I created a game in Xcode and now I decided to add a menu to it, the menu is the first loading view so I changed
self.viewController = [[[ViewController alloc] initWithNibName:#"ViewController" bundle:nil] autorelease];
to:
self.viewController = [[[MenuViewController alloc] initWithNibName:#"MenuViewController" bundle:nil] autorelease];
now the view where my game is, is: ViewController.m and from the menu I go there with:
-(IBAction)gogame:(id)sender {
UIViewController *Game = [[UIViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:Game animated:YES];}
Because I needed to give the ViewController.m a name I changed in .h and .m:
#interface ViewController to #interface GameViewController in .h
and #implementation ViewController to #implementation GameViewController in .m
Now I made the button in menu "gogame" run it, and when I click the button it goes from the menu to a black screen, it doesn't crash or anything It only shows the status bar and a black screen. the only issue that xCode gives me is in app delegate: incompatible pointer types assigning to 'GameViewController *' from 'MenuViewController *'.
I do not know why this is not working And I hope someone could exlain me and tell me how to solve this. thanks
UIViewController alone is nothing useful, it's provided to have behavior added to, so in your method:
Here's your version of this method:
-(IBAction)gogame:(id)sender {
UIViewController *Game = [[UIViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:Game animated:YES];
}
and it is doing exactly what you are telling it to, present a framework provided UIViewController. You haven't added any extra behavior or a custom view.
I'm having trouble totally interpreting your current code setup, but it sounds like your new class GameViewController is what you want to show, so change it to:
-(IBAction)gogame:(id)sender {
GameViewController *Game = [[[GameViewController alloc] initWithNibName:#"GameViewController" bundle:nil] autorelease];
[self presentModalViewController:Game animated:YES];
}
Based on your renaming/refactoring of the class name, I wasn't sure what the name of your xib file for the controller is. Is it the original "ViewController" or did you also update that to "GameViewController" (like you should)?
Regarding the warning, where are you creating and assigning a GameViewController?
Related
I have page-based app. On each page I have 3 uibuttons at the top, uiscrollview with alphabet (uibuttons to sort data in uitable) at the right and uitableview at the center. How to show cell's detail view? If it is necessary to add uinavigationcontroller I can't do this. If I adds it, it disables interaction with my table, buttons and scrollview.
And another question is how to show new data in tableview and scrollview when goes to next page??
I have rootViewController class and DataViewController class.
rootViewController listing:
#interface RootViewController ()
#property (readonly, strong, nonatomic) ModelController *modelController;
#end
#implementation RootViewController
#synthesize pageViewController = _pageViewController;
#synthesize modelController = _modelController;
#synthesize navContr = _navContr;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// Configure the page view controller and add it as a child view controller.
//[self presentModalViewController:navContr animated:YES];
self.pageViewController = [[[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil] autorelease];
self.pageViewController.delegate = self;
DataViewController *startingViewController = [self.modelController viewControllerAtIndex:0 storyboard:self.storyboard];
NSArray *viewControllers = [NSArray arrayWithObject:startingViewController];
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:NULL];
self.pageViewController.dataSource = self.modelController;
[self addChildViewController:self.pageViewController];
[self.view addSubview:self.pageViewController.view];
self.navContr = [[UINavigationController alloc] initWithRootViewController:self.pageViewController];
[self.view addSubview:self.navContr.view];
// Set the page view controller's bounds using an inset rect so that self's view is visible around the edges of the pages.
CGRect pageViewRect = self.view.bounds;
self.pageViewController.view.frame = pageViewRect;
[self.pageViewController didMoveToParentViewController:self];
// Add the page view controller's gesture recognizers to the book view controller's view so that the gestures are started more easily.
self.view.gestureRecognizers = self.pageViewController.gestureRecognizers;
for (UIGestureRecognizer *recognizer in self.pageViewController.gestureRecognizers){
if ([recognizer isKindOfClass:[UITapGestureRecognizer class]]){
[recognizer setEnabled:NO];
}
}
}
After few manipulations it works but I need help to get it work fine!
So now it looks like this
Next question: how do I remove the brown space at the top???
