新聞頭條-軟件開發

在咱們生活中。瀏覽新聞的軟件到處可見，今日頭條，騰訊新聞咱們可以瀏覽到最新的諮詢

手機新聞時時在更新。而且內容格式不一，對於開發人員來講必須好好進行需求分析 

今天講的這些問題適合剛開始學習的人學習

這個項目使用了mvc 設計思路 將數據 view controller 進行分離 分別進行封裝 

這個項目 有幾個模塊 有四種不一樣的cell 裏面的內容 圖片 也不一樣 ，咱們要對其進行一層層封裝 

好的代碼不是一下完畢的 咱們需要先將基本功能完畢，而後對咱們的代碼進行重構。優化 

這樣以來代碼的質量會提高，並且易於維護，添加了這款軟件的生命週期 

上主要代碼了：

//
//  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)
        {
            //封裝模型 
            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

視圖封裝：

//
//  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

數據模型封裝

//
//  QHnews.h

//創建數據模型

#import <Foundation/Foundation.h>

@interface QHnews : NSObject



/**
 *  新聞條目分類
 */
@property(nonatomic,copy)NSString *category;
/**
 *  記錄圖片數組
 */
@property(nonatomic,strong)NSArray *pics;

/**
 *  數據來源
 */

@property(nonatomic,copy)NSString *source;
/**
 *  公佈時間
 */

@property(nonatomic,copy)NSString *time;

/**
 *  標題
 */

@property(nonatomic,copy)NSString *title;

/**
 *  用來記錄單張圖片
 */
@property(nonatomic,copy)NSString *picture;

/**
 *  用來記錄推廣軟件的名稱
 */
@property(nonatomic,copy)NSString *appname;

/**
 *  推廣軟件圖片
 */
@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