@end
16. JJOneSmallPictureCell.m
#import "JJOneSmallPictureCell.h"
#import "JJNewsModel.h"
@interface JJOneSmallPictureCell ()
@property (nonatomic, strong) UIImageView *picImageView;
@property (nonatomic, strong) UILabel *desclabel;
@property (nonatomic, strong) UILabel *sourceLabel;
@property (nonatomic, strong) UILabel *numLabel;
@end
@implementation JJOneSmallPictureCell
#pragma mark - Override Base Function
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
[self setupUI];
}
return self;
}
- (void)layoutSubviews
{
[super layoutSubviews];
//新闻图片
[self.picImageView mas_makeConstraints:^(MASConstraintMaker *make) {
make.width.height.equalTo(@80);
make.centerY.equalTo(self);
make.left.equalTo(self).offset(10.0);
}];
// self.picImageView.frame = CGRectMake(10.0, CGRectGetMidY(self.frame), 80, 80);
//新闻简介
[self.desclabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.picImageView);
make.left.equalTo(self.picImageView.mas_right).offset(6.0);
make.width.equalTo(@(kJJCommonScreenWidth - 80 - 10 - 10 - 6));
make.height.equalTo(@15);
}];
// self.desclabel.frame = CGRectMake(CGRectGetMaxX(self.picImageView.frame) + 6.0, CGRectGetMinY(self.picImageView.frame), kJJCommonScreenWidth - 80 - 10 - 10 - 6, 15);
//新闻来源
[self.sourceLabel sizeToFit];
[self.sourceLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.bottom.equalTo(self.picImageView);
make.left.equalTo(self.desclabel);
}];
// self.sourceLabel.frame = CGRectMake(CGRectGetMinX(self.desclabel.frame), CGRectGetMaxY(self.picImageView.frame) - CGRectGetHeight(self.sourceLabel.frame), CGRectGetWidth(self.sourceLabel.frame), CGRectGetHeight(self.sourceLabel.frame));
//新闻评论数
[self.numLabel sizeToFit];
[self.numLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.right.equalTo(self).offset(- 10.0);
make.bottom.equalTo(self.sourceLabel);
}];
// self.numLabel.frame = CGRectMake(CGRectGetWidth(self.frame) - 10.0 - CGRectGetWidth(self.numLabel.frame), CGRectGetMinY(self.sourceLabel.frame), CGRectGetWidth(self.numLabel.frame), CGRectGetHeight(self.numLabel.frame));
}
#pragma mark - Object Private Function
- (void)setupUI
{
self.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1];//随机色
//图示
UIImageView *picImageView = [[UIImageView alloc] init];
[self.contentView addSubview:picImageView];
picImageView.image = [UIImage imageNamed:@"placeholderImage"];
self.picImageView = picImageView;
//新闻简介
UILabel *desclabel = [[UILabel alloc] init];
desclabel.text = @"我来自火星";
desclabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:desclabel];
self.desclabel = desclabel;
//新闻来源
UILabel *sourceLabel = [[UILabel alloc] init];
sourceLabel.text = @"网易新闻";
sourceLabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:sourceLabel];
self.sourceLabel = sourceLabel;
//评论数
UILabel *numLabel = [[UILabel alloc] init];
numLabel.text = @"99999";
numLabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:numLabel];
self.numLabel = numLabel;
}
#pragma mark - Getter && Setter
- (void)setNewsModel:(JJNewsModel *)newsModel
{
_newsModel = newsModel;
[self.picImageView sd_setImageWithURL:[NSURL URLWithString:newsModel.imgsrc] placeholderImage:[UIImage imageNamed:@"placeholderImage"]];
self.desclabel.text = newsModel.title;
self.sourceLabel.text = newsModel.source;
// 需要把NSNumber转成NSString
self.numLabel.text = [NSString stringWithFormat:@"%@",newsModel.replyCount]?:@"";
}
@end
17. JJOneBigPictureCell.h
#import <UIKit/UIKit.h>
@class JJNewsModel;
@interface JJOneBigPictureCell : UITableViewCell
@property (nonatomic, strong) JJNewsModel *newsModel;
@end
18. JJOneBigPictureCell.m
#import "JJOneBigPictureCell.h"
