A UITabBarController's viewControllers are navigationController, when I release the tabbarcontroller, I found the memory would not released ?
You cant release them if you create them in .xib file. They will be released then your application end work !!!
If you are working in code you probably need to release the navigationControllers after adding them to the tabBarController...
tabBarController = [[UITabBarController alloc] init];
NSMutableArray *controllerArray = [[NSMutableArray alloc] initWithCapacity:2];
UINavigationController *localNavigationController;
AccountViewController *accountViewController = [[AccountViewController alloc] init];
localNavigationController = [[UINavigationController alloc] initWithRootViewController:accountViewController];
[controllerArray addObject:localNavigationController];
[localNavigationController release];
[accountViewController release];
AccountHistoryViewController *accountHistoryViewController = [[AccountHistoryViewController alloc] init];
localNavigationController = [[UINavigationController alloc] initWithRootViewController:accountHistoryViewController];
[controllerArray addObject:localNavigationController];
[localNavigationController release];
[accountHistoryViewController release];
[tabBarController setViewControllers:controllerArray];
[controllerArray release];
you should release them in dealloc method of app delegate class
- (void)dealloc {
[tabbarcontroller release];
[window release];
[super dealloc];
}
Related
When i click on back button then Im loading a particular view.But to that particular view I have to add a tabbarController.How can i do it..?When i try to add it doesnot get added..Couldnot understand y ?
-(IBAction)switchtofirst {
AppViewController *first=[[AppViewController alloc] initWithNibName:#"AppViewController" bundle:nil];
Login *second=[[Login alloc]initWithNibName:#"Login" bundle:nil];
second.title=#"Login";
NSArray *viewArray=[[NSArray alloc] initWithObjects: first,second,nil];
tabBarController=[[UITabBarController alloc] init];
[tabBarController setViewControllers:viewArray animated:NO];
AppViewController *gp=[AppViewController alloc];
[gp.view addSubview:tabBarController.view];
[self presentModalViewController:gp animated:NO];
[gp release];
}
Try something like this:
-(IBAction)switchtofirst {
AppViewController *first = [[AppViewController alloc] initWithNibName:#"AppViewController" bundle:nil];
Login *second=[[Login alloc]initWithNibName:#"Login" bundle:nil];
second.title=#"Login";
NSArray *viewArray= [NSArray arrayWithObjects:first, second, nil];
tabBarController=[[UITabBarController alloc] init];
[tabBarController setViewControllers:viewArray animated:NO];
[self presentViewController:tabBarController animated:YES completion:nil];
}
I want to add multiple Controllers that are same instance to my tabBarController.but I can't.the added controllers of array treated as a one controller. How I should do ??and What is the best way??this is my code.
RootViewController *rootViewController = [[[RootViewController alloc]init]autorelease];
tabBarController = [[[UITabBarController alloc]init]autorelease];
[tabBarController setDelegate:self];
[tabBarController setViewControllers:[NSArray arrayWithObjects:rootViewController,rootViewController,rootViewController,rootViewController,rootViewController,nil] animated:NO];
You could try this :
RootViewController *rootViewController = [[[RootViewController alloc]init]autorelease];
RootViewController *rootViewController2 = [rootViewController retain];
RootViewController *rootViewController3 = [rootViewController retain];
tabBarController = [[[UITabBarController alloc]init]autorelease];
[tabBarController setDelegate:self];
[tabBarController setViewControllers:[NSArray arrayWithObjects:rootViewController, rootViewController2, rootViewController3, nil] animated:NO];
I'm trying to find a memory leak i have on my app. When the application loads i instantly get a memory leak that looks like that in instuments
how can i debug that ? it doesn't reproduce it self no matter how long i run my app or what i do, only when the applications loads.
