I have an application with 2 views . In the first one I have a button which when I clicked the user should go to the second view. I tried what is explained before here from Karoley , but it does not work . When I click the button nothing happened?
Here is the code of my action :
-(IBAction)gotoSecondPage:(id) sender{
NSLog(#"In gotoSecondPage");
LeoActionViewController *aSecondPageController =
[[LeoActionViewController alloc]
initWithNibName:#"LeoActionViewController"
bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:aSecondPageController animated:YES];
}
LeoActionViewCOntroller is a controler for a second view.
It just do not switch to a second view. I do not know why
I put code your problem this will help you. First of all, you declare method and open .xib file and then connect to that button with selected touchupinside connection.
In the .h file:
- (IBAction)gotoSecondPage:(id) sender;
In the .m file:
- (IBAction)gotoSecondPage:(id) sender
{
NSLog(#"In gotoSecondPage");
LeoActionViewController *aSecondPageController =
[[LeoActionViewController alloc]
initWithNibName:#"LeoActionViewController"
bundle:nil];
[self.navigationController pushViewController:aSecondPageController animated:YES];
[aSecondPageController release];
}
I'm not sure in what capacity you want to switch views.
What immediately comes to mind is that you want a Navigation Controller. This is an object that lets you put view controllers on a stack and push and pop them to show and hide them. It creates a navigation pathway through your app and is easy to use. It also facilitates the 'standard' navigation bar which is found in many iphone apps.
If you just want to change one view for another view you can do many things including hiding and showing different views using setHidden:(bool)hidden. Otherwise you can use addSubview:(UIView *)view and removeFromSuperview to add and remove views completely from the superview.
Related
First, I would like to warn that I am a complete newbie into iPhone coding...
I need to show up a viewcontroller from a library, I know that it is modal. I have a tab bar app (created with the default XCode template). I need to show that viewcontroller, there are no problem if it hides the tabbar itself... But I am quite clueless, I don't know even what to search, or what to read...
You can call presentModalViewController:animated: to display another UIViewController modally.
EDIT: If you want to display your modal view in response to a button touch (for example), you would display it like this:
- (IBAction)buttonTouched:(id)sender
{
ModalViewController* controller = [[ModalViewController alloc] init];
[self presentModalViewController:controller animated:YES];
[controller release];
}
Then when you want to dismiss the modal controller, call dismissModalViewControllerAnimated:. This can be called either on your main view controller, or the modal one.
I don't know even what to search, or
what to read...
View Controller Programming Guide is a good place to start to help you understand view controllers (including modal ones). If that's confusing, get a bigger picture with iOS Application Programming Guide or start at the very beginning.
You can call modal view as
YourViewController *yvc = [[YourViewController alloc] initWithNibName:#"YourViewController" bundle:YES]
[self presentModalViewController:yvc animated:YES];
You can call it in the IBAction method in case you want to call it on any control event like Button Click
-(IBAction)buttonClicked:(id)sender
{
YourViewController *yvc = [[YourViewController alloc] initWithNibName:#"YourViewController" bundle:YES]
[self presentModalViewController:yvc animated:YES];
}
You can call it using self.
Hope this helps you.
If you have more doubts on this then you can ask me.
I'm new to iPhone development, and multiple views (xib or nib) are really confusing me. This is what i'm trying to achieve...
using TabBarControllerAppDelegate
Have 5 different TabBar Items and have created 5 different Views thru the TabBarController
The First View has a UIButton that is a Next button that needs to go to another view called View2.XIB.
I setup a new UIViewController which references the View2 and an IBAction for the switchPage, etc but not able to get it to do anything when clicking on the button.
All of My TabBar buttons work but not able to Navigate to anything outside of the Tabbar
Any help in this regard will be highly appreciated. Anyone have any examples
IBAction switchPageButtonPressed:(id)sender
{
[self.tabbarcontroller.tabBar setSelectedItem:[self.tabbarcontroller.tabBar.items objectAtIndex:1]];
here 1 means ur 2nd tabbar
}
It is difficult to find the problem without the code, but I will assume your action code for the switchPage button is incorrect. You should use code similar to the following:
- IBAction switchPageButtonPressed:(id)sender
{
ViewController2 *view2VC = [[ViewController2 alloc] initWithNibName:#"View2" bundle:nil];
[self presentModalViewController:nview2VC animated:YES];
[view2VC release];
}
If you are confident your method works, then you will want to verify that the action is hooked up correctly. The easiest way to do this is to place a breakpoint on the method and run the app in Debug. When you click the button, the debugger should break on your method, if it doesn't, you will need to check your connections in Interface Builder.
Here is my experiment:
1.
What I would like to do is to manage my app navigation manually so I set
[self.navigationController setNavigationBarHidden:YES];
2.
I created a MyFormControllerView which is a contact form actually and will be used for adding and editing contacts. Now when adding a contact my custom navigation bar will have different buttons then that when editing thus I created also AddMyFormControllerView and EditMyFormControllerView.
3.
Here goes the fun part. I would like from AddMyFormControllerView and EditMyFormControllerView to display a custom header (in this case some buttons) and beneath I would like to show MyFormControllerView.