#import "JJNewsModel.h"
@interface JJOneBigPictureCell ()
@property (nonatomic, strong) UIImageView *picImageView;
@property (nonatomic, strong) UILabel *desclabel;
@property (nonatomic, strong) UILabel *sourceLabel;
@property (nonatomic, strong) UILabel *numLabel;
@end
@implementation JJOneBigPictureCell
#pragma mark - Override Base Function
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
[self setupUI];
}
return self;
}
- (void)layoutSubviews
{
[super layoutSubviews];
//新闻图片
[self.picImageView mas_makeConstraints:^(MASConstraintMaker *make) {
make.height.equalTo(@120);
make.left.equalTo(self).offset(10.0);
make.width.equalTo(@(kJJCommonScreenWidth - 10 - 10));
make.centerY.equalTo(self);
}];
//新闻简介
[self.desclabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.bottom.equalTo(self.picImageView.mas_top).offset(-6.0);
make.left.equalTo(self.picImageView);
make.width.equalTo(@(kJJCommonScreenWidth - 10 - 10));
}];
//新闻来源
[self.sourceLabel sizeToFit];
[self.sourceLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.picImageView.mas_bottom).offset(6.0);
make.left.equalTo(self.picImageView);
}];
//新闻评论数
[self.numLabel sizeToFit];
[self.numLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.right.equalTo(self.picImageView);
make.centerY.equalTo(self.sourceLabel);
}];
}
#pragma mark - Object Private Function
- (void)setupUI
{
self.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1];//随机色
//图示
UIImageView *picImageView = [[UIImageView alloc] init];
picImageView.image = [UIImage imageNamed:@"placeholderImage"];
[self.contentView addSubview:picImageView];
self.picImageView = picImageView;
//新闻简介
UILabel *desclabel = [[UILabel alloc] init];
desclabel.text = @"我来自火星";
desclabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:desclabel];
self.desclabel = desclabel;
//新闻来源
UILabel *sourceLabel = [[UILabel alloc] init];
sourceLabel.text = @"网易新闻";
sourceLabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:sourceLabel];
self.sourceLabel = sourceLabel;
//评论数
UILabel *numLabel = [[UILabel alloc] init];
numLabel.text = @"99999";
numLabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:numLabel];
self.numLabel = numLabel;
}
#pragma mark - Getter && Setter
- (void)setNewsModel:(JJNewsModel *)newsModel
{
_newsModel = newsModel;
[self.picImageView sd_setImageWithURL:[NSURL URLWithString:newsModel.imgsrc] placeholderImage:[UIImage imageNamed:@"placeholderImage"]];
self.desclabel.text = newsModel.title;
self.sourceLabel.text = newsModel.source;
self.numLabel.text = [NSString stringWithFormat:@"%@",newsModel.replyCount]?:@"";
}
@end
19. JJThreeMiddlePictureCell.h
#import <UIKit/UIKit.h>
@class JJNewsModel;
@interface JJThreeMiddlePictureCell : UITableViewCell
@property (nonatomic, strong) JJNewsModel *newsModel;
@end
20. JJThreeMiddlePictureCell.m
#import "JJThreeMiddlePictureCell.h"
#import "JJNewsModel.h"
@interface JJThreeMiddlePictureCell ()
@property (nonatomic, strong) UIImageView *picImageViewLeft;
@property (nonatomic, strong) UIImageView *picImageViewMiddle;
@property (nonatomic, strong) UIImageView *picImageViewRight;
@property (nonatomic, strong) UILabel *desclabel;
@property (nonatomic, strong) UILabel *sourceLabel;
@property (nonatomic, strong) UILabel *numLabel;
@end
@implementation JJThreeMiddlePictureCell
#pragma mark - Override Base Function
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
[self setupUI];
}
return self;
}
- (void)layoutSubviews
{
[super layoutSubviews];
CGFloat marginWidth = (kJJCommonScreenWidth - 10 * 4)/3;
//左边图片
[self.picImageViewLeft mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(self).offset(10.0);
