This is how I use a XIB view controllers view as a subview in the MainViewController:
UIViewController *nameController = [[NameSubViewController alloc] initWithNibName:#"NameSubViewController" bundle:nil];
nameSubView = [nameController view];
[self.view addSubview:nameSubView];
The nameController view contains a UITextField property. Can I somehow access this property from MainViewController?
EDIT:
If I create a property for the textField in the View Controller too, I'm still not able to get it in MainViewController. Think it's because of the UIView subclassed causing problems?
NameSubViewController.h:
#import <UIKit/UIKit.h>
#interface NameSubViewController : UIViewController
#property (nonatomic, strong) IBOutlet UITextField *textField;
#end
NameSubView.h:
#import <UIKit/UIKit.h>
#interface NameSubView : UIView
#property (nonatomic, strong) IBOutlet UITextField *textField;
- (IBAction)textFieldReturn:(id)sender;
#end
Connections in IB for NameSubViewController:
Connections, NameSubViewController
Connections in IB for NameSubView:
Connections, NameSubView
Did you create an outlet for the textfield in your nameController? Do that, and then you can retrieve the value using
nameController.textField.text
In the nib file, click on the file's owner icon (on the left of the nib), and set it's class to your UIView's subclass using the inspector on the right.
Why are you adding view from Controller A in Controller B. Isn't it better that you create a view by only using its xib file and add that view to your controllers view.
For accessing field, you can assign a tag to your textfield, and where ever in your code you need it, call
self.view viewWithTag:<#(NSInteger)#> method.
Related
I'm trying to put two NSPopover on two Help Buttons on a .xib file.
To do so, I declared in my .h
#interface ExportPreferences : NSPreferencePane <NSPopoverDelegate>
{
NSWindow *window;
NSPopover *popover;
NSUserDefaults *prefs;
NSMutableArray *myArran;
IBOutlet NSButton *images;
IBOutlet NSPopUpButton *modalities;
IBOutlet NSPathControl *path;
IBOutlet NSPopUpButton *tree;
IBOutlet NSPopUpButton *extension;
}
#property (assign) IBOutlet NSWindow *window;
#property (assign) IBOutlet NSPopover *popover;
#end
And two different methods in my .m :
- (IBAction) showInfoTreePopover {
[[self popover] showRelativeToRect:[sender bounds] ofView:sender preferredEdge:NSMaxXEdge];
}
- (IBAction) showInfoTypePopover {
[[self popover] showRelativeToRect:[sender bounds] ofView:sender preferredEdge:NSMaxXEdge];
}
Then, in my .xib I declared
A Popover with its Popover View Controller
A Custom View
A Label (on the CV)
And I linked :
The Help Button to its corresponding method (one for the Tree, one for the Type)
The File's Owner to the Popover
The Popover View Controller to the Custom View
Since I do have two NSPopover to implement, I did all of this twice, two Popover, two Popover View Controller, two Custom View, two labels.
When I compile, everything goes right, but when I test it, it appears that only my second Popover shows up on the two buttons. It seems that implementing the second Popover, erased the first one.
how may I patch that ?
Alright, I answered my own question but I think I might give the answer if anyone faces the same problem.
When using two NSPopovers, I had to declare two different Outlets,
NSPopover *treePopover;
NSPopover *typePopover;
Also, two properties
#property (assign) IBOutlet NSPopover *treePopover;
#property (assign) IBOutlet NSPopover *typePopover;
And now, the linking works perfectly.
I'm completely new to Xcode and Objective C but managed to get a working prototype for an app by the help of this site. But at the moment I do not find any solutions for the following problem after nearly a day of research and trial&error.
I'm working with storyboards.
I have two classes: ClassA and ClassB.
ClassA has a containerView which holds another ViewController thats class is Class B.
This ViewController within the containerView holds an UIScrollView (defined in ClassB) which I want to be able to scroll to top from ClassA.
It works in the same class (ClassB) with this code...
[Scroller setContentOffset:CGPointZero animated:NO];
...but not from another class (ClassA)
How can I access the IBOutlet UIScrollView in ClassB from ClassA and tell it to scroll up?
Thanks so much for your help!
You have to define the iVar as #property:
#interface ClassB : UIViewController {
// don't define it here as iVar like: IBOutlet UIScrollView *Scroller;
}
#property (nonatomic, strong) IBOutlet UIScrollView *Scroller; // but define it here as property
You could then access the scrollView like this in ClassA:
[[instanceB Scroller] setContentOffset:CGPointZero animated:NO];
And like this in ClassB
[_Scroller setContentOffset:CGPointZero animated:NO];
I would like to create a UITabbar like below but i don't know what is the logic to do that.
Here is the large answer:
First of all, you will need to create a UIView subclass to get a view that looks like the bar that you want. It can be composed by a background UIImageView and three buttons.