::UPDATE::
Problem solved. It needs just to set y-axis position of UINavigationController to -20 ;)
i'm not sure if this link about creating navigation-based project may help you.. (http://iosmadesimple.blogspot.com/2012/08/navigation-based-project-doing-it.html)
From that tutorial, there's a class called SampleViewController, subclass of UIViewController. You might want to put a tableView in SampleViewController.xib file. Then in your SampleViewController.h file, add an IBOutlet UITableView* yourTable property and synthesize it. Connect it to your tableView in your .xib file. //Or you may do it programmatically
in your SampleViewController.h, make your interface header look like this.. I think you already know this...
#interface SampleViewController:UIViewController < UITableviewDelegate, UITableViewDatasource >
in your SampleViewcontroller.m, under viewDidLoad method, set the table delegate and datasource to self:
yourTableView.delegate = self;
yourTableView.datasource = self;
Afterwhich, you implement tableView delegate and datasource methods... //you already know those since you were already able to show a tableview ;)
one of these methods is the "tableview:didSelectAtIndexpath:" --> this is the part wherein you can put your code when you click one of the cells.
Let's assume you have the DetailsViewController Class, this is the class you would like to show after clicking a cell and show its details.
DetailsViewController Class must have a variable that will accept the data you would like to show. Let's say, an NSString *detailsMessage; //do the #property and #synthesize thing...
Let's go back to SampleViewController.m file, under tableview:didSelectAtIndexpath: Method:
inside that Method.. put these codes.
DetailsViewController *detailsVC = [[DetailsViewController alloc] init];
detailsVC.detailsMessage = #"The Data you want to pass.";
[self.navigationController pushViewController:detailsVC animated:YES];
I hope this helps. :(
There may be other ways but by far the easiest way is to use a navigation controller. In fact, it is built to do exactly this.
If you don't want the navigationBar then you can hide it in the viewWillAppear function.
[self.navigationController setNavigationBarHidden:YES animated:YES];
Then you can add an other UIViewController to push when the user selects a cell.
Having read your OP again I'm not sure how you are adding your navigationController.
To use a navigationController you create it and load it at start time. You then create your current viewController (the one with the buttons and table etc...) and set this as the rootViewController of the navigationController.
Then you display the navigationController.
Could you explain how you are adding your navigationController as it may help understand what is going wrong.
Thanks
::EDIT::
OK, my assumption was correct.
The way you are using the navigation controller is not how it was intended.
OK, so at the moment your AppDelegate file will have a method Application didFinishLaunching...
It will look something like this...
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[OJFViewController alloc] initWithNibName:#"MainViewController" bundle:nil];
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}
You should change it so that it is like this...
first add a property to your appDelegate...
#property (nonatomic, strong) UINavigationController *navigationController;
Then change the didFinishLaunchingMethod to this...
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[OJFViewController alloc] initWithNibName:#"MainViewController" bundle:nil];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
This will still show you MainViewController but it will now be contained within a navigationController.
Next in your MainViewController function viewWillAppearAnimated add the line...
[self.navigationController setNavigationBarHidden:YES animated:animated];
This will then hide the navigationBar at the top of the view so you still have access to your buttons.
The you need a new ViewController and xib file (for example DetailViewController).
When the user selects a table row you need to then do something like...
DetailViewController *detailView = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
//pass in details of which row was selected.
[self.navigationController pushViewController:detailView animated:YES];
This will then display your new view and new viewController. You will also need to write a way of passing the data in (set up a property on the DetailViewController).
Hope this helps.
I have a simple app with only location services and 3 (almost empty) different views, and from some reason I can't get from view 1 to view 2 - app crashes and I get an exception. View 1 is the original .xib file, the two others are just views that I added later. It's weird cause I can switch between all of them (1->3, 2->1, 2->3, etc..) just not from 1->2.
I use this code in #1 view controller m. file:
- (IBAction) switchToMaps : (id)sender //this is the one that doesnt work
{
MyMap *mapsView = [[MyMap alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:mapsView animated:YES];
}
- (IBAction) switchToThird : (id)sender
{
ThirdView *third = [[ThirdView alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:third animated:YES];
}
and as another example, here is the code from the 2nd view controller (MyMaps.m):
- (IBAction) switchBack : (id)sender
{
LastLocationViewController *firstView = [[LastLocationViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:firstView animated:YES];
}
- (IBAction) switchFront : (id)sender
{
ThirdView *lastView = [[ThirdView alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:lastView animated:YES];
}
I know it's super vague, but any ideas what can cause this? I have no idea how to debug this...I even put breakpoints at the beginning of each IBAction method, and when it crashes, it doesnt even stop there....before I added this code, this app (which has only location) worked totally fine.
