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];
Related
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);
I have an application where I need to access model data from my subviews. I've been using bindings to pass data across views; however, the bindings to self seem to be causing retain cycles (dealloc never gets called). When should I remove the bindings if not in the dealloc method? Thanks.
P.S. I know the method of binding to a proxy object controller, but I'd like to avoid using it if possible.
Here's an example of what I've been doing:
// Top-level Project view
#interface ProjectViewController : NSViewController {
FoldersView *foldersView;
}
#property (strong) NSObjectController *projectObjectController; // holds Project instance
end
// Displays folders
#interface FoldersView : NSView {
FolderView *folderView;
}
#property (weak) NSObjectController *projectObjectController; // binded from parent
#property (strong) NSArrayController *foldersArrayController; // binded to project.folders
#end
// Displays selected folder
#interface FolderView : NSView
#property (weak) NSArrayController *foldersArrayController; // binded from parent
#property (strong) NSObjectController *folderObjectController; // binded to folders.selection
#end
The bindings are the preferred way of removing C part (boilerplate code) from the MVC trinity. So your approach to handling this problem is correct.
I'm trying to make a simple Cocoa application using the newest version of XCode. In interface builder I added NSTextField and NSButton. When I press the button, I want it to clear whatever is in the text field.
I made a new class called AppController.h. This is the contents:
#import <Foundation/Foundation.h>
#interface AppController : NSObject {
IBOutlet id textView;
}
- (IBAction) clearText: sender;
#end
AppController.m looks like this:
#import "AppController.h"
#implementation AppController
- (IBAction) clearText: sender
{
[textView setString: #" "];
}
#end
I connected the button to clearText and the textbox to textView.
The program compiles and runs. But when I press the button, nothing happens. Why is that?
here's the run down.
1.Create an IBAction in your appController class header.
- (IBAction)someMethod:(id)sender;
2.Then create an IBOutlet for you text field
IBOutlet NSTextField *textFieldname;
You then connect the IBAction to the button in interface builder, and your IBOutlet to your textfield.
Inside the implementation file (.m) IBAction method do
- (IBAction)someMethod:(id)sender{
textFieldname.stringValue = #"";
}
This is very basic. I suggest you google for some tutorials. There's plenty out there. Here's something that may help. Chapter 8 describes how to do exactly what you're asking.
link text
I'm trying to make a simple Cocoa application using XCode 3.2.3. In interface builder I added NSTextField and NSButton. When I press the button, I want it to clear whatever is in the text field.
I made a new class called AppController.h. This is the contents:
#import <Foundation/Foundation.h>
#interface AppController : NSObject {
IBOutlet id textView;
}
- (IBAction) clearText: sender;
#end
AppController.m looks like this:
#import "AppController.h"
#implementation AppController
- (IBAction) clearText: sender
{
[textView setString: #" "];
}
#end
I connected the button to clearText and the textbox to textView.
The program compiles without error and runs. But when I press the button, nothing happens. Why is that?
Using id for an IBOutlet is a bad practice. Use
IBOutlet NSTextView* textView;
instead.
Please check using the debugger, or putting NSLog(#"foo!"); before [textView setString:#""] to see if the action method is really called.
Another pitfall is that there are NSTextView and NSTextField. These two are different!
The former supports both setString: and setStringValue:, while the latter only supports setStringValue:.
Which object did you use in the interface builder?
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.