I am getting the following warnings in the code:
Should I just remove all of these methods in the code or what?
#import "ReservationCell.h"
#implementation ReservationCell
#synthesize origin;
#synthesize destination;
#synthesize time_range;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[origin release];
[destination release];
[time_range 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.
}
- (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
Also I am getting this final linker warning, anyone know how to fix it?
All of those warnings are for UIViewController methods. A UITableViewCell is a UIView, so it would not respond wo any of those.
Related
In my Iphone app I have this pb :Application tried to push a nil view controller on target <UINavigationController:
I have a view controller that contains a tableview and I want that if one row is selected an other view controller to be displayed.
Here is my code :
in RecherchePartenaireViewController.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row==3){
NSLog(#"RecherchePartenaireDistanceViewController...");
recherchePartenaireDistanceViewController = [[RecherchePartenaireDistanceViewController alloc] init];
self.recherchePartenaireDistanceViewController=recherchePartenaireDistanceViewController.recherchePartenaireViewController;
[self.navigationController pushViewController:recherchePartenaireDistanceViewController animated:YES];
[recherchePartenaireDistanceViewController release];
}
}
In RecherchePartenaireDistanceViewController.h :
#class RecherchePartenaireViewController;
#interface RecherchePartenaireDistanceViewController : UIViewController {
RecherchePartenaireViewController *recherchePartenaireViewController;
}
#property (nonatomic, retain) IBOutlet RecherchePartenaireViewController *recherchePartenaireViewController;
#end
and in RecherchePartenaireDistanceViewController.m
#import "RecherchePartenaireDistanceViewController.h"
#import "RecherchePartenaireViewController.h"
#implementation RecherchePartenaireDistanceViewController
#synthesize recherchePartenaireViewController;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
[super dealloc];
[recherchePartenaireViewController release];
}
- (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.
}
- (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
Where is the problem? I really can't see it. Please heeelp....
Try to use this:
- (void)dealloc
{
[recherchePartenaireViewController release];
[super dealloc];
}
instead of
- (void)dealloc
{
[super dealloc];
[recherchePartenaireViewController release];
}
I think I see what you're doing but I don't understand what you're trying to achieve! You have a ViewController that contains another view controller?
i.e. RecherchePartenaireDistanceViewController contains a RecherchePartenaireViewController
I assume that as it's an IBOutlet you're populating it using a xib file.
The only thing I can think of is that something is going wrong with the creation of your RecherchePartenaireDistanceViewController in the xib file.
What do you see in the console if you do this :
NSLog(#"controller : %#", recherchePartenaireDistanceViewController);
just before adding it to the navigation controller?
PS
What's the purpose of this line?
self.recherchePartenaireDistanceViewController=recherchePartenaireDistanceViewController.recherchePartenaireViewController;
if RecherchePartenaireDistanceViewController is with xib interface than use following statement while initializing,
recherchePartenaireDistanceViewController = [[RecherchePartenaireDistanceViewController alloc] initWithNibName:#"RecherchePartenaireDistanceViewController" bundle:nil];
than push it to navigation controller.
I'm implementing Mobclix in my app, and when following the instructions, it tells us to properly release and dealloc the adview. It also tells us that when the view appears, you should call refreshAds and when it disappears you should pause refresh ads:
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self.adView resumeAdAutoRefresh];
}

- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.adView pauseAdAutoRefresh];
}
#implementation RootViewController
- (void)viewDidUnload {
[self.adView cancelAd];
self.adView.delegate = nil;
self.adView = nil;
}
- (void)dealloc {
[self.adView cancelAd];
self.adView.delegate = nil;
self.adView = nil;
[super dealloc];
}
#end
My question is that I have a lot of view controllers, so it would be inconvenient to implement these things on each view. Is there anyway I can call these methods in one place and have it work for all views?
What you can do is subclass UIViewController and have all your viewControllers to inherit these things.
So basically you could have AdsViewController.h wich will look like
#import <Foundation/Foundation.h?
