my code:
#interface WBMessageTableCellView : NSTableCellView
#property (weak) IBOutlet NSTextField *authName;
#property (weak) IBOutlet NSTextField *createdTime;
#property (weak) IBOutlet NSImageView *userProfileImageView;
#property (weak) IBOutlet NSTextView *statusTextView;
#end
but I got this error,
what's wrong with this? I have to change my code to this, and it works,
#interface WBMessageTableCellView : NSTableCellView
{
IBOutlet NSTextView *statusTextView;
}
#property (weak) IBOutlet NSTextField *authName;
#property (weak) IBOutlet NSTextField *createdTime;
#property (weak) IBOutlet NSImageView *userProfileImageView;
#property NSTextView *statusTextView;
I have arc turned on on this file, and the project is newly created. not converted from non-arc project.
I've promoted my comment to an answer:
Please take a look at this question:
Which iOS classes that don't support zeroing weak references?
You can't create weak references to classes which don't support weak
references to their instances.
Related
my file AppDelegate.h
#import <Cocoa/Cocoa.h>
#interface AppDelegate : NSViewController <NSApplicationDelegate,NSTableViewDataSource,NSURLConnectionDataDelegate>{
NSMutableArray *users;
NSMutableArray *messages;
NSMutableData *responseData;
NSString *getUsersRequest;
NSString *getMessagesRequest;
int requestStatus;
NSInteger userId;
}
#property (weak) IBOutlet NSTableColumn *tableColumn;
#property (weak) IBOutlet NSTableView *tableUsers;
#property (weak) IBOutlet NSButton *send;
...
I'm trying to create action in xcode:
enter image description here
but I do not see fields "event" and "arguments", Why???
To actually create an action, you should use the .m (implementation) file, not your .h (header) file.
Also, unlike iOS, when developing for OS X and AppKit the options Event and Arguments are not available, this is normal.
I am currently following the tutorials in a book that was written before the use of arc in Xcode. I have the exact same problem like what is stated here:
'Existing ivar 'delegate' for unsafe_unretained property 'delegate' must be __unsafe_unretained
The question has been answered, but is has not been stated exactly why this is the case.
The Code in the book states that I use this code to declare member variables:
the.h File
___________
#import <Cocoa/Cocoa.h>
#interface TestProgramDelegate : NSObject <NSApplicationDelegate> {
NSWindow *window;
NSTextField *message;
}
#property (assign) IBOutlet NSWindow *window;
#property (assign) IBOutlet NSTextField *message;
#property (assign) IBOutlet NSTextField *inputText;
#end
the.m file
__________
#import "the.h" //File
#implementation theHFileAppDelegate
#synthesize window
#synthesize message
#synthesize inputText
When I synthesize the variables in my .m file, I get the following error message:
Existing ivar 'window' for property 'window' with assign attribute must be __unsafe_unretaied.
But when I remove the declaration of the member variables like its stated in the book, everything works fine and I don't get an error.
the.h File
___________
#import <Cocoa/Cocoa.h>
#interface TestProgramDelegate : NSObject <NSApplicationDelegate> {
NSWindow *window;
NSTextField *message;
}
#property (assign) IBOutlet NSWindow *window;
#property (assign) IBOutlet NSTextField *message;
#property (assign) IBOutlet NSTextField *inputText;
#end
the.m file
__________
#import "the.h" //File
#implementation theHFileAppDelegate
#synthesize window
#synthesize message
#synthesize inputText
My program works, but I want to understand why this causes trouble. Thanks a lot.
I am new to Objective-c and Xcode, yet I believe I know enough about it to realize that something is going wrong here. I have an application using a storyboard, and one of the views in the application is not running its viewDidLoad method. I am not sure if this is relevant, but I had recently accidentally deleted my original storyboard, and had to make another one. The original had worked great with no problems, yet when I use the new one, it does not work. The view in question is also the first view of a Tab Bar Controller, which might be part of the problem.
