我试图访问在一个视图控制器中声明的属性和对象到我需要它们的页面。通过子类化视图控制器来实现。但这里有个问题,继承的控制器使控制器被覆盖。我的意思是子类化控制器的导航栏和头部视图会显示在used视图中。当我删除[super viewDidLoad]方法时,需要显示的值没有显示。继承视图控制器的头部视图也会显示出来。我使用以下语句进行子类化:我还发布了代码:
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 @"";
}
但是不工作,请帮我摆脱这个,谢谢ben先生的回答:)
我还有一个问题,如果可能的话,请检查一下,提前谢谢:)
按顺序用sqlite数据库中的表行填充表视图节
您的描述有点令人困惑,但听起来像您的超类在子类中设置标题/按钮信息后设置它。重新排序你的viewDidLoad所以[super viewDidLoad];