#interface AdsViewController: UIViewController {
}
#property (nonatomic, retain) <#AdsViewType#> *adsView;
#end
and your AdsViewController.m will have to look pretty much like this
#import "AdsViewController.h"
#implementation AdsViewController
#synthesize adsView = _adsView;
- (id)init {
self = [super init];
if (self) {
_adsView = [[<#AdsViewType#> alloc] init];
_adsView.delegate = self;
}
return self;
}
- (void)viewDidUnload {
[self.adView cancelAd];
self.adView = nil;
[super viewDidUnload];
}
- (void)dealloc {
[self.adView cancelAd];
self.adsView = nil;
[super dealloc];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self.adView resumeAdAutoRefresh];
}

- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.adView pauseAdAutoRefresh];
}
#end
After this have all your viewControllers to subclass this instead of UIViewController. Hope this helps.
I'm trying to do something really tricky and I'm still stuck at a point. I'm attempting to instance an UIViewController with a Nib file inherited from an other UIViewController with an other Nib file.
The problem is when I instantiate my son UIViewController .
// SonViewController
- (id)initWithNibName:(NSString *)nibNameOrNil
bundle:(NSBundle *)nibBundleOrNil
{
if ((self = [super initWithNibName:nibNameOrNil
bundle:nibBundleOrNil])) {
// Custom initialization.
}
return self;
}
The init method initWithNibName:bundle: should call the super class but it only call its own nib file. In the super class, I tried to override the initWithNibName:bundle: method and put the nibName myself like that :
// MotherViewController
- (id)initWithNibName:(NSString *)nibNameOrNil
bundle:(NSBundle *)nibBundleOrNil
{
if ((self = [super initWithNibName:#"MotherViewController"
bundle:nibBundleOrNil])) {
// Custom initialization.
}
return self;
}
It only init and display the Mother Class and its IB Object. I understand why but I begin thinking it is impossible to do what I want. Any suggestion ?
Edit:
I would use my SonViewController just like that :
SonViewController *son = [[SonViewController alloc]
initWithNibName:#"SonViewController" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:son animated:YES];
[son release];
It should display son and mother IB Object...
Regards,
kl94
Normally, you should only use a specific nib in the init method, and not the initWithNibName:bundle:, for this reason.
#implementation MotherViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
//custom initialization
}
return self;
}
- (id)init {
return [self initWithNibName:#"MotherViewController" bundle:nil];
}
Then, to use the default nib for MotherViewController, you just use [[MotherViewController alloc] init];.
As an alternate, you could define a different initializer in MotherViewController for this reason.
#implementation MotherViewController
- (id)_initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
//custom initialization
}
return self;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
return [self _initWithNibName:#"MotherViewController" bundle:nibBundleOrNil];
}
Then, use a private category interface to tell SonViewController about this method.
//SonViewController.m
#interface MotherViewController (PrivateInit)
- (id)_initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil;
#end
#implementation SonViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
//custom initialization
}
return self;
}
I know this is an old thread, but I just found an incredibly blog post here.
Essentially, you have to iterate through all the views of the parent class and add them as subviews to your child class. Here's how I implemented it in my project:
// ChildViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
[self addSubviewsFromSuperclass];
}
// ParentViewController.h
- (void)addSubviewsFromSuperclass;
// ParentViewController.m
- (void)addSubviewsFromSuperclass
{
UIView *selfView = self.view;
UIView *nibView = nil;
#try
{
nibView = [NSBundle.mainBundle loadNibNamed:NSStringFromClass([self superclass]) owner:self options:nil][0];
}
#catch (NSException *exception)
{
NSLog(#"Something exceptional happened while loading nib:\n%#", exception);
}
self.view = selfView;
for (UIView *view in nibView.subviews)
{
[self.view addSubview:view];
}
}
That addSuviewsFromSuperclass method is not my coding. I have to give full credit to the author of the blogpost I mentioned above. Download his example project and you'll find it in his JMViewController.m.
I can't figure out why it doesn't work as it should when I try to dismiss a popover by clicking on a UIButton which itself is on a the popover to be dismissed, my project crashes...
- (IBAction) cancelButton: (id) sender{
//[self dismissPopoverAnimated:YES];
}
Above is my code for my UIButton
Dont dismiss the popover from within its self. Make a protocol that sends a message to its delegate to then dismiss it. For example, your popover view controller might look like this..
