• 1新建如下图所示

  
  image.png
  image.png
  

  DataManager.h

#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@interface DataManager : NSObject
+(NSArray*)allDatas;
//从plist文件中获取数据
+(NSArray*)allDatasForPlist:(NSString*)plistName;
//从网络获取数据
+(NSArray*)allDatasForNetURL:(NSString*)url;
@end
NS_ASSUME_NONNULL_END

DataManager.m

#import "DataManager.h"
#import "TRStudent.h"
@implementation DataManager
+(NSArray*)allDatas
{
    return [DataManager allDatasForPlist:@"TRStudent"];
}
+(NSArray*)allDatasForPlist:(NSString*)plistName
{   //单独有个 解析类
    NSMutableArray *mArray = [NSMutableArray array];
    NSString *path = [[NSBundle mainBundle]pathForResource:plistName ofType:@"plist"];
    NSArray *students = [NSArray arrayWithContentsOfFile:path];
    NSLog(@"%@",students);
    for (NSDictionary *dic in students) {
   //从字典取出数据 创建对象
        TRStudent *stu = [[TRStudent alloc]init];
        stu.name = dic[@"name"];
        stu.age = [dic[@"age"]integerValue];
        //将创建好的学生对象添加到数组中
        [mArray addObject:stu];
    }
    return mArray;
}
//从网络获取数据
+(NSArray*)allDatasForNetURL:(NSString*)url
{   //单独 网络 功能
    return nil;
}
@end

TRStudent.h建了与plist文件相同的两个属性没有创建其他方法和事件

TRStudentTableViewController.m

#import "TRStudentTableViewController.h"
#import "DataManager.h"
#import "TRStudent.h"
@interface TRStudentTableViewController ()
@property(nonatomic,strong)NSArray *array;
@end

@implementation TRStudentTableViewController
-(NSArray *)array{
    if(!_array){
        _array = [DataManager allDatas];
    }
    return _array;
}
- (void)viewDidLoad {
    [super viewDidLoad];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView
 numberOfRowsInSection:(NSInteger)section {

    return self.array.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
 cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
@"reuseIdentifier"];
    if(!cell){
   cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 
reuseIdentifier:@"reuseIdentifier"];
    }
    TRStudent *stu = self.array[indexPath.row];
     cell.textLabel.text = stu.name;
     cell.detailTextLabel.text = [NSString 
stringWithFormat:@"%ld",stu.age];
     return cell;
}

练习新闻列表

下述练习提到了KVC和用xib创建表头存在的bug即处理方式

记住图片的显示方法cell.newsImageView.image = [UIImage imageNamed:newslist.newsImage];

image.png
image.png

AppDelegate.m设置带导航的视图控制器

- (BOOL)application:(UIApplication *)application 
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc]initWithFrame:[UIScreen 
mainScreen].bounds];
    self.window.rootViewController = [[UINavigationController 
alloc]initWithRootViewController:
[[NewListTableViewController alloc]init]];
    [self.window makeKeyAndVisible];
    return YES;   
}

DataManager.m

#import "DataManager.h"
#import "NewsList.h"
@implementation DataManager
+(NSArray *)allDatas
{
    return [DataManager allDatasForPlist:@"news"];
}
+(NSArray *)allDatasForPlist:(NSString *)plistName
{
    NSMutableArray *mArray = [NSMutableArray array];
    NSString *path = [[NSBundle mainBundle]pathForResource:plistName ofType:@"plist"];
    NSArray *news = [NSArray arrayWithContentsOfFile:path];
     for (NSDictionary *dic in news) {
        NewsList *newlist = [[NewsList alloc]init];
         //KVC
         //是把字典中的key取出，查找相应的属性以后，用字典中的Value给属性赋值
         [newlist setValuesForKeysWithDictionary:dic];
//         newlist.title = dic[@"title"];
//         newlist.newsImage = dic[@"newsImage"];
//         newlist.commentCount = [dic[@"commentCount"]integerValue];
         [mArray addObject:newlist];
    }
    return mArray;
}

创建带.xibcell文件

image.png

创建自定义表头

image.png

NewListTableViewController.m

#import "NewListTableViewController.h"
#import "NewsList.h"
#import "DataManager.h"
#import "NewsCell.h"
@interface NewListTableViewController ()
@property(nonatomic,strong)NSArray *array;
@end

@implementation NewListTableViewController
-(NSArray*)array{
    if(!_array){
        _array = [DataManager allDatas];
    }
    return _array;
}
- (void)viewDidLoad {
    [super viewDidLoad];
      self.tableView.tableHeaderView = [[NSBundle mainBundle]
loadNibNamed:@"Header" owner:nil options:nil].firstObject;
    self.tableView.rowHeight = 60;
    UIView *headerView = [[NSBundle mainBundle]loadNibNamed:
@"Header" owner:nil options:nil].lastObject;
    UIView *myView = [[UIView alloc]initWithFrame:CGRectMake
(0, 0, headerView.frame.size.width, 
headerView.frame.size.height)];
    [myView addSubview:headerView];
    //如果表视图控制器没有用xib 那么 它的表头视图也不用xib,
不过我们可以把xib创建的视图，包在一个没有xib的表头视图中使用这样
就不会存在较大的缝隙
    self.tableView.tableHeaderView = myView;
}
#pragma mark - Table view data source
- (NSInteger)
numberOfSectionsInTableView:(UITableView 
*)tableView {
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView 
numberOfRowsInSection:(NSInteger)section {
    return self.array.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView 
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NewsCell *cell = [tableView 
dequeueReusableCellWithIdentifier:@"NewsCell"];
    if(!cell){
        cell = [[NSBundle mainBundle]loadNibNamed:@"NewsCell"
 owner:nil options:nil].firstObject;
    }
    NewsList *newslist = self.array[indexPath.row];
    cell.newsTitle.text = newslist.title;
    cell.newsImageView.image = [UIImage 
imageNamed:newslist.newsImage];
    cell.newsComment.text = [NSString stringWithFormat
:@"%ld",newslist.commentCount];
    return cell;
}

结果展示

image.png