I am a very inexperienced developer and have run into a problem that should be easy however after hours of reading over Apple's Developer guide and many different questions on this site I am still stumped.
All I am trying to do is transition from my root view controller to my next view controller via a UIButton.
Here is appdelegate.h:
#import <UIKit/UIKit.h>
#class MainViewController;
#interface MDAppDelegate : NSObject <UIApplicationDelegate> {
UIWindow *window;
UINavigationController *navigationController;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
#end
Important stuff from Appdelegate.m:
#import "MDAppDelegate.h"
#import "MainViewController.h"
#implementation MDAppDelegate
#synthesize window, navigationController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions (NSDictionary *)launchOptions
{
// Override point for customization after application launch.
[window addSubview:navigationController.view];
[self.window makeKeyAndVisible];
return YES;
}
MainViewController.h:
#import <UIKit/UIKit.h>
#interface MainViewController : UIViewController {
UIButton *cityButton;
}
#property (nonatomic, retain) IBOutlet UIButton *cityButton;
- (IBAction)chooseCityAction:(id)sender;
#end
And finally, MainViewController.m:
#import "MainViewController.h"
#import "DailyDealViewController.h"
#implementation MainViewController
#synthesize cityButton;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
}
return self;
}
- (void)dealloc
{
[cityButton release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
UIBarButtonItem *temporaryBarButtonItem = [[UIBarButtonItem alloc] init];
temporaryBarButtonItem.title = #"Back";
self.navigationItem.backBarButtonItem = temporaryBarButtonItem;
[temporaryBarButtonItem release];
}
- (void)viewDidUnload
{
[self setCityButton:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)chooseCityAction:(id)sender {
DailyDealViewController *dailyDealViewController = [[DailyDealViewController alloc]initWithNibName:#"DailyDealViewController" bundle:nil];
[dailyDealViewController release];
[self.navigationController pushViewController:dailyDealViewController animated:YES];
}
#end
Here is the error:
2011-10-03 21:56:14.258 MD[4235:207] *** Terminating app due to uncaught exception
'NSUnknownKeyException', reason: '[<UIViewController 0x4b434c0>
setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key
cityButton.'
I would love to know what I missing.
You have released dailyDealViewController before pushing it. Move the release statement to after the pushViewController statement.
Related
I need a little help here, I've loaded a view by modal and basically I'm now trying to dismiss this view now but it keep crashing after the view goes.
It says * -[PointInfoController endAppearanceTransition]: message sent to deallocated instance 0x74d5e90
Below is the .H file:
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
#class PointInfoController;
#protocol PointInfoDelegate
- (void)PointInfoDidFinish:(PointInfoController*)PointInfoController;
#end
#interface PointInfoController : UIViewController <UIScrollViewDelegate>
{
IBOutlet UIScrollView *scrollView;
IBOutlet UIImageView *thumbnailView;
IBOutlet UIButton *Dismiss;
id<PointInfoDelegate> delegate;
}
#property (retain) id<PointInfoDelegate> delegate;
#property (retain, nonatomic) IBOutlet UITextView *description;
#property (retain, nonatomic) IBOutlet UIScrollView *scrollView;
#property (retain, nonatomic) IBOutlet UIImageView *thumbnailView;
- (IBAction)DismissView:(id)sender;
#end
Below is the .M file:
#import "PointInfoController.h"
#import "LockOnLocation.h"
#implementation UIScrollView (AutoContentSize)
- (void) setAutosizeContent:(BOOL)autosizeContent {
if (autosizeContent) {
CGFloat contentWidth =
self.frame.size.width == self.superview.frame.size.width ?
self.superview.frame.size.width :
self.frame.size.width + 10;
CGFloat contentHeight =
self.frame.size.height == self.superview.frame.size.height ?
self.superview.frame.size.height :
self.frame.size.height + 164;
self.contentSize = CGSizeMake(contentWidth, contentHeight);
}
}
#end
#implementation PointInfoController
#synthesize description;
#synthesize scrollView;
#synthesize thumbnailView;
#synthesize delegate;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView
{
}
*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
self.scrollView.delegate = self;
[super viewDidLoad];
}
- (void)viewDidUnload
{
[self setDescription:nil];
[scrollView release];
scrollView = nil;
[self setScrollView:nil];
[self setThumbnailView:nil];
[thumbnailView release];
thumbnailView = nil;
[Dismiss release];
Dismiss = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (IBAction)DismissView:(id)sender
{
[self dismissModalViewControllerAnimated:YES];
[self release];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (void)dealloc {
[description release];
[scrollView release];
[thumbnailView release];
[Dismiss release];
[super dealloc];
}
#end
I'm new to all this and I spent quite a few days on the same problem. Blamed everything but myself! I discovered I was inadvertently release(ing) the instance referred to. In my case I had put the instance into a SSLConnectionRef and CFRelease'd it. I'm not sure why you are having the issue looking at your code. In any event, I thought your compiler would complain about your [instance release] methods, since these are no longer allowed. You are having the problem because both you and the system are releasing the instance. You need to get rid of your release and all will be well.
