i am using a UINavigationController in my application.
in the first view i am displaying some information and have a button for loading an picture from the camera. this works fine so far. when the picture was loaded, i want to display the picture in a UIImageView within a second view. Therefore i am using the following code.
MyAppDelegate *delegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];
CorrectedImageController *imageController = [[CorrectedImageController alloc] initWithNibName:#"CorrectedImageView" bundle:nil];
self.correctedImageViewController = imageController;
[imageController release];
[delegate.navController pushViewController:imageController animated:YES];
The second view is loaded and the picture is shown. But i get an EXC_BAD_ACCESS message in the Debugger Console and my Application blocks the UI.
In the second view the picture is loaded as follows:
- (void)viewDidLoad {
MyAppDelegate *delegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];
[imageView setImage:delegate.correctedImage];
[super viewDidLoad];
}
Can anybody tell me, what i did wrong ?
My nib file looks:
-File's Owner (Corrected Image Controller)
-First Responder (UIResponder)
-View (UIView)
--ImageView (UIImageView)
The File's owner view property is connected to the view.
And the imageView property is connected to the ImageView.
Can anybody tell me, what i did wrong ?
BR,
Martin
I believe this is because you are calling release on the imageController (line 5) and then trying the pushModalView the object you just released (line 6). If your self.correctedImageViewController is retaining the imageController, you could push the self.correctedImageViewController or release the imageController after the push.
Related
We have a requirement to change UIDocumentInteractionController preview screen? Is it possible to change the rect of UIDocumentInteractionController? I want to open document preview in my custom view?
in creating an AIR Native Extension, I needed to create a view window for my custom view controller.
make sure you are doing:
#import "MyCustomViewController.h"
in my function:
MyCustomViewController *myViewController;
id delegate = [[UIApplication sharedApplication] delegate];
UIWindow *win = [delegate window];
myViewController = [[MyCustomViewController alloc]init];
[win addSubview:myViewController.view];
[myViewController previewDocument: (parameters to method)];
return (_bridge FREObject)(myViewController);
where you implement this may be different depending on your structure. Since I am using it as an ANE, I put it right into the Context function call.
hope it gives you a starting point if you haven't gotten it yet.
I have a problem with the function call:
[self dismissModalViewControllerAnimated:YES];
In MainViewController, I can launch a image picker and dismiss as usual by clicking the cancel button.
(IBAction) LaunchInMain:(id)sender{
MainAppDelegate *app = (MainAppDelegate *)[[UIApplication sharedApplication] delegate];
//elcPicker is a customized image picker
[app.viewController presentModalViewController:elcPicker animated:YES];
[elcPicker release];
[albumController release];
- (void)elcImagePickerControllerDidCancel:(ELCImagePickerController *)picker {
[self dismissModalViewControllerAnimated:YES];
}
Now, instead of launching it direct it in Main, I add a subview first and launch the image picker from the subview using the same launch method.
Problem:
The image picker cannot be dismissed and the subview cannot be shown again. So the screen will remain at the image picker no matter what I click.
I have been trying with some other calls like without any success:
[self dismissModalViewControllerAnimated:YES];
I am happy with any help or idea. If you think more information should be provided, I can add more codes.
May be try
[app.viewController dismissModalViewControllerAnimated:YES];
Hope this helps.
This may work for you:
[self.view dismissModalViewControllerAnimated:YES];
This works if you are presenting a modal view from a UISplitViewController. It can also be applied in so many other ways...
First, create an instance in your .h file for your appDelegate, (AppDelegate_iPad *appDelegate) then put this in your viewDidLoad or comparable method:
ipadDelegate = (AppDelegate_iPad *)[[UIApplication sharedApplication] delegate];
Now, present the first modal view like this:
YOURVC *vc = [[YOURVC alloc] initWithNibName:#"YOURVC" bundle:nil];
[ipadDelegate.splitViewController presentModalViewController:vc animated:YES];
[vc release];
Say you have a subview, like a UITableView, and want to dismiss the modal from the didSelectRowAtIndexPath. All you have to do to dismiss your modal with a subview is create another ipadDelegate instance inside your subview's .h (if needed), reference the [[UIApplication sharedApplication] delegate] again, and dismiss:
[ipadAppDelegate.splitViewController dismissModalViewControllerAnimated:YES];
Essentially, as long-winded as it may be, use your appDelegate's controller to present and dismiss the the modal if you need to maintain a persistent reference to the presentingViewController...because all the things above just don't work in my case.
If you're presenting with your ipadDelegate, make sure you check the mode of presentation in your MainWindow_iPad.xib. Your "Transition Style" should be "Cover Vertical" and "Presentation" should be "Current Context" or your modal may present behind other views.
I need to share data from a "SampleAppdelegate" to two view controller "ContactViewController.m" and "DrinksViewController.m".
In SampleAppdelegate:
#interface SampleAppdelegate : NSObject <UIApplicationDelegate, UITabBarControllerDelegate , UINavigationBarDelegate>
So I've included below code in respective view controller.
In ContactViewController.m:
- (void)viewDidLoad
{
[super viewDidLoad];
SampleAppDelegate *appDelegate = (SampleAppDelegate *)[[UIApplication sharedApplication] delegate];
contactDatabaseObject = (ContactDatabaseObject *)[appDelegate.contactDetails objectAtIndex:0];
NSLog(#"%#", contactDatabaseObject.contactName);
[appDelegate release];
}
In DrinksViewController.m
(void)viewDidLoad
{
[super viewDidLoad];
SampleAppDelegate *appDelegate = (SampleAppDelegate *)[[UIApplication sharedApplication] delegate];
drinksDatabaseObject = (DrinksDatabaseObject *)[appDelegate.drinkDetails objectAtIndex:0];
NSLog(#"%#", drinksDatabaseObject.drinkName);
[appDelegate release];
}
The problem is "sharing application delegate is is both of the code not working at the same time. ( that is, if I comment above in a view controller then other is working fine as as expected).