Here is the code from the class responsible for the view (.h):
#import <UIKit/UIKit.h>
#interface TabSynth : UIViewController
#property (nonatomic, retain) IBOutlet UIImageView *tomeWater;
#property (nonatomic, retain) IBOutlet UIImageView *tomeFire;
#property (nonatomic, retain) IBOutlet UIImageView *tomeAir;
#property (nonatomic, retain) IBOutlet UIImageView *tomeEarth;
#property (nonatomic, retain) IBOutlet UIImageView *tomeDark;
#property (nonatomic, retain) IBOutlet UIImageView *tomeLight;
#property (nonatomic, retain) IBOutlet UIButton *airSynthButton;
#property (nonatomic, retain) IBOutlet UIButton *darkSynthButton;
#property (nonatomic, retain) IBOutlet UIButton *earthSynthButton;
#property (nonatomic, retain) IBOutlet UIButton *fireSynthButton;
#property (nonatomic, retain) IBOutlet UIButton *lightSynthButton;
#property (nonatomic, retain) IBOutlet UIButton *waterSynthButton;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonLarv;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonAmoeb;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonLarv1;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonAmoeb1;
#property (nonatomic, retain) IBOutlet UIImageView *tomeWater1;
#property (nonatomic, retain) IBOutlet UIImageView *tomeFire1;
#property (nonatomic, retain) IBOutlet UIImageView *tomeAir1;
#property (nonatomic, retain) IBOutlet UIImageView *tomeEarth1;
#property (nonatomic, retain) IBOutlet UIImageView *tomeDark1;
#property (nonatomic, retain) IBOutlet UIImageView *tomeLight1;
And here is the code from the (.m):
#import "TabSynth.h"
#implementation TabSynth
#synthesize tomeWater;
#synthesize tomeFire;
#synthesize tomeAir;
#synthesize tomeEarth;
#synthesize tomeDark;
#synthesize tomeLight;
#synthesize tomeWater1;
#synthesize tomeFire1;
#synthesize tomeAir1;
#synthesize tomeEarth1;
#synthesize tomeDark1;
#synthesize tomeLight1;
#synthesize airSynthButton;
#synthesize darkSynthButton;
#synthesize earthSynthButton;
#synthesize fireSynthButton;
#synthesize lightSynthButton;
#synthesize waterSynthButton;
#synthesize synthButtonLarv;
#synthesize synthButtonAmoeb;
#synthesize synthButtonLarv1;
#synthesize synthButtonAmoeb1;
-(void)viewDidLoad {
extern int gTomeAir;
extern int gTomeDark;
extern int gTomeEarth;
extern int gTomeFire;
extern int gTomeLight;
extern int gTomeWater;
extern int gAmoebaeNum;
extern int gLarvaeNum;
synthButtonAmoeb.hidden=YES;
synthButtonAmoeb1.hidden=NO;
synthButtonLarv.hidden=YES;
synthButtonLarv1.hidden=NO;
if (gTomeAir>0) {
tomeAir.hidden=NO;
tomeAir1.hidden=YES;
airSynthButton.hidden=NO;
}
if (gTomeDark>0) {
tomeDark.hidden=NO;
tomeDark1.hidden=YES;
darkSynthButton.hidden=NO;
}
if (gTomeEarth>0) {
tomeEarth.hidden=NO;
tomeEarth1.hidden=YES;
earthSynthButton.hidden=NO;
}
if (gTomeFire>0) {
tomeFire.hidden=NO;
tomeFire1.hidden=YES;
fireSynthButton.hidden=NO;
}
if (gTomeLight>0) {
tomeLight.hidden=NO;
tomeLight1.hidden=YES;
lightSynthButton.hidden=NO;
}
if (gTomeWater>0) {
tomeWater.hidden=NO;
tomeWater1.hidden=YES;
waterSynthButton.hidden=NO;
}
if (gAmoebaeNum > 0) {
synthButtonAmoeb.hidden=NO;
synthButtonAmoeb1.hidden=YES;
}
else {
synthButtonAmoeb.hidden=YES;
synthButtonAmoeb1.hidden=NO;
}
if (gLarvaeNum >= 1) {
synthButtonLarv.hidden=NO;
synthButtonLarv1.hidden=YES;
}
else {
synthButtonLarv.hidden=YES;
synthButtonLarv1.hidden=NO;
}
}
In the if statements, the external integers being called (gTome) were set equal to a number in the previous view. Any help at all would be great, and I apologize for the simpleness of my coding.