// MyPopoverViewController.h
#protocol MyPopoverDelegate <NSObject>
-(void)didClickCancelButton;
#end
#interface MyPopoverViewController : UIViewController {
}
#property (nonatomic, assign) id<MyPopoverDelegate> delegate;
-(IBAction)cancelButton;
#end
// MyPopoverViewController.m
#import "MyPopoverViewController.h"
#implementation MyPopoverViewController
#synthesize delegate;
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
-(IBAction)cancelButton {
[self.delegate didClickCancelButton];
}
#pragma mark -
#pragma mark Rotation support
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Overriden to allow any orientation.
return YES;
}
#pragma mark -
#pragma mark Memory Management
- (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.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
#end
And then you could use..
// ClassImplementingPopoverController.h
#import <UIKit/UIKit.h>
#import "MyPopoverViewController.h"
#interface ClassImplementingPopoverController : UIViewController <UIPopoverControllerDelegate, MyPopoverDelegate> {
UIPopoverController *myPopoverController;
}
#property (nonatomic, retain) UIPopoverController *myPopoverController;
#end
// ClassImplementingPopoverController.m
#import "ClassImplementingPopoverController.h"
#import "MyPopoverViewController.h"
#implementation ClassImplementingPopoverController
#synthesize myPopoverController;
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return YES;
}
#pragma mark -
#pragma mark MyPopover delegate
-(void)didClickCancelButton {
if ([myPopoverController isPopoverVisible]) {
[myPopoverController dismissPopoverAnimated:YES];
[myPopoverController release];
}
}
#pragma mark -
#pragma mark UIPopoverController delegate
-(void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController {
if (popoverController == myPopoverController) {
[myPopoverController release];
}
}
/* Use something like this to create your popover, just make sure you set the delegate to self so you can receive the messages
NSLog(#"Displaying Popover!");
MyPopoverViewController *detailViewController = [[MyPopoverViewController alloc] initWithNibName:#"MyPopoverViewController" bundle:nil];
[detailViewController setDelegate:self];
// Pass the selected object to the new view controller.
myPopoverController = [[UIPopoverController alloc] initWithContentViewController:detailViewController];
[detailViewController release];
myPopoverController.popoverContentSize = CGSizeMake(500.0, 150.0);
[myPopoverController setDelegate:self];
*/
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
self.myPopoverController = nil;
}
- (void)dealloc {
[myPopoverController release];
[super dealloc];
}
#end
you can use KVC accessing "popoverController" like
[self valueForKey:#"popoverController"]
But it is potentially rejected by AppStore if they detect your code is using their's "private API".
dismissPopoverAnimated is a property on the PopoverController itself, not your custom VC. You are showing an IBAction on 'self', which suggests you are inside your own class here. (Please post more surrounding code if that isn't correct.)
A VC can't get to its enclosing popover directly; you just need to keep a reference to it in the VC that created it so you can hit it with dismiss from there.
You can dismiss a Popover from inside itself, that doesn't crash.
The title of this question should be pretty self explanatory. I am making an app that involves multiple UIImageViews that serve the same purpose. They are merely different sizes. Anyway, I decided that the best solution was to make UIImageView subclasses, link the subcalsses in IB, and work from there. My code should explain this better -
#define kPausedStatePaused 1
#define kPausedStatePlay 2
#import "Game.h"
#import "ScoreSystem.h"
#interface Doctor : UIImageView
{
}
#end
#interface Ground : UIImageView
{
}
#end
#interface Wall : UIImageView
{
}
#end
#interface Electric_Wire : UIImageView
{
}
#end
#implementation Game
/*
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
// Custom initialization
}
return self;
}
*/
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
- (IBAction)pause {
UIAlertView *pause = [[UIAlertView alloc] initWithTitle:#"Pause" message:nil delegate:self cancelButtonTitle:#"Quit" otherButtonTitles:#"Play", nil];
[pause show];
[pause release];
pauseint = kPausedStatePaused;
}
- (void)viewDidAppear {
pauseint = kPausedStatePlay;
}
- (void)loop {
Doctor *doctorview;
Ground *groundview;
if (CGRectIntersectsRect(doctorview, groundview)) {
}
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if ([alertView.title isEqual:#"Pause"]) {
if(buttonIndex == 0)
[self dismissModalViewControllerAnimated:YES];
pauseint = kPausedStatePlay;
}
}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}
- (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.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
#end
Unsurprisingly, Xcode gave me an "incompatible type for CGRectIntersectsRect" error.
You must pass view's frame, not the view's themselves to that function:
CGRectIntersectsRect(doctorview.frame, groundview.frame)