I have a tabbar in my project and each tab bar has a tableview.
I want to open a detail screen when click a row in a tableview as follows. But nothing happens.
Where's the mistake I'm doing. How should I set up a logic.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
DetailScreen *detail = [[DetailScreen alloc] initWithNibName:#"DetailScreen" bundle:nil];
[self.navigationController pushViewController:detail animated:YES];
[detail release];
}
There are many possible reasons nothing is happening when you click on a cell.
Put a break point in this method. Is It even being called?
After the App has stopped at the breakpoint, go to the console type po detail after the instance is initialised. Make sure it's not (null)
Also try typing po [self navigationController] to check whether the navigation controller exists.
You've probably not got a navigation controller. How are you creating the tabbarcontroller? in interface builder or through code in the AppDelegate's didFinishLaunchingWithOptions: method?
Have you done this?
YourViewController *yourVC = [[YourViewController alloc] initWithNibName:#"YourViewController" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:yourVC];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:navigationController, nil];
try this,
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
DetailScreen *detail = [[DetailScreen alloc] init];
[self.navigationController pushViewController:detail animated:YES];
[detail release];
}
I guess you don't have a navigation controller so
[self.navigationController pushViewController:detail animated:YES];
will not work.
use
[self.view addSubview:detail.view]
or
[self presentModalViewController:detail animated:YES];
instead
If your project is UITabBarViewController based application, i dont think your can navigate to another view using pushViewController unless you have navigationController in your project.
Add your view controller(your table view containing controller) into navigation controller and then start using
DetailScreen *detail = [[DetailScreen alloc] initWithNibName:#"DetailScreen" bundle:nil];
[self.navigationController pushViewController:detail animated:YES];
[self.navigationController pushViewController:detail animated:YES];
Instead move your detail push code to another method and call:
[self performSelector:#selector(myMethod:) withObject:nil]
Related
In My Application I Build Every Thing Dynamic And I Doesn't Use Storyboard .
I Cannot push view controller when i pressed in cell
This is My Code .
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
TripDetailView * TripDetailViewObjec = [[TripDetailView alloc]init];
[self.navigationController pushViewController:TripDetailViewObjec animated:YES];
}
what i can do in this problem?
thanks in advance
In Your App Delegate, first create a navigation controller and push your table view controller on it like this
UITableViewController *tvc = [[UITableViewController alloc] init]; // your tableViewController
UINavigationController *nav = [UINavigationController alloc] initWithRootViewController:tvc];
[tvc release];
self.window.rootViewController = nav;
[nav release];
than your navigation controller wont be null and you can push new View Controller on It, like this!
TripDetailView * TripDetailViewObjec = [[TripDetailView alloc]init];
[self.navigationController pushViewController:TripDetailViewObjec animated:YES];
I have posted similar question previously, but this time I am providing some code for analysis. I am creating PopOverController in my AppDelegate.m file and I am adding a NavigationController variable which I want to pass to PopOverController.m file so that using that I want to push other views. Here is how I am creating the PopOver in AppDelegate.m
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
if([viewController isKindOfClass:[SecondViewController class]]){
NSInteger index = [[self tabBarController] selectedIndex];
CGRect buttonFrame = [[[[[self tabBarController] tabBar] subviews] objectAtIndex:index+1] frame];
PopOverViewController *popoverContentController = [[PopOverViewController alloc]init];
UINavigationController *navcon = [[UINavigationController alloc]initWithRootViewController:popoverContentController];
popoverContentController.contentSizeForViewInPopover = CGSizeMake(250, 85);
popover = [[UIPopoverController alloc]initWithContentViewController:popoverContentController];
NSLog(#"X:%f Y:%f",buttonFrame.origin.x,buttonFrame.origin.y);
[popover presentPopoverFromRect:buttonFrame inView:self.tabBarController.tabBar permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
}
}
And in my PopOverController.m I am trying to use the NavigationController to choose views like this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
sendFeedback *sendEmailViewController = [[sendFeedback alloc]initWithNibName:#"sendFeedback" bundle:nil];
downLoad *downloadFilelViewController = [[downLoad alloc]initWithNibName:#"downLoad" bundle:nil];
if (indexPath.row == 0)
[self.navigationController pushViewController:sendEmailViewController animated:YES];
else
[self.navigationController pushViewController:downloadFilelViewController animated:YES];
}
But when I click on my TabBar item for the PopOver I am getting this SIGABRT message :
Terminating app due to uncaught exception 'NSGenericException', reason: 'The content view controller argument must be the root of its associated view controller hierarchy.'
Any reason why this is appearing? Is there somewhere I am making a mistake in my code ?
UINavigationController *navcon = [[UINavigationController alloc] initWithRootViewController:popoverContentController];
you are trying to put a popover controller in a navigation controller. I don't think you want this.
To put navigation in popover, you should do this,
UINavigationController *navcon = [[UINavigationController alloc] initWithRootViewController:myViewController];
popoverContentController = [UIPopoverController initWithContentViewController:navcon]
and init the navigation controller with the viewController you want, like TableViewController or something else.