Any ideas?? Thanks!!
if your view does not load from any nib file then you should do like
MyMap *mapsView = [[MyMap alloc] init];
and
ThirdView *lastView = [[ThirdView alloc] init];
and in your back method
- (IBAction) switchBack : (id)sender
{
// LastLocationViewController *firstView = [[LastLocationViewController alloc] initWithNibName:nil bundle:nil]; // because you are allocating new memory to your last view
// [self presentModalViewController:firstView animated:YES];
[self dismissModalViewControllerAnimated:YES];
}
- (IBAction) switchFront : (id)sender
{
// ThirdView *lastView = [[ThirdView alloc] initWithNibName:nil bundle:nil];
// [self presentModalViewController:lastView animated:YES];
[self dismissModalViewControllerAnimated:YES];
}
My hunch is that you're throwing an exception because
MyMap *mapsView = [[MyMap alloc] initWithNibName:nil bundle:nil];
is failing to load a nib. Without seeing your console output it's impossible to say for sure. So a few things to try:
Comment out [self presentModalViewController:mapsView animated:YES];, see if it still crashes.
Explicitly name the nib you expect to load. The nib loader assumes the nib is named exactly the same as the view controller if you pass in nil. So if you don't have a match, you'll end up with an exception (Like this [[MyMap alloc] initWithNibName:#"NibNameWithoutExtension" bundle:nil];)
Set a breakpoint at [self present... and then hover your mouse over "mapsView" after execution pauses. If the popup thing shows you mapsView is nil, you know your trouble is trying to pass a nil object to -presentModalViewController:animated:. If your breakpoint never hits because you throw an exception first, well, there you go, the trouble is a line above.
edit:
One more thing. If your nib has a button that's wired to an action that no longer exists, that would definitely get you in trouble. Inspect each button and make sure no actions are labeled in yellow, indicating a mismatch between the button's target and the actions it's reporting to IB. This would definitely account for the breakpoint behavior you described.
I'm trying to use a UINavigationController but I'm uncertain how. Up till now (for about a year), I've been using presentModalViewController and dismissModalViewController to present/dismiss view controllers.
So, this is what I did. My main view controller (the first one that shows on launch) is called MainViewController, and it extends UIViewController.
So I made this launch function in my app delegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
MainViewController *controller = [[MainViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:controller];
[self.window addSubview:navigationController.view];
[self.window makeKeyAndVisible];
return YES;
}
And in my MainViewController's viewDidLoad method:
- (void)viewDidLoad {
[super viewDidLoad];
self.title = #"Title";
self.navigationController.navigationBar.tintColor = [Constants barColor];
....more code...
}
But, in my MainViewController, I'd like to present another view controller called SecondViewController, which needs a UINavigationBar with a back arrow button. So do I make SecondViewController extend UIViewController and do the same thing by setting the title and backButton in the viewDidLoad method? And how do I present it? What should I do to accomplish this?
You'll need to set a root view controller up, it's easiest starting from the apple template.
Here's where the magic happens:
UIViewController *controller = [[UIViewController alloc] initWithNibName:#"MyNib" bundle:nil];
[self.navigationController pushViewController:controller animated:YES];
[controller release];
The nav controller does all the work for you (back buttons, titles, animations) - it keeps track!
My workflow is this:
Setup MutableArray in the viewDidLoad, add controllers to it, e.g:
NSMutableArray *array = [[NSMutableArray alloc] init];
MyCustomViewController *customView = [[MyCustomViewController alloc] initWithNibName:#"nib" bundle:#"nil"];
customView.title = #"Second Level";
[array addObject:customView];
self.controllers = array;
Then in your delegate:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSUInteger row = [indexPath row];
UIViewController *childControllerToBe = [controllers objectAtIndex:row];
[self.navigationController pushViewController:childControllerToBe animated:YES];
}
This, along with a lot more can be learnt by reading a decent beginner book such as Beginning iPhone Development
Also, apple docs are always good :)
UINavigationController is a subclass of UIViewController, but unlike UIViewController it’s not usually meant for you to subclass. This is because navigation controller itself is rarely customized beyond the visuals of the nav bar. An instance of UINavigationController can be created either in code or in an XIB file with relative ease.
Please visit "How to add UINavigationController Programmatically"
You should Push it onto the navigation stack.
