遵循iOS教程時找不到特定的代碼

Question

我是iOS編程的新手，正在閱讀本教程以了解http://www.raywenderlich.com/1797/how-to-create-a-simple-iphone-app-tutorial-part-1

有一部分告訴我打開我的MasterViewController.m並執行以下操作：

// Replace the return statement in tableView:numberOfRowsInSection with the following:
return _bugs.count;

和這個：

// Replace tableView:cellForRowAtIndexPath with the following
- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView
                             dequeueReusableCellWithIdentifier:@"MyBasicCell"];
    ScaryBugDoc *bug = [self.bugs objectAtIndex:indexPath.row];
    cell.textLabel.text = bug.data.title;
    cell.imageView.image = bug.thumbImage;
    return cell;
}

但是，在此類中找不到類似“ tableView：numberOfRowsInSection”或“ tableView：cellForRowAtIndexPath”的語句。

這是我的MasterViewController.m類的代碼：

#import "ScaryBugsMasterViewController.h"
#import "ScaryBugDoc.h"
#import "ScaryBugData.h"

@implementation ScaryBugsMasterViewController

@synthesize bugs = _bugs;


- (void)awakeFromNib
{
    [super awakeFromNib];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.title = @"Scary Bugs"; 
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return YES;
}

/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the specified item to be editable.
    return YES;
}
*/

/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source.
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
    }   
}
*/

/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/

/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the item to be re-orderable.
    return YES;
}
*/

@end

創建類時，我做錯什么了嗎？

謝謝。

Answer 1

UITableView需要這三種方法才能工作。

（1）在表格中指定節數

（2）指定表格中每節的行數

（3）創建將填充表行的UITableViewCell

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

- (NSInteger)tableView:(UITableView *)tableView
 numberOfRowsInSection:(NSInteger)section
{
    return [self.bugs count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView
                             dequeueReusableCellWithIdentifier:@"MyBasicCell"];
    ScaryBugDoc *bug = [self.bugs objectAtIndex:indexPath.row];
    cell.textLabel.text = bug.data.title;
    cell.imageView.image = bug.thumbImage;
    return cell;
}

編輯：導航到頁面底部，然后下載源代碼。 這些方法在MasterViewController中實現。

創建新類時，只需將UITableViewController子類化，這些方法模板將自動包含在該類中，您只需實現它們即可。

Answer 2

看起來您正在使用UIViewController而不是UITableViewController。 如果使用UITableViewController，則將獲得表視圖委托和數據源方法的存根。