make.centerY.equalTo(self);
make.height.equalTo(@80);
make.width.equalTo(@(marginWidth));
}];
//中间图片
[self.picImageViewMiddle mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerY.equalTo(self.picImageViewLeft);
make.left.equalTo(self.picImageViewLeft.mas_right).offset(10.0);
make.height.equalTo(self.picImageViewLeft);
make.width.equalTo(@(marginWidth));
}];
//右边图片
[self.picImageViewRight mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerY.equalTo(self.picImageViewLeft);
make.left.equalTo(self.picImageViewMiddle.mas_right).offset(10.0);
make.width.height.equalTo(self.picImageViewLeft);
make.width.equalTo(@(marginWidth));
}];
//新闻简介
[self.desclabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.bottom.equalTo(self.picImageViewLeft.mas_top).offset(-10.0);
make.left.equalTo(self.picImageViewLeft);
make.width.equalTo(@(kJJCommonScreenWidth - 10 - 10));
}];
//新闻来源
[self.sourceLabel sizeToFit];
[self.sourceLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.picImageViewLeft.mas_bottom).offset(10.0);
make.left.equalTo(self.picImageViewLeft);
}];
//新闻评论数
[self.numLabel sizeToFit];
[self.numLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.right.equalTo(self.picImageViewRight);
make.centerY.equalTo(self.sourceLabel);
}];
}
#pragma mark - Object Private Function
- (void)setupUI
{
self.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1];//随机色
//左边图示
UIImageView *picImageViewLeft = [[UIImageView alloc] init];
picImageViewLeft.image = [UIImage imageNamed:@"placeholderImage"];
[self.contentView addSubview:picImageViewLeft];
self.picImageViewLeft = picImageViewLeft;
//中间图示
UIImageView *picImageViewMiddle = [[UIImageView alloc] init];
picImageViewMiddle.image = [UIImage imageNamed:@"placeholderImage"];
[self.contentView addSubview:picImageViewMiddle];
self.picImageViewMiddle = picImageViewMiddle;
//右边图示
UIImageView *picImageViewRight = [[UIImageView alloc] init];
picImageViewRight.image = [UIImage imageNamed:@"placeholderImage"];
[self.contentView addSubview:picImageViewRight];
self.picImageViewRight = picImageViewRight;
//新闻简介
UILabel *desclabel = [[UILabel alloc] init];
desclabel.text = @"我来自火星";
desclabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:desclabel];
self.desclabel = desclabel;
//新闻来源
UILabel *sourceLabel = [[UILabel alloc] init];
sourceLabel.text = @"网易新闻";
sourceLabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:sourceLabel];
self.sourceLabel = sourceLabel;
//评论数
UILabel *numLabel = [[UILabel alloc] init];
numLabel.text = @"99999";
numLabel.font = [UIFont systemFontOfSize:14.0];
[self.contentView addSubview:numLabel];
self.numLabel = numLabel;
}
#pragma mark - Getter && Setter
- (void)setNewsModel:(JJNewsModel *)newsModel
{
_newsModel = newsModel;
[self.picImageViewLeft sd_setImageWithURL:[NSURL URLWithString:newsModel.imgsrc] placeholderImage:[UIImage imageNamed:@"placeholderImage"]];
self.desclabel.text = newsModel.title;
self.sourceLabel.text = newsModel.source;
self.numLabel.text = [NSString stringWithFormat:@"%@",newsModel.replyCount]?:@"";
//中间图片
NSDictionary *imgDict = newsModel.imgextra[0];
NSString *imgsrc = imgDict[@"imgsrc"];
[self.picImageViewMiddle sd_setImageWithURL:[NSURL URLWithString:imgsrc] placeholderImage:[UIImage imageNamed:@"placeholderImage"]];
//右边图片
NSDictionary *imgRightDict = newsModel.imgextra[1];
NSString *imgsrcRight = imgRightDict[@"imgsrc"];
[self.picImageViewRight sd_setImageWithURL:[NSURL URLWithString:imgsrcRight] placeholderImage:[UIImage imageNamed:@"placeholderImage"]];
}
@end
网易模拟结果
下面看一下网易新闻的标签滚动和显示结果。
网易新闻
后记
这个只是网易新闻的demo，模拟标签的滚动和新闻的显示，未完，待续~~~
奋斗