QUESTION:
I assume that I should connect/include MyFormControllerView with/into other controllers through a UIViewController but I don't have luck. How can I do it? Note please that I would like to use the Interface builder as much as possible.
And yes... I know there is no need to have two additional controllers to achieve that. My question is only how can I connect views together.
I'm not sure I fully understand your question, but here's what I think you should do.
Don't have a MyFormControllerView and then embed other view controllers -- that gets too messy and adds unnecessary complexity. Just have AddMyFormControllerView and EditMyFormControllerView like you would if you were using a UINavigationController, but in the -viewWillAppear: method of the view controllers, add [self.navigationController setNavigationBarHidden:YES]; (as you already are). All that does is hide the navigation bar; everything else about the behavior of the navigation controller is the same (except of course for the fact that you have to allow the user to switch between views, which you are with the custom header).
As for the custom header, just add it to as a subview of the AddMyFormControllerView and EditMyFormControllerView as you would any other view.
From MyFormControllerView, you can push to EditMyFormControllerView, and you can present modally AddMyFormControllerView.
To Push:
MyFormControllerView *mfcv = [[MyFormControllerView alloc] initWithNib:#"MyFormControllerView" bundle:nil];
[self.navigationController pushViewController:mfcv animated:YES];
To Present Modally:
EditMyFormControllerView *emfcv = [[EditMyFormControllerView alloc] initWithNib:#"EditMyFormControllerView" bundle:nil];
[self.navigationController presentModalViewController:emfcv animated:YES];
I created a new Navigation Based Application project.Then in MainWindow.xib I added a button to the navigationbar. I would like to push a new View onto the screen where I can enter information, which will be added as an object to the array of the UITableView.
But I don't know where to write the IBAction to link the button to (Appdelegate or the RootViewController)? Because as you see in the screenshot, it resides in MainWindow.xib because the RootViewController is merely a Table and doesn't contain the navigation. But in the document view of MainWindow.xib it is located under the RootViewController.
Do I have to create a new View Controller inside the XIB as well and create an IBOutlet for it?
I tried putting the code inside my AppDelegate and reference the button to the delegate but it doesn't work.
Please help. Thanks in advance.
See the screenshot here: http://i56.tinypic.com/5djbcm.png
When you ask yourself a question "where does this action belong" it's most probably a controller because controllers handle event flows in your app. Next question - "What controller is in charge when this action happens? What controller is most interested in this action?". Answer in your case is root table controller (RootViewController instance). Create an IBAction method in it which will push form controller (one you use to enter information) to navigation controller.
// somewhere in RootViewController.m
- (IBAction)addNewEntry {
NewEntryFormController *c = [[[NewEntryFormController alloc] init] autorelease];
// ...
[self.navigationController pushViewController:c animated:YES];
}
Going through many tutorials and with the help of everyone here, I am trying to wrap my head around using multi view controllers with their own xib files.
I have one example where there is a : multiViewController and two others: aboutViewController, rulesViewController.
In both aboutViewController.m and rulesViewController.m files, I have placed the following code:
- (void)viewDidLoad {
NSLog(#"rules View did load"); // (Or About View did load, depending on the .m file)
[super viewDidLoad];
}
The mainViewController.m file contains:
-(IBAction) loadRules:(id) sender {
[self clearView];
[self.view insertSubview:rulesViewController.view atIndex:0];
}
-(IBAction) loadAbout:(id) sender {
[self clearView];
[self.view insertSubview:aboutViewController.view atIndex:0];
}
My question is, why is it when I run the application does the ViewDidLoad for both About and Rules fire? Meaning, I get the NSLog messages. Does this mean that regardless of the separate xib files, all views are loaded on start up?
My point of all this is: I want the multiViewController to be my main menu which will have separate buttons for displaying the other xib files when clicked. I had been placing my "initalize" code in the viewDidLoad but this seems wrong now as I don't want to hit until the users presses the button to display that view.
An example was to have a view that is: playGameViewController. In the viewDidLoad I was checking to see if a prior game was in progress and if so, prompt the user if they would like to resume. In the above case, when the app starts, it prompts right away (because the viewDidLoad is firing) even though I only wanted to display the main menu first.
Any explanation is greatly appreciated. Thanks in advance.
Geo...
My question is, why is it when I run
the application does the ViewDidLoad
for both About and Rules fire?
Meaning, I get the NSLog messages.
Does this mean that regardless of the
separate xib files, all views are
loaded on start up?
When you call
[self.view insertSubview:rulesViewController.view atIndex:0];
it's going to first call viewDidLoad for the initial view and then viewDidLoad once again for RulesViewController.
When your MainViewController, or any view for that matter loads, viewDidLoad is called automatically. ViewDidLoad is there in order for you to override or modify any objects in the nib, or you can create objects yourself. Views are only loaded on an as needed basis. If you were to load all your views initially when the app boots up, the user would just see a black screen until all the views are processed.
You say you are going through some tutorials, I don't know your area of expertise yet, but have you looked into navigation based apps using UINavigationController?
Just an example as your request if you want to have a button load a view you can do something like.
- (IBAction)pushSecondView:(id)sender {
SecondViewController *secondView = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
if (secondView != nil) {
secondView.title = #"Second View";
[self.navigationController pushViewController: secondView animated: YES];
}
}