I'm having problem passing data and executing functions in the viewcontroller from the view. I want to access label outlets in the viewcontroller from the view (yeah I know it might be bad structure of my app).
Got delegations working on UIPopovers but how can I set the delegate of the view to viewcontroller?
For example, you have a subclass of UIView. Let's name it SubClassUIView;
In another view, you want to use the data, from SubClassUIView.
So, your SubClassUIView should be done like this:
SubClassUIView.h
#interface SubClassUIView:UIView
#property (nonatomic, retain) UILabel* someLabelYouWantToUse;
#end.
SubClassUIView.m
#implementation SubClassUIView
#synthesize someLabelYouWantToUse;
#end.
And to access someLabelYouWantToUse
SubClassUIView* scView = [SubClassUIView alloc]init];
NSLog(#"%#", scView.someLabelYouWantToUse.text);
Related
i am trying to archiv something really simple.
I add a property for a NSScrollView in my ViewController header file called PanelController:
#property (strong) IBOutlet NSScrollView *listurls_fld;
I add the ViewController.h file to my NSObject Interface called "qhandler.h"
#import "handler.h"
#import "PanelController.h"
i have a +(void) function inside the qhandler.m ->
+ (void)do_handle:(NSDictionary *)response
{
PanelController *MyView=[[PanelController alloc] init];
NSLog(#"add moo");
[MyView.listurls_fld setStringValue:#"moo"];
}
which doesn't work...
It does neither work with setAlphaValue or whatever, i guess it's because i am allocating a new instance of PanelController, but as a matter of fact, I tried to change the main instance.
I know it's basic but i have enormous problems using IBOutlets from a viewcontroller, inside an external obj-c file.
Thanks,
john
ViewController.h
id mainDelegate;
ViewController.m
in viewDidLoad oder what function ever triggers after load:
mainDelegate=self;
so i can use [mainDelegate ...:..]; in every file..
I just started Mac programming coming over from iOS and was playing around with bindings.
I'm trying to make a simple directory popup that shows a history of recently selected directories and last element would read other... which will open the opendialog box.
I can't seem to figure out how to Bind an NSPopupButton to my Model though.
Its setup like this:
MainUIViewController, NSController, NSObject Controller all wired up in the nib
I do connect an outlet in MainUIViewController to the Directory Array Controller in the NIB
I have a class for eachDirectory, and a class for DirectoryArrayController(NSObject) I bind the NSPopupButton on view this way:
and I have the Directory Array Controller bound to the Directory Popup Array Controller thus
Here is the .h file that is connected to the Directory Popup Array Controller
#interface DirectoryPopupArrayController : NSObject
#property (weak) IBOutlet NSPopUpButton *directoryPopupButton;
#property (nonatomic) IBOutlet NSMutableArray *allDirectoryHistory;
#property (nonatomic) eachDirectory *currentlySelectedDirectory;
#end
I fill some sample directory info with the following code in the corresponding .m file
- (void)awakeFromNib {
[super awakeFromNib];
//testing sample directories
self.allDirectoryHistory = [[NSMutableArray alloc] initWithCapacity:10];
NSString *name;
eachDirectory *newDirectoryName;
for (int i = 0; i < 5; i++) {
name = [NSString stringWithFormat:#"directory %d", i];
newDirectoryName = [[eachDirectory alloc] initWithDirectoryName:name];
[self.allDirectoryHistory addObject:newDirectoryName];
}
}
and here is the code for the eachDirectory.h
#interface eachDirectory : NSObject
#property (nonatomic) NSString *directoryPath;
#property (nonatomic) NSString *directoryVisibleName;
-(id) initWithDirectoryName:(NSString *)newName;
#end
Now When I go to my code if I place the code for creation of the Array and bind the Array controller directly to the UIViewController.m file things seem to work fine.
What I want to do is handle all the array stuff in a separate class file and only get back the final directory choice to the main controller. When I bind the NSArrayController to the Object controller in the NIB as described above I get nothing showing in the popup and I don't understand why!
Any Help is greatly appreciated, Sorry for the long-winded post - just wanted to make myself clear.
I'm creating a MenuBar-Application with a couple of popup-windows, a NSMenu and some regular windows for settings and stuff like that.
I created a NSController to hold all my StatusBar stuff together and notify the popup to open and close.
The popup has it's own PopupWindowController and xib file wich works like a charm. But i can't get it to work with the NSMenu (in my case it's subclassed as RightClickMenu)
In IB i created an other .xib called StatusBarController.xib (with StatusBarController as the file's owner) with the menu and linked it to the outlet.
...
#class RightClickMenu;
#interface StatusBarController : NSController <NSMenuDelegate> {
IBOutlet RightClickMenu *rightClickMenu;
}
#property (nonatomic, retain) RightClickMenu *rightClickMenu;
...
My AppDelegate has a IBOutlet StatusBarController property and a the main .xib which is linked to the NScontroller object.
#class StatusBarController;
#interface MyAppDelegate : NSObject <NSApplicationDelegate> {
IBOutlet StatusBarController *statusBarController;
...
Hope you can help...
cheers
your variable! is an outlet but your property is not
IB uses KVC to set outlets and that will find your property which will use _variable
BTW just in case:
you gotta handle the loading yourself EXCEPT if you subclass NSViewController
in init of the controller you do a [[NSBundle mainBundle] loadNibName:#"bla" owner:self];
I have a problem with a protocol.
