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.
Related
So i have set a plist and everytime someone click on the cell in table view i want it to load in the detail view. The only problem is that when it is clicked it loads a dark black screen with nothing on it. Any suggestions?
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(#"Index Selected,%d",indexPath.row);
WebViewController *modalView = [[WebViewController alloc] init];
NSString *urltoPass = [NSString stringWithString:[[tableData objectAtIndex:indexPath.row]objectForKey:#"cellSubtitle"]];
modalView.urlString = [[NSString alloc] initWithFormat:#"http://%#",urltoPass];
modalView.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentViewController:modalView animated:YES completion:nil];
}
You forgot to actually present the new view controller. You have to add the following line to the bottom of your didSelectRowAtIndexPath: method.
[self presentViewController:modalView animated:YES completion:nil];
Also, you can remove the line below entirely as it doesn't do anything in its current form.
[self.navigationController modalTransitionStyle];
I am trying to use an MGSplitViewController, but rather than having it set as the rootViewController, I want it to show modally. This is the code I am using so far
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath: (NSIndexPath *)indexPath
{
if(splitViewController == nil)
{
self.splitViewController = [[MGSplitViewController alloc] init];
self.rootViewController = [[RootViewController alloc] init];
self.detailViewController = [[DetailViewController alloc] init];
}
[splitViewController setViewControllers:[NSArray arrayWithObjects:rootViewController, detailViewController, nil]];
if (NO) { // whether to allow dragging the divider to move the split.
splitViewController.splitWidth = 15.0; // make it wide enough to actually drag!
splitViewController.allowsDraggingDivider = YES;
}
splitViewController.delegate = detailViewController;
[rootViewController performSelector:#selector(selectFirstRow) withObject:nil afterDelay:0];
[detailViewController performSelector:#selector(configureView) withObject:nil afterDelay:0];
[self presentViewController:splitViewController animated:YES completion:nil];
}
This works almost fine, but the buttons in the detailViewController do not work. They do nothing. Also, when I click a button in the left panel, the text doesn't change in the detailViewController as it does in the same project.
Am I missing something?
I'm also working with MGSplitViewController, but it sounds to me like you need to set up some communication between your master and detail views. If you look at the demo project, you can see they use delegates to that effect.
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]
Inside my TableView, I am pressing one of the cells to enter the detailed view, and for some reason it won't take me to the detailed view. Does anyone see a problem in the below code?
For context, this is a teacher directory, and pressing one of the cells brings up the teachers picture and other info.
Thanks for the help...if you need any more info I can add it in.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//Get the selected teacher
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:#"Teachers"];
NSString *selectedTeacher = [array objectAtIndex:indexPath.row];
//Initialize the detail view controller and display it.
DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:[NSBundle mainBundle]];
dvController.selectedTeacher = selectedTeacher;
[self.navigationController pushViewController:dvController animated:YES];
dvController = nil;
}
You should check if dvController is correctly loaded, so try to NSLog dvController once you have called the alloc-init. Another way to instantiate it is to use this simple call which works if you created the view controller and the xib together:
DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:nil bundle:nil];
Besides there is no reason to nil dvController at the end. If you're concerned with memory management, that is you don't want to leak dvController, simply autorelease it. So replace:
dvController=nil;
with:
[dvController autorelease];
this works because the navigation controller retains the pushed view controller
(or use ARC).
Finally I assume the tableView:didSelectRowAtIndexPath: is called... if not sure, just a place a breakpoint.
I don't know if you ever resolved your problem, but I was having the same problem where my Detail View was not appearing. I finally replaced
[self.navigationController pushViewController:dvController animated:YES];
with
[self presentModalViewController:dvController animated:YES];
and it worked. Hope that helps.
I have an iOS 5 application with a storyboard and two scenes. Scene 1 is a selection list while Scene 2 shows details for each selection
In Scene 1 I need to pass a variable and I do that with:
//Handles the selection
-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
Guests *myGuests =[guestList objectAtIndex:[indexPath row]];
selectedGuest = [[NSString alloc] initWithFormat:#"You have selected %#", myGuests.guestID];
[self performSegueWithIdentifier:#"TGG" sender:self];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if([[segue identifier] isEqualToString:#"TGG"]){
GuestDetailsViewController *vc = [segue destinationViewController];
[vc setGuestSelected:selectedGuest];
}
}
In Scene 2 (details) I use this to verify that the right variable was received like this
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
NSString *msg = [[NSString alloc] initWithFormat:#"You have selected %#", guestSelected];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Selection" message:msg delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
nameCell.textLabel.text= msg;
[super viewDidLoad];
}
All of this works fine and the alert box shows the right variable and there is a transition to the new scene. HOWEVER, the alert box displays a total of 5 times over & over and, once completed, the whole window is black. Nothing from my scene (Scene 2) is displayed at that point. So I know I have the right segue, it transitions as desired, I just can't see anything on my screen.
i ran into a situation very similar. i had unintentionally un-commented the method:
-(void)loadView
i believe this method overrides the IB interface and created it from this code instead. check to make sure it is either removed or commented out IMHO.