This Lecture by Stanford's iPhone Course will teach you a lot about Navigation Bars. (It's a quick read)
Basically at the heart of it you need this code:
[self.navigationController pushViewController:SecondView];
You can use PopViewController to go back programmatically, but the Back Button is automatically created.
Here's some source code from the Lecture. It covers exactly what you are having issues with.
So I feel like a serious rookie right now, but I have a problem I can't seem to figure out. I have a barebones app, with literally nothing in it except a login screen and a second view containing a tableview. When I add the second view after logging in (I have done this like 4 times before...), the table view goes through its delegates and appears that it's going to load, but something happens. I have enabled my NSZombies, and it appears to be deallocating the new view, right before it appears.
After tracing through it, and building up again piece by piece, it appears to happen after I wire the table to the view as the datasource/delegate in IB. I have set the view as a UITableViewDelegate, and the methods indeed get fired. Does anyone have any idea what might be causing this behavior?
Have you added the 'second'view to an exisitng view using addSubview: or added it to some form of UINavigationController or UITabBarController? When you do this it will automatically increase the retain count and whatever code you have releasing the view won't cause is to be deallocated.
In my AppDelegate application:didFinishLaunchingWithOptions I have something like;
LoginViewController *login = [[LoginViewController alloc] init];
[login setDelegate:self];
loginNavController = [[UINavigationController alloc]
initWithRootViewController:login];
[window addSubview:[loginNavController view]];
And then once login has occured (and succeeded using a protocol/delegate to send the message back to AppDelegate) I call this code;
UIViewController *newView1 = [[UIViewController alloc] init];
UIViewController *newView2 = [[UIViewController alloc] init];
UIViewController *newView3 = [[UIViewController alloc] init];
myTabBarController = [[UITabBarController alloc] init];
myNavController = [[UINavigationController alloc]
initWithRootViewController:newView1];
// nav controller now retaining
[newView1 release];
NSArray *viewControllers = [NSArray arrayWithObjects:myNavController,
newView2,
newView3,
nil];
[myTabBarController setViewControllers:viewControllers animated:YES];
[[myTabBarController view] setFrame:[[UIScreen mainScreen] applicationFrame]];
[window addSubview:[tabBarController view]];
// tab bar controller now retaining
[newView2 release];
[newView3 release];
// remove login from application
[[loginNavController view] removeFromSuperview];
The AppDelegate has the following declared in the header file;
LoginViewController *loginViewController;
UITabBarController *myTabBarController;
UINavigationController *myNavController;
In the dealloc method for the AppDelegate these are released.
This gives me my login page and then when that has processed my views with a top nav all controlled using the bottom tab bar.
Hope this helps in some way.
You have either too many release (or autorelease) calls - or not enough retain calls - in your view loading/transitioning code, but it's impossible to be more specific without seeing that code.
What's probably happening is the autorelease pool is being flushed between your view loading and your view being shown, and that's what's leading the behaviour you describe.
I've been attempting to figure this out for a while now, but I'm up to a point where I can't seem to solve my problem from reading other Q&As. I'm trying to get the active UIViewController in a UINavigationController to send popViewController/pushViewController messages to the UINavigationController, but I cannot figure it out. I'm probably doing something rather stupid that is causing it to break. The structure should be like this, but even then I'm not sure if I've done that right.
mainController
primaryNavigationController
firstViewController
secondViewController
both firstViewController and secondViewController are a subclass
mainController.m
firstViewController = [[FirstTestViewController alloc] init];
secondViewController = [[FirstTestViewController alloc] init];
primaryNavigationController = [[UINavigationController alloc]
initWithRootViewController:firstViewController];
[primaryNavigationController.view setFrame:CGRectMake(0,0,320i,409)];
[self.view addSubview:[primaryNavigationController view]];
[primaryNavigationController.navigationBar setFrame:CGRectMake(0,0,20,44)];
primaryNavigationController.navigationBar.tintColor = [UIColor blackColor];
How can I tell primaryNavigationController to push/pop a VC from within the firstTestViewController subclass?
You would allocate the second view controller within your first view controller (because you don't need it before):
secondViewController = [[FirstTestViewController alloc] init];
[self.navigationController pushViewController:secondViewController animated:YES];
[secondViewController release];
The SDK includes many sample projects that involve a navigation controller and show you how to do this.