My "initial View Controller" is a Navigation Controller. On the root page i show an other Navigation Controller in which is View Controller embedded. onclick a segue should be fired...this works perfectly but the delegate method from the "ViewController" is never called.
The image I added is a example how I build the connection between the 2 NavigationControllers with the InterfaceBuilder in iOS 5.
MyViewController.h
#protocol MyProtocol <NSObject>
#required
- (void) myFunction:(NSString *)string;
#end
#interface MyViewController : UIViewController <MyProtocol>
#property (nonatomic, assign) id<MyProtocol> delegate;
#end
MyViewController.m
#import "MyViewController.h"
#implementation PropertyController
#synthesize delegate = _delegate;
- (void) myFunction:(NSString *)string {
[_delegate myFunction:string];
}
- (IBAction) callDelegate:(id)sender {
![enter image description here][1][self myFunction:#"test"];
}
And this is the code for the ViewController which is showing the NavigationController from above
ViewController.h
#import "MyViewController.h"
#interface ViewController : UIViewController <MyProtocol>
ViewController.m
#import "ViewController.h"
#implementation ViewController
- (void) myFunction:(NSString *)string {
NSLog(#"myFunction was called");
}
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
[((MyViewController *) segue.destinationViewController) setDelegate:self];
}
- (IBAction) showModalNavigationController {
[self performSegueWithIdentifier:#"NameFromSegueInInterfaceBuilder" sender:self];
}
I cant find a solution for my problem.
I hope somebody can help me
thank you :)
I see a couple of problems here:
In your storyboard screenshot, you have a second navigation controller. You should not not need to embed your PropertyController in a navigation controller. Instead, have the root view controller segue directly to the PropertyController. If for some reason you do need that navigation controller, then you would need to change your prepareForSegue implementation above, because segue.destinationViewController in this case points to the UINavigationController. So you would need to get that nav controller object, and then send setDelegate to the rootViewController of that nav controller object. But again, only if you decide to keep that navigation controller.
How does MyViewController relate to your ViewController and PropertyController classes? The PropertyController class (or a superclass) needs to have the #property and synthesize statements for the delegate property.
I've been having the same issue, to make it work, I found a work around which xcode does not really like, but it still is working though --> setting your delegate as you do it, makes your navigation controller have your view as delegate, if you NSLog self.delegate in your destination controller it will be null. To prevent this do -->
self.delegate = self.navigationController.delegate;
in your destination controller (viewdidload), it will get the delegation you created on the navigation controller, and allow you yo use it in your destination controller
It is dirty but it's the only way I found. Hope it helps.
I've been through a bunch of Core Data examples and the Apple documentation. I'm at a wall after working on this all day.
All I want to happen is I type some text into a text field, save the file, open it again and see the text there.
I made a very very simple Core Data document-based app to experiment. Here are the particulars:
1) The data model has one Entity ("Note") with one attribute ("title") which is an NSString.
2) I created a view controller "ManagingViewController" that loads in a view called "NoteView" into a box in MyDocument.xib without a problem. NoteView.nib has just one NSTextField in it.
ManagingViewController.h
#import <Cocoa/Cocoa.h>
#import "Note.h"
#interface ManagingViewController : NSViewController {
NSManagedObjectContext *managedObjectContext;
IBOutlet NSTextField *title;
}
#property (retain) NSManagedObjectContext *managedObjectContext;
#property (retain, readwrite) NSTextField *title;
#end
and ManagingViewController.m
#import "ManagingViewController.h"
#import "Note.h"
#implementation ManagingViewController
#synthesize managedObjectContext;
#synthesize title;
- (id)init
{
if (![super initWithNibName:#"NoteView" bundle:nil]) {
return nil;
}
return self;
}
#end
I have a NSManagedObject called "Note.h"
#import <CoreData/CoreData.h>
#import "ManagingViewController.h"
#interface Note : NSManagedObject
{
}
#property (nonatomic, retain) NSString * title;
#end
and the .m file:
#import "Note.h"
#import "ManagingViewController.h"
#implementation Note
#dynamic title;
#end
In NoteView.nib my:
1) File's Owner is ManagingViewController and the IBOutlets to the Text Field and the view are connected.
2) I dragged over an NSObjectController object into the Interface Builder document window called "Note Object Controller". I set mode to "Entity" and the Entity Name to "Note". "Prepares content" and "Editable" are checked on. (All the examples I've done and been able to find use an NSArrayController here. I don't need an array controller right? I do want to be able to open multiple windows for the same app but I still don't think I need an arraycontroller? All the examples have a NSTableView and a add button. There's no need for an add button here since I don't have an NSTableView).
3) The NSTextView bindings for value I have it bound to "Note Object Controller" with a controller key of representedObject and a Model Key Path of title.
When I run my app I get
[<NSObjectController 0x20004c200> addObserver:<NSTextValueBinder 0x20009eee0>
forKeyPath:#"representedObject.title" options:0x0 context:0x20009f380] was
sent to an object that is not KVC-compliant for the "representedObject" property.
What am I doing wrong? I want to type in the text field, save the file, open it again and see the text there.
[<NSObjectController 0x20004c200> addObserver:<NSTextValueBinder 0x20009eee0> forKeyPath:#"representedObject.title" options:0x0 context:0x20009f380] was sent to an object that is not KVC-compliant for the "representedObject" property.
What am I doing wrong?
The error message tells you what you're doing wrong: You're trying to bind to the representedObject property of your object controller, but it doesn't have one. Binding to properties that don't exist cannot work.
The Note is the content object of the NSObjectController, so that's the controller key you need to bind to: content.