I present a modalViewController that is actually a navigation controller with one view, and a custom navigation bar. The modal view appears fine as expected, but when I attempt to remove it from view using [self dismissModalViewControllerAnimated:YES], I am hitting a "-[UINavigationController modalViewController]: message sent to deallocated instance". Can't seem to figure this out. Any ideas?
Instantiating the ModalViewController:
// Make a navigation controller and add the view inside it
MyViewController *evc=[[MyViewController alloc] initWithNibName:#"MyViewController" bundle:nil];
//UINavigationController *nvc = [[UINavigationController alloc] initWithRootViewController:evc];
UINib *nib = [UINib nibWithNibName:#"UINavigationBarWithBackgroundImage" bundle:nil];
UINavigationController *nvc = [[nib instantiateWithOwner:nil options:nil] objectAtIndex:0];
[nvc setViewControllers:[NSArray arrayWithObject:evc]];
evc.delegate=self;
[evc release];
[self presentModalViewController:nvc animated:YES];
[nvc release];
and trying to remove it. This is where the error comes in:
[self dismissModalViewControllerAnimated:YES];
Not sure about this, but try it anyway:
Remove
[nvc release]
and see if
[self dismissModalViewControllerAnimated:YES];
now works.
Is there a reason you are loading two seperate nibs to show this modal? You do not need to load a nib containing a navigation controller to get this working.
Try something like this:
// Make a navigation controller and add the view inside it
MyViewController *evc= [[MyViewController alloc] initWithNibName:#"MyViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:evc];
evc.delegate=self;
[self presentModalViewController:navController animated:YES];
[evc release];
[navController release];
Quick question on popovers, i seem not grasp a way of closing a popview when i select something from it (tableview)
so i have a list items on a tableview which popup using a UIPopoverController so when i select an item i'd like to the popove to fade away.
MainViewController
- (IBAction)popoverFontName:(id)sender
CGRect popoverRect = [self.view convertRect:[popoverFontName frame]
fromView:[popoverFontName superview]];
TitleController *titleC=[[TitleController alloc]init];
popup =[[UIPopoverController alloc]initWithContentViewController:titleC];
[popup presentPopoverFromRect:popoverRect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
[popup setPopoverContentSize:CGSizeMake(50.0, 300.0)];
[titleC release];
}
TitleController
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *selectedLang = [titleList objectAtIndex:indexPath.row];
//Initialize the detail view controller and display it.
MyDetViewCont *myDetViewCont = [[MyDetViewCont alloc] initWithNibName:#"myDetViewCont" bundle:[NSBundle mainBundle]]; // view controller instance
}
On the title contoller i dont know how to dismiss the popover
You can call dismissPopoverAnimated: on the popoverController. You should keep an instance of your popover as an instance variable in order to dismiss from the UITableViewDelegate methods.
I have a problem that I had working in a test but now in a bigger application I can't seem to sort out.
First of I have a view that has six button each loads a different view I am using:
- (IBAction)showInfo2:(id)sender {
InfoViewController *Infocontroller = [[[InfoViewController alloc] initWithNibName:#"InfoView" bundle:nil] autorelease];
Infocontroller.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:Infocontroller animated:YES];
}
This seems to be working fine, and loads the next section, in this case 'infoview'.
I then load a tableview and fill it full f data from an xml feed, this again is now working, (although was not an easy task for me!).
The problem comes when I know try and use:
Nothing seems to happen, ie, the new view is not loaded.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic may go here -- for example, create and push another view controller.
SubInfoViewController *subInfoViewController = [[SubInfoViewController alloc] initWithNibName:#"SubInfoView" bundle:nil];
[self.navigationController pushViewController:subInfoViewController animated:YES];
[subInfoViewController release];
}
I know its being called because this works:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *message = [[NSString alloc] initWithFormat:#"You selected a row"];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Row Selected" message:message delegate:nil cancelButtonTitle:#"Yes I did" otherButtonTitles:nil];
[alert show];
[message release];
[alert release];
}
Any help more than welcome, and please be gentle newbie :)
You're view is probably push into navigation stack but you can't see it because your parent view is modal.
You can't try to display your SubInfoViewController like this :
SubInfoViewController *subcontroller=[[SubInfoViewController alloc] initWithNibName:#"SubInfoViewController" withBundle:nil];
[self presentModalViewController:subcontroller animated:YES];
[subcontroller release];
If you want to keep a navigation logic in your app, you should not display your InfoViewController modally but present it in a common way in your navigation stack.
You can try to dismiss your modal view before pushing your SubViewController. In this case you must do something like this :
SubInfoViewController *controller=[[SubInfoViewController alloc] initWithNibName:#"SubInfoViewController" bundle:nil];
[self.parentViewController pushViewController:controller animated:YES];
[self dismissModalViewControllerAnimated:YES];
[controller release];
You'll receive a warning because parentViewController may not respond to pushViewController: animated: but with a NSLog you'll see that your parentViewController is actually a UINavigationController.
Hope this helps !
What exactly is the problem? Your code looks fine at first glance.