导航控制器、表格视图与故事板开发指南

# 导航控制器、表格视图与故事板开发指南 ## 1. 实现详细视图列表控制器 ### 1.1 修改 BIDPresidentsViewController.h 首先，我们需要对 `BIDPresidentsViewController.h` 进行修改，使其符合 `BIDPresidentDetailViewControllerDelegate` 协议，并添加一个可变数组属性 `presidents` 用于存储总统信息。以下是具体代码： ```objective-c #import "BIDSecondLevelViewController.h" #import "BIDPresidentDetailViewController.h" @interface BIDPresidentsViewController : BIDSecondLevelViewController <BIDPresidentDetailViewControllerDelegate> @property (strong, nonatomic) NSMutableArray *presidents; @end ``` ### 1.2 修改 BIDPresidentsViewController.m 接下来，切换到 `BIDPresidentsViewController.m` 文件，进行一系列的修改。这里主要涉及到初始化方法、视图加载方法、表格视图数据源方法、表格视图代理方法以及总统详情视图代理方法的实现。 ```objective-c #import "BIDPresidentsViewController.h" #import "BIDPresident.h" #import "BIDPresidentDetailViewController.h" static NSString *CellIdentifier = @"Cell"; @interface BIDPresidentsViewController () @end @implementation BIDPresidentsViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // 自定义初始化 self.title = @"Detail Edit"; self.rowImage = [UIImage imageNamed:@"detailEditIcon.png"]; NSString *path = [[NSBundle mainBundle] pathForResource:@"Presidents" ofType:@"plist"]; NSData *data = [[NSData alloc] initWithContentsOfFile:path]; NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data]; self.presidents = [unarchiver decodeObjectForKey:@"Presidents"]; [unarchiver finishDecoding]; } return self; } - (void)viewDidLoad { [super viewDidLoad]; // 在视图加载后进行额外的设置 [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:CellIdentifier]; } #pragma mark - 表格视图数据源方法 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [self.presidents count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; BIDPresident *president = self.presidents[indexPath.row]; cell.textLabel.text = president.name; return cell; } #pragma mark - 表格视图代理方法 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { BIDPresident *president = self.presidents[indexPath.row]; BIDPresidentDetailViewController *controller = [[BIDPresidentDetailViewController alloc] init]; controller.president = president; controller.delegate = self; controller.row = indexPath.row; [self.navigationController pushViewController:controller animated:YES]; } #pragma mark - 总统详情视图代理方法 - (void)presidentDetailViewController:(BIDPresidentDetailViewController *)controller didUpdatePresident:(BIDPresident *)president { [self.presidents replaceObjectAtIndex:controller.row withObject:president]; [self.tableView reloadData]; } @end ``` ### 1.3 代码解释 在 `initWithNibName:bundle:` 方法中，我们使用 `NSKeyedUnarchiver` 从属性列表文件中创建一个包含