If it's not calling viewDidLoad, then the first thing to check is that in your storyboard you have properly set TabSynth as the custom class of your view controller. Also, I don't see an NSLog in your viewDidLoad method. How do you know it's not being called?
By the way, did you know that you can put non-UI objects in a nib or storyboard? I think this might help you simplify your code. For example, you could have a class ElementViews defined like this:
ElementViews.h
#interface ElementViews : NSObject
#property (assign, nonatomic) IBOutlet UIImageView *tome;
#property (assign, nonatomic) IBOutlet UIButton *synthButton;
#property (assign, nonatomic) IBOutlet UIImageView *tome1;
#end
and then in your TabSynth class, instead of three outlets for every element, you just have one outlet:
TabSynth.h
#class ElementViews;
#interface TabSynth : UIViewController
#property (nonatomic, retain) IBOutlet ElementViews *waterViews;
#property (nonatomic, retain) IBOutlet ElementViews *fireViews;
#property (nonatomic, retain) IBOutlet ElementViews *airViews;
#property (nonatomic, retain) IBOutlet ElementViews *earthViews;
#property (nonatomic, retain) IBOutlet ElementViews *darkViews;
#property (nonatomic, retain) IBOutlet ElementViews *lightViews;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonLarv;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonAmoeb;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonLarv1;
#property (nonatomic, retain) IBOutlet UIButton *synthButtonAmoeb1;
...
In your storyboard, you drag a generic "Object" (looks like an orange cube) into your TabSynth scene. Change its custom class to ElementViews and its identity label to Water Views. Connect the waterViews outlet of the TabSynth to this new ElementViews object, and connect the outlets of the ElementViews object to the three water views (the tome and tome1 image views and the synthButton button). Repeat for the other five elements.
Then you can simplify your viewDidLoad method like this:
- (void)configureElementViews:(ElementViews *)elementViews state:(int)state {
if (state > 0) {
elementViews.tome.hidden = NO;
elementViews.tome1.hidden = YES;
elementViews.synthButton.hidden = NO;
}
}
- (void)viewDidLoad {
extern int gTomeAir;
extern int gTomeDark;
extern int gTomeEarth;
extern int gTomeFire;
extern int gTomeLight;
extern int gTomeWater;
extern int gAmoebaeNum;
extern int gLarvaeNum;
synthButtonAmoeb.hidden=YES;
synthButtonAmoeb1.hidden=NO;
synthButtonLarv.hidden=YES;
synthButtonLarv1.hidden=NO;
[self configureElementViews:self.waterViews state:gTomeWater];
[self configureElementViews:self.fireViews state:gTomeFire];
[self configureElementViews:self.airViews state:gTomeAir];
[self configureElementViews:self.earthViews state:gTomeEarth];
[self configureElementViews:self.darkViews state:gTomeDark];
[self configureElementViews:self.lightViews state:gTomeLight];
}
ok but you must write [super viewDidLoad] at the beginning of the method -viewDidLoad to call the viewDidLoad of the Controller itself (the father or its predecessor in the hierarchy of object) before writing your superb code which create a derived version of -viewDidLoad.
voila, good luck.
I've got a TextField that I'm trying to update the values as it progresses through running my code using KVC. Unfortunately I cannot seem to get anything to update past the initial value.
I've used the bindings on the button that launches the code, the TextField that I want to update and it just doesn't want to update. Please forgive me for the n00bish question but I've been searching online all day, going through tutorials, rewriting the code different ways and can't seem to figure out why this very simple tasks won't work.