Actually i'm using a tab-bar with two item as above viewControllers. So loading of the first controller happens fine. But when i click the second view controller the iphone-simulator is terminated with any warning. ( And at the same time the code works normal if I comment it in any one of the view controller). Please help me to resolve above issues or suggest a method to accomplish above feature.
Thanks in advance !
You should read ...
http://developer.apple.com/library/mac/#documentation/cocoa/conceptual/MemoryMgmt/MemoryMgmt.html
You're not owner of appDelegate, no need to release it.
P.S. If you're asking for help and writing something about warning, you should always copy warning here to shed more light on your problem.
You should not be releasing the appDelegate.
So I have a UIWebView implemented in one .m file and a UITableView implemented in another. When a user clicks UITableView element, the UIWebView appears. The problem is that I have to set UIWebView's content (local text and images) depending on the UITableView's row number. I know how to do this, but this, of course must be implemented with the UITableView but it also needs UIWebView.
Just importing the UIWebView implementation does'n work.
Thanks in advance!
see this link to for setting delegates here
In didSelectRowAtIndexpath
NSString *name=#"content of table";
myAppDelegate *appDelegate = (myAppDelegate *) [[UIApplication sharedApplication] delegate];
[appDelegate setCurrentTitle:name];
PictureWebViewController *webview = [[PictureWebViewController alloc] initWithNibName:#"PictureWebViewController" bundle:nil];
[self.navigationController pushViewController:email animated:YES];
the PictureWebViewController is class of your webview .
In that class in viewdidload method get the title as
myAppDelegate *appDelegate = (myAppDelegate *) [[UIApplication sharedApplication] delegate];
NSString *name= [appDelegate getCurrentTitle];
Use the name in this class to display the content in webview.
All the Best
Sorry for the newbie question. I have a UITabBar in my main window view as well as an array of UINavigationControllers for each Tab. The structure is similar to the iPod app in that the main views can be seen by selecting TabBar items and then the user can drill down further with the NavigationController by pushing views to the stack.
What I would like to be able to do is to do the equivalent of pressing a TabBar button at the bottom from any of the subviews in code (i.e., change the selected property of the TabBar and display launch the first view controller for the tab).
Any help would be greatly appreciated.
Dave
[myTabBarController setSelectedIndex:index]
EDIT: Answering the part 2 question from the comment:
You can define a method in AppDelegate for switching to a different tab.
And you can get hold of appdelegate from anywhere and send a message..
something like:
MyAppDelegate *appDelegate = (MyAppDelegate*) [[UIApplication sharedApplication] delegate];
[appDelegate SwitchToTab:index]
alternatively...
[self.parentViewController.tabBarController setSelectedIndex:3];
I'd like to reply to Prakash, but can't figure out how. Maybe I'm blocked until my score goes up.
Anyhow, I hope this helps someone:
I was doing what Prakash said, and nothing was happening. It's because to get a pointer to my app delegate, I was doing this:
AppDelegate_Phone *appDelegate = [[AppDelegate_Phone alloc] init];
When I should have been doing this:
AppDelegate_Phone *appDelegate = (AppDelegate_Phone *) [[UIApplication sharedApplication] delegate];
Newbie mistake.
For this, You just need to take UITabBar controller -
.h File -
UITabBarController *_pTabBarController;
#property (nonatomic, retain) IBOutlet UITabBarController *_pTabBarController;
.m File -
// synthesize it
#synthesize _pTabBarController;
At initial load
// You can write one function to add tabBar -
// As you have already mentioned you have created an array , if not
_pTabBarController = [[UITabBarController alloc] init];
NSMutableArray *localViewControllersArray = [[NSMutableArray alloc] initWithCapacity:4];
UINavigationController *theNavigationController;
_pController = [[Controller alloc] initStart];
_pController.tabBarItem.tag = 1;
_pController.title = #"Baranches";
theNavigationController = [[UINavigationController alloc] initWithRootViewController:_pController];
theNavigationController.tabBarItem.tag = 1;
theNavigationController.tabBarItem.image = [UIImage imageNamed:#"icon_branches.png"];
[localViewControllersArray addObject:theNavigationController];
[theNavigationController release];
than you can set index as per your needs
self._pTabBarController.selectedIndex = 0; // as per your requirements
[self.parentViewController.tabBarController setSelectedIndex:3];
Selected the index for me but it just highlighted the navbarcontroller's index as the active index, but while it highlighted that index it was actually on a different viewcontroller than was suggested by the tabbarmenu item.
Just wanted to add that I used this from my view controller, and it performed like someone actually pressed the menuitem; from code:
UITabBarController *MyTabController = (UITabBarController *)((AppDelegate*) [[UIApplication sharedApplication] delegate]).window.rootViewController;
[MyTabController setSelectedIndex:1];
Thank you for this post/answers it helped out a lot in my project.
I wanted to do something similar but for XCode 6.4 iOS (8.4) setSelectedIndex by itself won't do it.
Add the view controllers of the tab bar to a list and then use something like the following in some function and then call it:
FirstViewController *firstVC = [[self viewControllers] objectAtIndex:0];
[self.selectedViewController.view removeFromSuperview]
[self.view insertSubview:firstVC.view belowSubview:self.tabBar];
[self.tabBar setSelectedItem:self.firstTabBarItem];
self.selectedViewController = firstVC;
You might have similar code already inside your didSelectedItem..
- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
if (item == self.firstTabBarItem)
// Right here
}
else if ...
}