2011-11-30 54 views
1

我试图访问在一个视图控制器中声明的属性和对象,在我需要它们的页面中。通过继承视图控制器来实现。但是我遇到了问题在这里,继承控制器正在使控制器覆盖。我的意思是子类控制器的导航栏和标题视图显示在使用的视图中。当我删除[super viewDidLoad]方法时,需要显示的视图不是越来越displayed.Also继承视图控制器的标题视图越来越displayed.I并使用下面的语句继承:我也张贴代码:使用继承控制器覆盖标题查看标题

ERViewEditController class: 

    @interface ERViewEditController:ERAddReminderController 
    { 

     UITableView *theTable; 

    } 

    @property(nonatomic,retain) IBOutlet UITableView *theTable; 

    @end 

    @implementation ERViewEditController 

    // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. 
    - (void)viewDidLoad 
    { 
     self.view.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"bg.jpg"]]; 
     self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(pop:)]; 
     self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Edit" style:UIBarButtonItemStylePlain target:self action:@selector(edit:)]; 

     [self setTitle:@"Reminders Listed"]; 

     [self.theTable reloadData]; 
     [super viewDidLoad]; 
    } 

    - (UITableViewCell *)tableView:(UITableView *)view cellForRowAtIndexPath:(NSIndexPath *)indexPath 
    { 

     NSString *CellId = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row]; 

     UITableViewCell *cell = (UITableViewCell *)[view dequeueReusableCellWithIdentifier:CellId]; 

     UILabel *label1 = [[[UILabel alloc]initWithFrame:CGRectMake(54, 3, 100, 40)]autorelease]; 
     label1.backgroundColor = [UIColor clearColor]; 
     label1.textColor = [UIColor whiteColor]; 

     UILabel *label2 = [[[UILabel alloc]initWithFrame:CGRectMake(119, 3, 100, 40)]autorelease]; 
     label2.backgroundColor = [UIColor clearColor]; 
     label2.textColor = [UIColor whiteColor]; 

     UILabel *label3 = [[[UILabel alloc]initWithFrame:CGRectMake(198, 3, 100, 40)]autorelease]; 
     label3.backgroundColor = [UIColor clearColor]; 
     label3.textColor = [UIColor whiteColor]; 

     if (cell == nil) 
     { 
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellId] autorelease]; 
      view.backgroundColor = [UIColor clearColor]; 
      cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]]; 

      if (indexPath.section == 0) 
      { 
       UILabel *label = [[[UILabel alloc]initWithFrame:CGRectMake(20, 3, 280, 40)]autorelease]; 
       label.backgroundColor = [UIColor clearColor]; 
       label.text = @" ID Name  Event   Date"; 
       label.textColor = [UIColor cyanColor]; 
       [cell addSubview:label]; 
      } 

      else if (indexPath.section == 1) 
      { 
       const char *dbpath = [databasePath UTF8String]; 
       sqlite3_stmt *statement; 

       if (sqlite3_open(dbpath, &remindersDB) == SQLITE_OK) 
       { 
        NSString *querySQL = [NSString stringWithFormat:@"SELECT name,event,date FROM reminders"]; 

        const char *query_stmt = [querySQL UTF8String]; 

        if (sqlite3_prepare_v2(remindersDB ,query_stmt , -1, &statement, NULL) == SQLITE_OK) 
        { 
         if (sqlite3_step(statement) == SQLITE_ROW) 
         { 
          NSString *nameField = [[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]; 

          NSString *eventField = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)];      

          NSString *dateField = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)]; 

          [nameField stringByAppendingString:eventField]; 

          label1.text = nameField; 
          label2.text = eventField; 
          label3.text = dateField; 
         } 

         sqlite3_finalize(statement); 
        } 
        sqlite3_close(remindersDB); 
       } 

       switch (indexPath.row) 
       { 
        case 0: 
         [cell addSubview:label1]; 
         [cell addSubview:label2]; 
         [cell addSubview:label3]; 
         break; 

        default: 
         break; 
       } 

      } 

     } 

     return cell; 

    } 


My navigation bar issue is resolved,now I have still been facing the header view title issue,I used the following code to fix: 

-(NSString *)tableView:(UITableView *)atableView titleForHeaderInSection:(NSInteger)section 
{ 
    return @""; 
} 

但不工作请帮我摆脱这种感谢Mr.Ben的答案:)

我也有一个问题,请检查太多,如果可能的话,在此先感谢:)

Populate the table view sections with rows of table in sqlite database in an order

回答

1

您的描述有点令人困惑,但听起来您的超类在设置子类后设置了标题/按钮信息。重新排序你的viewDidLoad,使[super viewDidLoad];首先在函数中,任何子类的变化将在超类设置它后应用。

+0

Ben Yeah我明白了,谢谢你的回答,这对导航栏问题非常合适。但是标题视图仍然被继承视图控制器覆盖,请帮我解决这个问题! –

+0

请参阅编辑的答案和屏幕截图Mr.Ben,在此先感谢:) –

+0

本人发现解决方案,为什么继承控制器的标题视图正在显示... 由于视图控制器是subclassed所有功能,如导航酒吧,标题视图等将出现,因此我们需要实现超类的所有方法,即 正如我已经实现 - (UIView的*)的tableView:(UITableView的*)atableView viewForHeaderInSection:(NSInteger的)与标题继承控制器部分, 我们需要实现同样的方法,只是返回nil来解决这些问题 无论如何,感谢大家对我的问题的耐心和回应,再次感谢......再见TC。 –