I receive this error
Property implementation must have its declaration in interface "AppDelegate"
When I declare
#implementation AppDelegate
#synthesize window, viewController;
#synthesize token;
I'm using Xcode 4.4.
This means that you need to go to your AppDelegate.h file, and add a declaration for token. Let's say it's NSString*; then you should add the following line to your .h file:
#property (nonatomic, readwrite) NSString *token;
Substitute NSString* for the correct type of your token property. More information about properties can be found here.
It looks like you didn't set widow, viewController or token as properties in your .h file.
Did you type #property (nonatomic, strong) NSString *token;
Related
#property (unsafe_unretained,nonatomic) id<SceneDelegate> delegate;
it works fine on xcode 5, but it gives me this error on xcode 6.1
Error: Property type 'id<SceneDelegate>' is incompatible with type 'id<SKSceneDelegate>' inherited from 'SKScene'
what's that mean?
Addition:
beginning of scene.h
#protocol SceneDelegate <NSObject>
- (void) eventStart;
#end
#interface Scene : SKScene<SKPhysicsContactDelegate>
#property (unsafe_unretained,nonatomic) id<SceneDelegate> delegate;
viewController.h
#import "Scene.h"
#import <AVFoundation/AVFoundation.h>
#interface ViewController : UIViewController<SceneDelegate, AVAudioPlayerDelegate>
viewController.m
scene.delegate = self;
That's all the lines contain SceneDelegate.
It means SKScene already has a property of the same name: delegate
You are trying to redeclare that property but with a different protocol: SceneDelegate instead of SKSceneDelegate.
So either you wanted to use the delegate property, in that case you needn't declare that property, just assign your SKSceneDelegate object to the delegate property. For example:
self.delegate = mySceneDelegateObject;
Otherwise use a different name instead of delegate if SceneDelegate is an actual protocol you created (and consider renaming the protocol because it's easily confused with SKSceneDelegate).
Somehow I got this error in XCode 4.0.2, not sure what is wrong.
File: HomeViewController.h
#import <UIKit/UIKit.h>
#interface HomeViewController : UIViewController <UITabBarDelegate>
{
UIButton *Button1, *Button2, *Button3;
}
#property (nonatomic, retain) IBOutlet UIButton *Button1;
#property (nonatomic, retain) IBOutlet UIButton *Button2;
#property (nonatomic, retain) IBOutlet UIButton *Button3;
.... other member functions...
....
#end
File: HomeViewController.m
......
#import "RemoteServiceManager.h"
#interface HomeViewController()
{ //This is where the error happens: Expected Identifier or "(" before "{" token
RemoteServiceManager* serviceManager;
}
#end
#implementation HomeViewController
#synthesize Button1, Button2, Button3;
.... other member functions
....
#end
Looks like it does not recognize RemoteServiceManager. Wherever I used the serviceManager, it will say HomeViewController has no member named serviceManager.
Is it possible that is caused by XCode version? I am using XCode 4.0.2 on Mac OS X 10.6.7.
Thanks.
you cant add instance variables to private categories.
put properties in there instead, and synthesize them to obtain a variable as well as an internal getter/setter
#interface HomeViewController
#property (nonatomic, strong) NSString *privateProperty;
#end
#implementation HomeViewController
#synthesize privateProperty = _privateProperty;
#end
or you can add the instance variable to the class itself.
#implementation HomeViewController
NSString *privateVariable;
#end
Bear in mind also. that if you create a category in another file, any variables you declare in the body of that category will be static across all instances. definitely something to keep an eye out for.
To recap. you can create a variable in the interface of the main category. or in the implementation of the main category.
and the private category is for you to add prototypes to your class that will let the rest of the file know they "will be/are" available.
the old xcode cant do this, no. it does know class extensions yet because it ships with an older version of the LLVM compiler
You probably found your answer, but I post the answer here for somebody who encounters the same problem:
as Daij said, the problem is due to the version of compiler, so to fix this you need to change the compiler setting:
Build Setting > Build Options > Compiler for C/C++/ObjectiveC
Change value from "LLVM GCC 4.2" to "Apple LLVM compiler 4.2"
Hope it helps.
I'm trying to create a custom class for this online tut:
http://mobile.tutsplus.com/tutorials/iphone/design-build-a-small-business-app-aqgridview/
and about a quarter of the way down the page it says:
"Select the MainStoryboard_iPhone file and change the Class of the SecondViewController nib to GridViewController."
However, for the life of me, GridViewController won't come up in the custom class options!
I've followed the instructions:
"Cocoa Touch->Objective -C Class->NSObject template. Call it GridViewController. "
And put into my .h file:
#import <UIKit/UIKit.h>
#import "AQGridView.h"
#interface GridViewController : UIViewController <AQGridViewDelegate, AQGridViewDataSource>
#property (nonatomic, retain) IBOutlet AQGridView * gridView;
#property (nonatomic, retain) NSArray * services;
#end
Shouldn't it show up as a class?
Have you made sure that you are setting the custom class of the view controller object in the nib?
You could try cleaning and building your project again to make sure everything is indexed properly, or you could try manually entering the class name in the custom class field and then compiling to see if any helpful errors are thrown.
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'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.