I want to pass data from second tab to first tab using delegates.But delegate method not triggered.here is the code (I m using storyboard)
in SecondViewController.h
#import <UIKit/UIKit.h>
#class SecondViewController;
#protocol SecondViewControllerDelegate <NSObject>
-(void) sliderValueDidChanged: (SecondViewController *)controller data:(float) sliderValue;
#end
#interface SecondViewController : UIViewController{
__weak id<SecondViewControllerDelegate> delegate;
}
- (IBAction)sliderPressed:(id)sender;
#property (weak, nonatomic) IBOutlet UISlider *mySlider;
#property(weak,nonatomic) id<SecondViewControllerDelegate> delegate;
#end
in SecondViewController.m
#import "SecondViewController.h"
#interface SecondViewController ()
#end
#implementation SecondViewController
#synthesize mySlider;
#synthesize delegate;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)viewDidUnload
{
[self setMySlider:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)sliderPressed:(id)sender {
float value = mySlider.value;
[self.delegate sliderValueDidChanged:self data:value];
NSLog(#"%#",self.delegate);
}
#end
FirstViewController.h
#import <UIKit/UIKit.h>
#import "SecondViewController.h"
#interface FirstViewController : UIViewController<SecondViewControllerDelegate>
#property (weak, nonatomic) IBOutlet UILabel *myLabel;
#end
in FirstViewController.h
#import "FirstViewController.h"
#interface FirstViewController ()
#end
#implementation FirstViewController
#synthesize myLabel;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
SecondViewController *svc = [[SecondViewController alloc]init];
svc.delegate = self;
}
- (void)viewDidUnload
{
[self setMyLabel:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
-(void) sliderValueDidChanged: (SecondViewController *)controller data:(float) sliderValue{
myLabel.text = [[NSString alloc]initWithFormat:#"%f",sliderValue];
NSLog(#"delegate called");
}
#end
I am trying to set a slider in second tab and send the sider value to first tab which has a label. self.delegate printing null and delegate method never called.
Simply enough, as you already have the delegation code, only change the line where you create a SecondViewController object. Rather than creating a new one, you should have a reference to the one that the tab bar will show.
In the viewDidLoad of FirstViewController,
Change
SecondViewController *svc = [[SecondViewController alloc]init];
to
//assuming you have 2 view controllers in the tab bar controller, first being FirstViewController
SecondViewController *svc = [self.tabBarController.viewControllers objectAtIndex:1];
and that should do it
How do you actually get to the second tab? You're creating an instance of it in viewDidLoad, but if you switch tabs, that instance won't be used to show on screen. The system will create another instance which it'll use. You can access this by accessing the tab bar controller's viewcontrollers property and checking for SecondViewController.
EDIT: You could also question your design. I don't know much about your app, but chances are your first tab shouldn't really be the delegate for your second tab. If you want to pass along data, consider using NSNotificationCenter or persistent storage.
I have problem with UIModalTransitionStylePartialCurl when i rotate the device beacuse the curl is not rotating as i expected and i found the below extract of the answer but i am not able to undertsand.
i am not sure how to create a "rootviewcontroller" Property as told like below
So i am looking for your guidence to proceed further .I am really stuck with this thing for long days...
Thanks for any help:-
The SOURCE CODE I HAVE
//
// ModalViewExampleViewController.h
// ModalViewExample
//
// Created by Tim Neill on 11/09/10.
//
#import <UIKit/UIKit.h>
#interface ModalViewExampleViewController : UIViewController {
UIButton *showDefaultButton, *showFlipButton, *showDissolveButton, *showCurlButton;
}
#property (nonatomic, retain) IBOutlet UIButton *showDefaultButton, *showFlipButton, *showDissolveButton, *showCurlButton;
- (IBAction)showDefault:(id)sender;
- (IBAction)showFlip:(id)sender;
- (IBAction)showDissolve:(id)sender;
- (IBAction)showCurl:(id)sender;
#end
//
// ModalViewExampleViewController.m
// ModalViewExample
//
// Created by Tim Neill on 11/09/10.
