I want to present a ViewController every time the app starts even from background, I have this code:
mainViewController *mainController = [[mainViewController alloc] init];
UIViewController *src = (UIViewController *) self.window.rootViewController;
UIViewController *dst = (UIViewController *) mainController;
[src presentModalViewController:dst animated:YES];
The ViewController loads becuase the keyboard pops up but the screen is black. Anyway thank you!
It's ok I figured it out, I took the View I wanted to load out of the mainstoryboard and put it in a nib and the just used initWithNib.
Related
I'm trying to load a specific UITableViewController as the Detail view of a UISplitViewController when the user selects a cell within the Master view; but having some problems. When i select the cell, it just shows a blank window with out a table view controller.
However if i change the App Delegate to just load the UITableView controller without using the UISplitViewController it works fine, so i know it's a problem with the way i've coded the UISplitViewController.
The view hierachy:
UISplitViewController
-->
UINavigationController
--> UITableViewController (DetailViewController)
UINavigationController
--> UIViewController (ColorViewController)
The user selects a cell in ColorViewController and that should change the DetailViewController.
In AppDelegate.m:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.viewController = [[ViewController alloc] init];
self.window.rootViewController = [self.viewController splitViewController];
[self.window makeKeyAndVisible];
return YES;
}
In ViewController.m:
- (UIViewController *) splitViewController {
// Create the navigation-run root view
ColorViewController *rootVC = [ColorViewController controller];
UINavigationController *rootNav = [[UINavigationController alloc] initWithRootViewController:rootVC];
// Create the navigation-run detail view
DetailViewController *detailVC = [DetailViewController controller];
UINavigationController *detailNav = [[UINavigationController alloc] initWithRootViewController:detailVC];
// Add both to the split view controller
svc = [[UISplitViewController alloc] init];
svc.viewControllers = [NSArray arrayWithObjects: rootNav, detailNav, nil];
svc.delegate = detailVC;
return svc;
}
In ColorViewController.m:
#interface ColorViewController : UITableViewController
...
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UIViewController *controller = (UIViewController *)self.splitViewController.delegate;
TableViewController *tvc = [[TableViewController alloc] init];
[controller.view addSubview:tvc.view];
}
What's the best way to change the Detail view within a UISplitViewController? Should i just add the replacement view to UIViewController like above or is there a better way? Maybe that's the cause of my problem?
Since you have a navigation controller handling the detail side of your split view, your strategy should be to use it to push your new table view controller. When I've done this, I've kept references to both navigation controllers as properties in the app delegate so that I can use one or the other for push operations.
I'm not sure what the real purpose of your ViewController class is but if you move its splitViewController method into the app delegate it would be easier to change the navigation controllers from local variables to properties in a place where they can be easily accessed.
I'm going to answer my own question..
For some reason, in the Master view (ColorViewController), the detail object TableViewController *tvc needs to be declared as an instance variable, not as a variable within a method.
After doing that, it works and displays the table properly.
I don't really understand why though, if anyone would like to try to explain.
Cheers,
I'm coding in Xcode, and i have a problem moving from view to view (xib to xib) My xib-files all have a personal .h and .m file.
this is the code i have:
The code to go from the first view to the quiz view in this case:
-(IBAction)switchviewMainToQuiz:(id)sender {
ViewControllerQuiz *quizView = [[ViewControllerQuiz alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:quizView animated:YES];
}
The code to go back from a view to my first view:
-(IBAction)switchviewQuizToMain:(id)sender {
[self dismissModalViewControllerAnimated:YES];
}
the problem is that the second code just goes back and that gives sometimes an error or a fail in the app. So when i go to other views and then want to go back it often gets stuck. So does someone have an other code to switch the views, or maybe an other solution? Thank You!
I wouldn't create new viewController in IBAction. For me i would do this in this way:
1 Create property with viewController:
#property(nonatomic, strong) UIViewController *quizView ;
2 Synthesize it:
#synthesize quizView = _quizView;
3 Create method:
- (UIViewController *) quizView {
if (_quizView == nil) {
_quizView = [[ViewControllerQuiz alloc] initWithNibName:nil bundle:nil];
}
return _quizView;
}
4 In your IBAction:
-(IBAction)switchviewMainToQuiz:(id)sender {
[self presentModalViewController:self.quizView animated:YES];
}
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'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.
I have an app, inside that an UIViewController is attached on the UIWindow.
on the view of UIViewController, i have added a button and a uiview_1 of size 100x80.
this uiview_1 contains another uiview_2 as subview of same size and this uiview_2 contains a UIImageView or a UIlable at runtime (both UIImageView and UIlable are userinteraction enabled)
now on the touch/click of UIImageView, i want to show a new view using presentModalViewController, the problem is the view is shown and using back button on the navigation bar i come to the previous/main screen.
here the problem come in picture, now i am unable to touch the button or the UIImageView.
both are not responding, but app is not crashed and nor frozen.
what is wrong in that?
Plz help in this...
----- EDIT:
Approach First:
SWVController *swvController = [[SWVController alloc] init];
UINavigationController *viewNavController = [[UINavigationController alloc] initWithRootViewController:swvController];
UIViewController *pushController = [[UIViewController alloc] init];
UIWindow *win = [[UIApplication sharedApplication] keyWindow];
[win addSubview:pushController.view];
[pushController presentModalViewController:viewNavController animated:YES];
In the swvController i have back button that calls the dismissModelViewController on click >> result is the Main screen ctrls are not responding to touch – sandy 3 hours ago
Second approach:
SWVController *swvController = [[SWVController alloc] init];
UINavigationController *viewNavController = [[UINavigationController alloc] initWithRootViewController:swvController];
UIViewController *pushController = [[UIViewController alloc] init];
[self addSubview:pushController.view];
[pushController presentModalViewController:viewNavController animated:YES];
In the swvController i have back button that calls the dismissModelViewController on click >> result is the swvController's back button on navbar is not responding – sandy 3 hours ago
3rd approach:
SWVController *swvController = [[SWVController alloc] init];
UINavigationController *viewNavController = [[UINavigationController alloc] initWithRootViewController:swvController];
SampleAppAppDelegate *appdel = [[UIApplication sharedApplication] delegate]; [appdel.viewController presentModalViewController:viewNavController animated:YES];
>> result is working fine, but the problem is i dont want to use SampleAppAppDelegate,i want to give my small Uiview (100x80) as a ctrl to other person , where my ctrl will not able to get the AppDelegate of thet app at run time. – sandy 3 hours ago
Call this method when you want to present the modal view controller:
- (IBAction)showInfo {
FlipsideViewController *controller = [[FlipsideViewController alloc] initWithNibName:#"FlipsideView" bundle:nil];
controller.delegate = self;
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:controller animated:YES];
[controller release];
}
Add this method to your self:
- (void)flipsideViewControllerDidFinish:(FlipsideViewController *)controller {
[self dismissModalViewControllerAnimated:YES];
}
Use a toolbar or other button and connect it to this method in your modal view controller:
- (IBAction)done {
[self.delegate flipsideViewControllerDidFinish:self];
}
All code comes from Apple.
How did you handled click/touch on UIImageView? TouchesBegan/Ended?
Try putting some logs (NSLog) and run your app in debug mode (put some breakpoints) to see if control reaches your action method...
Also, when you do presentModalViewController, you do not need to POP out with back button on navigation bar... you only need to dismissModelViewController to hide it.