and here is my code in the delegate
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
tabBarController = [[UITabBarController alloc] init];
search = [[iPhoneView alloc] initWithNibName:#"iPhoneView" bundle:nil];
homeNavigationController = [[UINavigationController alloc] initWithRootViewController:search];
favouritesNavigationController = [[UINavigationController alloc] init];
favoritesViewController = [[FavoritesViewController alloc]init];
[favouritesNavigationController pushViewController:favoritesViewController animated:NO];
aboutUsViewController =[[AboutUsViewController alloc] init];
UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:#"toolbox" image:[UIImage imageNamed:#"aboutus"] tag:0];
aboutUsViewController.tabBarItem = item;
[item release];
UITabBarItem *item2 = [[UITabBarItem alloc] initWithTitle:#"αγαπημένα" image:[UIImage imageNamed:#"favorites"] tag:0];
favouritesNavigationController.tabBarItem = item2;
[item2 release];
NSArray *tabBarControllerCollection = [NSArray arrayWithObjects:homeNavigationController,favouritesNavigationController,aboutUsViewController,nil];
[tabBarController setViewControllers:tabBarControllerCollection animated:NO];
[window setRootViewController:tabBarController];
[tabBarControllerCollection release]; //added that for the leaks
//[window addSubview:tabBarController.view]; for the warning thing about window and root view controller
[window makeKeyAndVisible];
}
- (void)dealloc {
[tabBarController release];
[search release];
[favoritesViewController release];
[favouritesNavigationController release];
[aboutUsViewController release];
[window release];
[super dealloc];
}
Please use the Call Tree view of your Leaks, that will show where the problem happened and will help you troubleshoot. Also try with a real device as the simulator might show false-positives.
Release homeNavigationController which not released and check if you are missing somewhere else.
I have an UIViewController class(Say it is XXX). I present this view controller as modally by the code..
XXX *xxx = [ [XXX alloc] init];
[self presentModalViewController:xxx animated:YES];
[xxx release];
I want to add a navigation bar on the top of the XXX view. So I used UINavigationBar object in XXX's loadView method.
UINavigationBar *navBar = [ [UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
[self.view addSubview:navBar];
[navBar release];
But, It throws an error as "EXC_BAD_ACCESS". Any help...?
Thanks
OPTION-1:
Try adding navigation bar from the XIB of viewController called XXX.
OPTION-2:
Add a UINavigationController and present it modally.
Replace your code :
XXX *xxx = [[XXX alloc] init];
[self presentModalViewController:xxx animated:YES];
[xxx release];
with this code:
XXX *xxx = [[XXX alloc] init];
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:xxx];
[self presentModalViewController:navigation animated:YES];
[navigation release];
Hope this helps you.
Replace your code with:
XXX *xxx = [[ [XXX alloc] init]autorelease];
[self presentModalViewController:xxx animated:YES];
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:xxx];
[self presentModalViewController:navigation animated:YES];
[navigation release];
I think it will solve your "EXC_BAD_ACCESS" problem.
you can try this by adding toolbar at the top of the view. In many cases i have seen for poping MODAL controller this is nice solution. but if you want to navigate more controllers from MODAL controller then you should use UINavigationController.
you do it like this:
XXX *xxx = [[XXX alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:xxx];
[self presentModalViewController:navigationController animated:YES];
[xxx release];
[navigationController release];
I currently have my navigation controllers defined in my appDelegate as followed (code summarized):
- (void) applicationDidFinishLaunching {
tabBarController = [[UITabBarController alloc] init];
FlagList *flagList = [[FlagList alloc] initWithApiCall:API_PUBLICTIMELINE andTitle:#"Home"];
UITabBarItem *homeTab = [[UITabBarItem alloc] initWithTitle:#"Home"
image:[UIImage imageNamed:#"home.png"]
tag:0];
flagList.tabBarItem=homeTab;
[homeTab release];
tabBarController.viewControllers=[NSArray arrayWithObjects:flagList,nil];
[flagList release];
[rootViewController release];
rootViewController = [[UINavigationController alloc] initWithRootViewController:[tabBarController autorelease]];
rootViewController.navigationBar.barStyle=UIBarStyleDefault;
}
I want to set a title in the navigationBar of my FlagListView. HOWEVER, I want to be able to do this in the -viewDidLoad method of my FlagList UITableViewController class. How can I access this property?
I tried:
[[self navigationItem] setTitle:#"Home"];
..but it doesn't seem to work. Can someone please tell me what I'm doing wrong?
Assuming FlagList is a descendant if ViewController use [self setTitle:#"Home"] instead of [[self navigationItem] setTitle:#"Home"];
[self setTitle:#"Home"];
This should work.