新闻头条-软件开发

在我们生活中。浏览新闻的软件处处可见，今日头条，腾讯新闻我们能够浏览到最新的咨询

手机新闻时时在更新。并且内容格式不一，对于开发人员来说必须好好进行需求分析 

今天讲的这些问题适合刚開始学习的人学习

这个项目使用了mvc 设计思路 将数据 view controller 进行分离 分别进行封装 

这个项目 有几个模块 有四种不同的cell 里面的内容 图片 也不同 ，我们要对其进行一层层封装 

好的代码不是一下完毕的 我们须要先将基本功能完毕，然后对我们的代码进行重构。优化 

这样以来代码的质量会提升，而且易于维护，添加了这款软件的生命周期 

上主要代码了：

//
//  QHViewController.h


#import <UIKit/UIKit.h>

@interface QHViewController : UIViewController

@end

//  QHViewController.m


#import "QHViewController.h"
#import "QHnews.h"
#import "NSArray+Ext.h"
#import "QHLargeCell.h"
#import "QHListCell.h"
#import "QHOriginCell.h"
#import "QHAppCell.h"


@interface QHViewController ()<UITableViewDataSource,UITableViewDelegate>

@property(nonatomic,strong)NSArray *newses;

@end


@implementation QHViewController

-(NSArray *)newses
{
    if (_newses == nil) {
        NSString *path = [[NSBundle mainBundle]pathForResource:@"news.plist" ofType:nil];
        NSArray *array = [NSArray arrayWithContentsOfFile:path];
        
        NSMutableArray *objs = [NSMutableArray array];
        for(NSDictionary *dic in array)
        {
            //封装模型 
            QHnews *news = [QHnews newsWithDict:dic];
            [objs addObject:news];
            
        }
        
        _newses = objs;
    }
    return _newses;
}

#pragma mark UITableViewDataSource 代理方法
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.newses.count;
}

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

    UITableViewCell * cell = [[UITableViewCell alloc]init];
    /*
    if (cell == nil) {
        cell = [tableView dequeueReusableCellWithIdentifier:cellName];
    }
    cell.textLabel.text = @"test";
    */
    
    QHnews *news = self.newses[indexPath.row];
    if ([news.category isEqualToString:@"large"]) {
        QHLargeCell *cell = [QHLargeCell largeCellWithTableView:tableView];
        cell.news = self.newses[indexPath.row];
        return cell;
    }
    if ([news.category isEqualToString:@"list"]) {
        QHListCell *cell = [QHListCell listCellWithTableView:tableView];
        cell.news = self.newses[indexPath.row];
        return cell;
    }
    if ([news.category isEqualToString:@"origin"]) {
        QHOriginCell *cell = [QHOriginCell originWithTableView:tableView];
        cell.news = self.newses[indexPath.row];
        return cell;
    }
    if([news.category isEqualToString:@"app"])
    {
        QHAppCell *cell = [QHAppCell appWithTableView:tableView];
        cell.news = self.newses[indexPath.row];
        return cell;
    }
    return cell;
    
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    QHnews *news = self.newses[indexPath.row];
    
    if([news.category isEqualToString:@"large"])
    {
        return 150;
    }
    if ([news.category isEqualToString:@"list"]) {
        return 150;
        
    }
    if([news.category isEqualToString:@"origin"])
    {
        return 100;
    }
    if ([news.category isEqualToString:@"app"]) {
        return 120;
    }
    return 100;
}
-(BOOL)prefersStatusBarHidden
{
    return YES;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    //NSLog(@"%@",self.newses);
 
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end

视图封装：

//
//  QHLargeCell.h

#import <UIKit/UIKit.h>
#import "QHnews.h"

@interface QHLargeCell : UITableViewCell
@property(nonatomic,strong)QHnews *news;
+(id)largeCellWithTableView:(UITableView *)tableView;


@end

//
//  QHLargeCell.m

#import "QHLargeCell.h"

@interface QHLargeCell()
@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
@property (weak, nonatomic) IBOutlet UIImageView *pictureImageView;

@property (weak, nonatomic) IBOutlet UILabel *sourceLabel;

@property (weak, nonatomic) IBOutlet UILabel *timeLabel;

@end

@implementation QHLargeCell


+(id)largeCellWithTableView:(UITableView *)tableView
{
    NSString *name = NSStringFromClass([self class]);
    UINib *nib = [UINib nibWithNibName:name bundle:nil];
    
    [tableView registerNib:nib forCellReuseIdentifier:name];
    
    return [tableView dequeueReusableCellWithIdentifier:name];
}

-(void)setNews:(QHnews *)news
{
    _news = news;
    
    self.titleLabel.text = news.title;
    self.sourceLabel.text = news.source;
    self.timeLabel.text = news.time;
    self.pictureImageView.image = [UIImage imageNamed:news.picture];
   // NSLog(@"%@---------------",news.picture);
   // NSLog(@"%@++++++",self.pictureImageView.image);
}


- (void)awakeFromNib {
    // Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end

数据模型封装

//
//  QHnews.h

//建立数据模型

#import <Foundation/Foundation.h>

@interface QHnews : NSObject



/**
 *  新闻条目分类
 */
@property(nonatomic,copy)NSString *category;
/**
 *  记录图片数组
 */
@property(nonatomic,strong)NSArray *pics;

/**
 *  数据来源
 */

@property(nonatomic,copy)NSString *source;
/**
 *  公布时间
 */

@property(nonatomic,copy)NSString *time;

/**
 *  标题
 */

@property(nonatomic,copy)NSString *title;

/**
 *  用来记录单张图片
 */
@property(nonatomic,copy)NSString *picture;

/**
 *  用来记录推广软件的名称
 */
@property(nonatomic,copy)NSString *appname;

/**
 *  推广软件图片
 */
@property(nonatomic,copy)NSString *icon;

@property(nonatomic,strong)QHnews *news;
+(id)newsWithDict:(NSDictionary *)dict;
-(id)initWithDict:(NSDictionary *)dict;
@end

//
//  QHnews.m

#import "QHnews.h"

@implementation QHnews
+(id)newsWithDict:(NSDictionary *)dict
{
    return [[self alloc]initWithDict:dict];
}
-(id)initWithDict:(NSDictionary *)dict
{
    if (self == [super init]) {
        [self setValuesForKeysWithDictionary:dict];
    }
    
    return self;
}

- (NSString *)description
{
    return [NSString stringWithFormat:@"catefory = %@,source = %@,title = %@", _category,_source,_title];
}
@end