//
#import "ModalViewExampleViewController.h"
#import "SampleViewController.h"
#implementation ModalViewExampleViewController
#synthesize showDefaultButton, showFlipButton, showDissolveButton, showCurlButton;
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
- (IBAction)showDefault:(id)sender {
SampleViewController *sampleView = [[[SampleViewController alloc] init] autorelease];
[self presentModalViewController:sampleView animated:YES];
}
- (IBAction)showFlip:(id)sender {
SampleViewController *sampleView = [[[SampleViewController alloc] init] autorelease];
[sampleView setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
[self presentModalViewController:sampleView animated:YES];
}
- (IBAction)showDissolve:(id)sender {
SampleViewController *sampleView = [[[SampleViewController alloc] init] autorelease];
[sampleView setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
[self presentModalViewController:sampleView animated:YES];
}
- (IBAction)showCurl:(id)sender {
SampleViewController *sampleView = [[[SampleViewController alloc] init] autorelease];
sampleView.rootViewController = self;
[sampleView setModalTransitionStyle:UIModalTransitionStylePartialCurl];
[self presentModalViewController:sampleView animated:YES];
}
- (void)dealloc {
[showDefaultButton release];
[showFlipButton release];
[showDissolveButton release];
[showCurlButton release];
[super dealloc];
}
#end
//
// SampleViewController.h
// ModalViewExample
//
// Created by Tim Neill on 11/09/10.
//
#import <UIKit/UIKit.h>
#class RootViewController;
#interface SampleViewController : UIViewController {
RootViewController *rootViewController;
UIButton *dismissViewButton;
}
#property (nonatomic, retain) IBOutlet UIButton *dismissViewButton;
#property (nonatomic, retain) RootViewController *rootViewController;
- (IBAction)dismissView:(id)sender;
#end
//
// SampleViewController.m
// ModalViewExample
//
// Created by Tim Neill on 11/09/10.
//
#import "SampleViewController.h"
#implementation SampleViewController
#synthesize rootViewController;
#synthesize dismissViewButton;
- (IBAction)dismissView:(id)sender {
[self dismissModalViewControllerAnimated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
[super viewDidUnload];
}
- (void)dealloc {
[dismissViewButton release];
[super dealloc];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
[self dismissModalViewControllerAnimated:YES];
return YES;
}
#end
UIView Animation: PartialCurl ...bug during rotate?
I too had this issue and somewhat gave up. However, I mentioned my
dilemma to a friend, who encouraged me to look into the child VC's
logic and I recalled a handy trick that I've used to pass data between
parent/child view controllers.
In your flipside view controller, create a "rootViewController"
property. In your parent view controller, when you initialize the
flipside view controller, you set (where "self" is the rootVC):
flipsideController.rootViewController = self;
You then use this for your flipside VC's
shouldAutorotateToInterfaceOrientation method:
-
(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{ return interfaceOrientation ==
self.rootViewController.interfaceOrientation;
}
Viola! The flipside view no longer rotates underneath the partially
curled up parent view!
#From the post : In your flipside view controller, create a "rootViewController" property.
#import <UIKit/UIKit.h>
#class ModalViewExampleViewController;
#interface flipSideViewController : UIViewController {
ModalViewExampleViewController *rootViewController;
}
#property (nonatomic, retain) ModalViewExampleViewController *rootViewController;
#end
and in your flipSideViewController's implementation file
#import "ModalViewExampleViewController.h"
#synthesize rootViewController;
Hi I have two viewControllers.
NewsViewController
#import "SingleViewController.h"
#interface NewsViewController : UIViewController {
}
- (NSString *)getFirstImage:(NSString *)htmlString;
#end
and the implementation file:
#import "SingleViewController.h"
SingleViewController *singleViewController;
#interface NewsPadViewController () <UIActionSheetDelegate>
- (void)loadSubscriptions;
#property (nonatomic, assign) BOOL wrap;
#property (nonatomic, retain) NSMutableArray *items;
#end
#implementation NewsPadViewController
....CODE....
