Lala's Program Note 實作記錄: 19. 顯示文章內容

since: 2011/09/10
update: 2011/12/02

A. 開啟 ArticleViewController.h 檔案, 修改如下:
#import <UIKit/UIKit.h>

@interface ArticleViewController : UIViewController {
    //@add
    IBOutlet UILabel *titleLabel; // article 標題
    IBOutlet UILabel *subTitleLabel; // article 副標題
    IBOutlet UITextView *contentText; // article 內容
    NSManagedObject *article; // represents the current article
}

//@add
@property (nonatomic, retain) IBOutlet UILabel *titleLabel;
@property (nonatomic, retain) IBOutlet UILabel *subTitleLabel;
@property (nonatomic, retain) IBOutlet UITextView *contentText;
@property (nonatomic, retain) NSManagedObject *article;

@end

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B. 開啟 ArticleViewController.m 檔案, 修改如下:
@synthesize titleLabel, subTitleLabel, contentText, article;

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

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    if (article != nil) {
        titleLabel.text = [article valueForKey:@"title"];
        subTitleLabel.text = [article valueForKey:@"subTitle"];
        contentText.text = [article valueForKey:@"content"];

        titleLabel.textColor = [UIColor darkGrayColor];
        subTitleLabel.textColor = [UIColor darkGrayColor];
        contentText.textColor = [UIColor darkGrayColor]; 

    }
    else {
    }
}

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C. 開啟 ArticleListViewController.m 檔案, 修改如下:
//@add
-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
   
    ArticleViewController *articleViewController = [[ArticleViewController alloc] init];
   
    NSManagedObject *article = [[self fetchedResultsController] objectAtIndexPath:indexPath];
   
    //articleViewController.title = [NSString stringWithFormat:@"%@",[article valueForKey:@"title"]];
    articleViewController.article = article;
   
    [self.navigationController pushViewController:articleViewController animated:YES];
   
    [articleViewController release];
}

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D. 開啟 ArticleViewController.xib 檔案設計 UI 如下:

   1. 新增四個 Label, 一個 TextView(取消編輯功能)
   2. 將 File's Owner 的 titleLabel, subTitleLabel 與 contentText 分別連結至
       對應的二個 Label 與 TextView