Here is my KVC.h file:
#import <Foundation/Foundation.h>
#interface KVC : NSObject{
NSString *_progressString;
}
#property (nonatomic, retain) NSString *progressString;
#end
Here is my App header file:
#import <Cocoa/Cocoa.h>
#import "KVC.h"
//UI Controls
#interface AppDelegate : NSObject <NSApplicationDelegate>
{
NSWindow *window;
NSPersistentStoreCoordinator *__persistentStoreCoordinator;
NSManagedObjectModel *__managedObjectModel;
NSManagedObjectContext *__managedObjectContext;
NSButton *_loadingExtracts;
NSButton *_processStuff;
NSProgressIndicator *_progressBar;
KVC *myProgressString;
}
#property (assign) IBOutlet NSWindow *window;
#property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;
#property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
#property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
#property (assign) IBOutlet NSButton *loadingExtracts;
#property (assign) IBOutlet NSButton *processStuff;
#property (assign) IBOutlet NSProgressIndicator *progressBar;
- (IBAction)saveAction:(id)sender;
- (IBAction)loadingExtracts:(id)sender;
- (IBAction)processStuff:(id)sender;
#end
And finally, here is the function inside the code that I cannot get to update.
- (IBAction)processStuff:(id)sender
{
KVC *frickenHeck = [[KVC alloc] init];
NSLog(#"Button Pressed - Processing Information");
[myProgressString setValue:#"Testing" forKey:#"_progressString"];
[_progressBar setUsesThreadedAnimation:YES];
[_progressBar startAnimation:self];
//Turn off Progress Bar
[_progressBar stopAnimation:self];
[frickenHeck setValue:#"Completed" forKey:#"_progressString"];
//[_progressText setStringValue:#""];
}
(As you can see, I've tried updating 2 different ways and neither work. The allocation seems to set up the initial variable just fine, the Log shows I'm in the method, just can't get my label to update past the allocation).
Any thoughts or ideas would be greatly appreciated.
I am more of a iOS developer, so I am not 100% certain how some of the standards cross-over to the OSX side of things. Nevertheless,
You are saying that you are using KVC, like it is a framework providing a easy to use key-value coding scheme, which doesn't necessarily make sence. This appears to be a custom class you created called KVC.
In your KVC.m file did you #synthesize this variable?
#implementation KVC
#synthesize progressString = _progressString;
You have defined your object frickenHeck as class KVC which holds a property called progressString, that you are making available to other classes via this call.
#property (nonatomic, retain) NSString *progressString;
Assuming you have synthesized the variable in your #implementation file, why don't you just call:
frickenHeck.progressString = #"Testing";
or
frickenHeck.progressString = #"Completed";
Sure you can set the variable via Key Value Coding, but not by setting to the private form of your class variable. Try:
[frickenHeck setValue:#"Completed" forKey:#"progressString"];
So, have you synthesized this variable? Or at least set a accessor setter/getter for the variable? You typically only want to do one or the other.
Header:
- (void)progressString;
- (NSString *)setProgressString:(NSString *)_string;
Implementation:
- (void)progressString {
return _progressString;
}
- (NSString *)setProgressString:(NSString *)_string {
_progressString=_string;
}
Also to note that if you are going to be changing this variable a lot, you may want to use the NSMutableString form of the class, and set the #property declaration to copy. #property (nonatomic, copy) NSMutableString *progressString;
I hope some of this information assists you on your journey..
Mark
I have two UINavigationController in the appdelegate.h
{
UINavigationController *leftView;
UINavigationController *rightView;
UIWindow *window;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet UINavigationController *leftView;
#property (nonatomic, retain) IBOutlet UINavigationController *rightView;
appdelegate.m
#synthesize leftView;
#synthesize rightView;
then in a different class
test.m
#import "appdelegate.h"
if I do:
[self leftView] pushViewController...; //(Everything is ok)
but if I change it to:
[self rightView] pushViewControll...; //it complains about ViewController may not respond to -rightView
You code seems right; what doesn't seem right is that you're including AppDelegate. If the code was in AppDelegate.m, it would probably work without any complaints by the compiler.
Instead, you've defined #property lines for each, but that is in AppDelegate.h, not test.h - but you're using them in test.m. That is probably the source of the problem.
Interestingly, does the code actually run?
I'm going to hazard a guess: Have you declared and synthesized a property for rightView, or at least provided your own manual getter?
It sounds like you declared a #property or method called leftView that returns the leftView ivar, but you forgot to do the same for rightView. The error is telling you that self doesn't respond to the selector rightView.