- (void)carouselCurrentItemTapped{
//[self addSubview:articolo];
MWFeedItem *item =[reader.feedItems objectAtIndex:[carousel currentItemIndex]];
NSLog(#"Current Item tappped, index: %d", [carousel currentItemIndex]);
singleViewController.prova.text=#"CIAO";
singleViewController.ciao=#"sample";
[singleViewController.web loadHTMLString:item.summary baseURL:nil];
NSLog(#"conternutio:");
NSLog(singleViewController.ciao);
}
SingleViewController.h
#import <UIKit/UIKit.h>
#interface SingleViewController : UIViewController{
#public
UIWebView *web;
UILabel *prova;
NSString *ciao;
}
#property (nonatomic,retain) IBOutlet UIWebView *web;
#property (nonatomic,retain) IBOutlet UILabel *prova;
#property (nonatomic,retain) IBOutlet NSString *ciao;
#end
and SingleViewController.m
#import "SingleViewController.h"
#implementation SingleViewController
#synthesize web,prova,ciao;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[prova setText:ciao];
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end
Why I can't access from NewsPadViewController at object in SingleViewController? Where is my error? thanks
UPADATE
- (void)carouselCurrentItemTapped{
//[self addSubview:articolo];
MWFeedItem *item =[reader.feedItems objectAtIndex:[carousel currentItemIndex]];
NSLog(#"Current Item tappped, index: %d", [carousel currentItemIndex]);
SingleViewController *singleViewController = [[SingleViewController alloc] initWithNibName:#"SingleViewController" bundle:[NSBundle mainBundle]];
singleViewController.prova.text=#"CIAO";
singleViewController.ciao=#"sample";
[singleViewController.web loadHTMLString:item.summary baseURL:nil];
NSLog(#"conternutio:");
NSLog(singleViewController.ciao);
[singleViewController setOpz:#"sample"];
}
I don't see any instantiation of SingleViewController. You have a pointer to it, but I don't see anywhere in your code example where you actually create it.
Somewhere you need something like:
if (!singleViewController) {
singleViewController = [[SingleViewController alloc] init];
}
or
SingleViewController *singleViewController = [[SingleViewController alloc] initWithNibName:#"SingleView" bundle:nil];
or from somewhere else you need to send a message or set an instance variable in NewsViewController that points to an existing instance of SingleViewController.
I want to make multi view application. My goal is when program launch to load first view controller and then when press the button to load new tab bar controller and dismiss first controller. I try myself and I do firt step, but when tab bar controller is loaded it's appear only small tab without any tabs and old controller doesn't disappear.
This is what I've done:
SwitchAppelegate
-- Header file --
#import <UIKit/UIKit.h>
#class SwitchClass;
#interface SwitchAppDelegate : NSObject <UIApplicationDelegate> {
SwitchClass *switchClass;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet SwitchClass *switchClass;
#property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
#property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
#property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;
- (void)saveContext;
- (NSURL *)applicationDocumentsDirectory;
#end
-- Implementation file --
#import "SwitchAppDelegate.h"
#implementation SwitchAppDelegate
#synthesize window=_window;
#synthesize managedObjectContext=__managedObjectContext;
#synthesize managedObjectModel=__managedObjectModel;
#synthesize persistentStoreCoordinator=__persistentStoreCoordinator;
#synthesize switchClass;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
[self.window addSubview:[switchClass view]];
[self.window makeKeyAndVisible];
return YES;
}
SwitchClass
-- Header file --
#import <UIKit/UIKit.h>
#class BlueClass;
#interface SwitchClass : UIViewController {
BlueClass *blueClass;
}
#property (nonatomic, retain) IBOutlet BlueClass *blueClass;
#end
-- Implementation file --
#import "SwitchClass.h"
#import "BlueClass.h"
#implementation SwitchClass
#synthesize blueClass;
-(void) viewDidLoad {
BlueClass *blue = [[BlueClass alloc] initWithNibName:#"BlueClass" bundle:nil];
self.blueClass = blue;
[self.view insertSubview:blue.view atIndex:0];
[blue release];
[super viewDidLoad];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[blueClass release];
[super dealloc];
}
BlueClass
-- Header file --
#class RedClass;
#interface BlueClass : UIViewController {
RedClass *redClass;
}
#property (nonatomic, retain) IBOutlet RedClass *redClass;
-(IBAction) switch: (id) sender;
#end
-- Implementation file --
#import "BlueClass.h"
#import "RedClass.h"
#implementation BlueClass
#synthesize redClass;
-(IBAction) switch: (id) sender {
RedClass *blue = [[RedClass alloc] initWithNibName:#"RedClass" bundle:nil];
self.redClass = blue;
// self.window.rootViewController = self.tabBarController;
[self.view addSubview:blue.view];
[blue release];
[super viewDidLoad];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[redClass release];
[super dealloc];
}
RedClass
-- Header file --
#import <UIKit/UIKit.h>
#interface RedClass : UITabBarController {
}
#end
-- Implementation file --
#import "RedClass.h"
#implementation RedClass
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[super dealloc];
}
First thing is that in the appDelegate you are adding the view of SwitchClass. But SwitchClass is a UIViewController class and not UIView. so instead of that you should add your SwitchClass as a rootController like this:
self.window.rootViewController = self.switchClass;
If I were you I would just use a tab bar template provided by XCode. It will do it for you automatically.