Then, the best thing would be to create a subclass of the UITabBarController and in its viewDidLoad or at any point where the flow will go through just once, you instantiate one view of type specified at first point. You should place the frame of this view in order to hide the original tabbar of the controller.
This would be the custom bar header file:
#interface CustomBar : UIView
{
}
#property (nonatomic, retain) UIImageView *backgroundView;
#property (nonatomic, retain) NSArray *buttons;
#end
You can easily complete the implementation. You can try to look for how to instantiate it with a nib file to make it easier to design it. In order to test, you can first just set the background color to green or something visible.
Then, this would be the subclass of the UITabBarController class:
#interface CustomTabBarController : UITabBarController
#property (nonatomic, retain) CustomBar *customBar;
#end
#implementation CustomTabBarController
- (void)viewDidLoad
{
[super viewDidLoad];
self.customBar = [[[CustomBar alloc] initWithFrame:[self.tabBar frame]] autorelease];
[self.view addSubview:self.customBar];
}
#end
Please, remember to implement the dealloc if you are not using ARC.
The thing I am not sorting out here is how to create the communication between the buttons from the custombar and the tabbarcontroller. This should be solved by delegates. If you need help with that, I will complete that too.
Good luck!
I have a ViewController that has a couple of IBOutlet properties defined for UITextView. In the storyboard I have assigned my viewcontroller to the custom view controller. When I cntr + click on the viewcontroller I can see my two IBOutlets. When I try to drag them to the UITextViews on the storyboard they will not highlight and cannot be assigned.
I'm new to xcode 4.
Here is the property definitions from the viewcontroller:
#interface CreateUserViewController : UIViewController<UITextInputDelegate>
#property(nonatomic,retain) KeychainItemWrapper *keyChainWrapper;
#property(nonatomic,retain) IBOutlet UITextView *userNameTxt;
#property(nonatomic,retain) IBOutlet UITextView *passwordTxt;
These properties are synthesized in the implementation. I can assign each of the textfields' delegate to the viewcontroller without a problem. Am I missing any step?
Thanks
Make sure that the views you're trying to connect really are UITextViews and not UITextFields. It's not difficult to get them mixed up.
I have the following structure in my iPad App:
Application
UINavigationController (Providing the top bar with UIBarButtons etc.)
Initial Login screen
Second login screen
I am not sure how I should now set this up in Interfacebuilder correctly. My guess would be that I create two ViewControllers:
LoginVC1: (This one should also include the NavigationController since it is the first of the two screens)
LoginVC2: Based on some delegate callback from LoginVC1 my application would push to this ViewController.
This is my LoginVC1 in IB:
LoginVC1 http://k.minus.com/jpamEAFkBjpKT.png
And when I present it modally it looks like this which is not what I want:
Result http://k.minus.com/jHAYRnY788jFt.png
The result:
Nor the title of the ViewController nor the Cancel button is shown
The view seems to be empty despite my view in IB
I have set the Presentation mode of the UINavigationController to FormSheet which is ignored too since it is displayed in fullscreen.
What am I doing wrong?
Kjuly I simply do presentModalViewController to show the dialog, but
since my UINavigationControler contains a UIViewController (See
nib-screen), I would assume that this ViewController is displayed when
the modal is shown.
Not always Besi. Adding it to the UINavigationController Hierarchy doesn't add is as the rootViewController. That must be done in code like this:
UIViewController *rootViewController = [[[ExamplesViewController alloc] init] autorelease];
UINavigationController * navController = [[UINavigationController alloc] initWithRootViewController:rootViewController];
Also, check that you are presenting the NavigationController, and not the ViewController modally.
To solve the NavigationBar title issue, try setting the self.title property in the
-(void)viewDidload method and see if that works. If not, try self.//instance of UINavigationController//.navigationBar.title = #"string".
As for the other buttons not showing up, my guess is that if setting the root controller in code doesn't help, then you only made reference to them in the .h, instead of instantiating them. So either call something like this in the .h:
//.h
#implementation ExampleViewController: UIViewController <UITextFieldDelegate> {
IBOutlet UIBarButtonItem * CancelButton;
IBOutlet UITextField * usernameField;
IBOutlet UITextField * passwordField;
IBOutlet UIButton * loginButton;
}
#property (nonatomic, retain) IBOutlet UIBarButtonItem * CancelButton;
#property (nonatomic, retain) IBOutlet UITextField * usernameField;
#property (nonatomic, retain) IBOutlet UITextField * passwordField;
#property (nonatomic, retain) IBOutlet UIButton * loginButton;
Then connect the outlets in the XIB, or instantiate the buttons in the .m with:
//.m
-(void)viewDidLoad {
//do stuff
CancelButton = [[[UIBarButtonItem alloc]initWithTitle:#"Cancel" style:UIBarButtonItemStyleDone target:self action:#selector(dismissSelf)]autorelease];
//do more stuff
}