I'm trying to make a Mac app by following a tutorial but Xcode comes up with the error property 'window' not found on object of type AppDelegate.
My code is
#import "AppDelegate.h"
#include "MasterViewController.h"
#interface AppDelegate()
#property (nonatomic,strong) IBOutlet MasterViewController *masterViewController;
#end
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
// 1. Create the master View Controller
self.masterViewController = [[MasterViewController alloc] initWithNibName:#"MasterViewController" bundle:nil];
// 2. Add the view controller to the Window's content view
[self.window.contentView addSubview:self.masterViewController.view];
self.masterViewController.view.frame = ((NSView*)self.window.contentView).bounds;
}
- (void)applicationWillTerminate:(NSNotification *)aNotification {
// Insert code here to tear down your application
}
#end
I don't know what this means or how to fix it.
Under #interface try adding:
#property (weak) IBOutlet NSWindow *window;
The error suggestions you haven't set the property for your window.
When create a project, uncheck the option "Use Storyboards". XCode will create a "window" property for you. See uncheck "Use Storyboards".
Related
I just like to play with coding for a hobby, so probably a noob question;
I have a simple storyboard for MacOS with 2 views. Both have there own classes (main class and subclass). How can I control a outlet in the subclass from the main class?
for example
I have a button (IBAction) in the mainclass and a textfield (IBOutlet) in the subclass. I want to set the stringvalue for the textfield with a click on the button in main.
I have searched a lot last days but just don't get it. (or just need a push in the right direction)
EDIT after JingJingTao's answer:
I used the control-drag function to open the second window.
I tried the code JingJingTao gives, but the textfield doesn't respond to the action.
My classes look like this now:
ViewController.h
#import <Cocoa/Cocoa.h>
#interface ViewController : NSViewController
- (IBAction)newText:(id)sender;
#end
ViewController.m
#import "ViewController.h"
#import "ViewController2.h"
#interface ViewController ()
#property (nonatomic) ViewController2 *subclass;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
- (void)setRepresentedObject:(id)representedObject {
[super setRepresentedObject:representedObject];
}
- (void)newText:(id)sender {
self.subclass.textField.stringValue = #"button pressed";
}
#end
ViewController2.h
#import "ViewController.h"
#interface ViewController2 : ViewController
#property (nonatomic) IBOutlet NSTextField *textField;
#end
ViewController2.m
#import "ViewController2.h"
#interface ViewController2 ()
#end
#implementation ViewController2
- (void)viewDidLoad {
[super viewDidLoad];
}
#end
Update:
I've attached two screenshots of what it looks like in the storyboard for the first suggestion,
1) Add a view to your ViewController, set the class at the top right to 'YourView', 'YourView' is a just an NSView, add a textfield to it and hook it up.
2) Add YourView as a property to your ViewController, i.e. #property (nonatomic) IBOutlet NSView *yourView; and hook it up.
Let me know if there are any issues.
You just need to put the textfield in the public interface of your subclass, so you can access it in your main class, although it does sound like you're using inheritance and I don't think you need to but that's another topic :D.
Example:
In MainClassViewController.m
#interface MainClassViewController ()
#propert (nonatomic) Subclass *subclass;
#end
#implementation MainClassViewController
// I guess you already add your subclass to the main viewcontroller because they display on the same screen.
- (void)yourButtonTapMethod {
self.subclass.textfield.text = #"Your value";
}
In Subclass.h
#interface Subclass : NSObject
#property (nonatomic) IBOutlet UITextfield *textfield;
I use Cocoa Touch instead of Cocoa, so maybe it's NSTextfield for you. Please let me know if this does not answer your question, good luck.
what I'm basically trying to make is a very simple program that can switch back and forth between 2 views on a single window.
When the program loads there is a window with a custom view that contains a login button. When clicked, the view changes to a second custom view that contains a label and a logout button. I have this much working.
What I can't figure out is how to get the logout button to bring me back to the first view.
Here is the code for the AppDelegate class where i have the button method to switch the view:
header:
#import <Cocoa/Cocoa.h>
#interface AppDelegate : NSObject <NSApplicationDelegate>
#property (weak) IBOutlet NSWindow *window;
#property (weak) IBOutlet NSView *loginView;
- (IBAction)loginButtonClicked:(id)sender;
#end
implementation:
#import "AppDelegate.h"
#import "myCustomView.h"
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
// Insert code here to initialize your application
}
- (void)applicationWillTerminate:(NSNotification *)aNotification {
// Insert code here to tear down your application
}
- (IBAction)loginButtonClicked:(id)sender {
[_loginView removeFromSuperview];
myCustomView *new = [[myCustomView alloc]initWithNibName:#"myCustomView" bundle:nil];
[[[self window]contentView]addSubview:[new view]];
}
#end
This is the code for my custom class that is a subclass of NSViewController.
header:
#import <Cocoa/Cocoa.h>
#class AppDelegate;
#interface myCustomView : NSViewController
#property (strong) IBOutlet NSView *logoutView;
- (IBAction)logoutButtonClicked:(id)sender;
#end
implementation:
#import "myCustomView.h"
#implementation myCustomView
- (void)viewDidLoad {
[super viewDidLoad];
// Do view setup here.
}
- (IBAction)logoutButtonClicked:(id)sender {
[_logoutView removeFromSuperview];
myCustomView *newController = [[myCustomView alloc]initWithNibName:#"MainMenu" bundle:nil];
[[[self window]contentView]addSubView:[newController view]];
//this does not work. No visible #interface for 'myCustomClass' declares the selector 'window'
}
#end
The button method to go back to the login page is where I'm stuck. Even though I've added the header file for AppDelegate into myCustomClass I cannot use the instance of NSWindow. What am I doing wrong here? Am I at least on the right track? any help here is greatly appreciated.
I also tried using #class instead of #import, but still can't use the instance of NSWindow from AppDelegate.
Here are the pictures of my two xib files:
[][1
UPDATE: The suggestions from Paul Patterson in his comments were very helpful, but haven't solved my problem. For now what I am doing to get my project to work is putting the buttons in the window instead of the views and then hiding them when i don't need them. This works and I can switch back and forth, however I still can't figure out how to use a button on a custom view itself to load a different view onto the same window.
Running into a simple problem and not quite sure what is causing it. Linked a NSButton up to a ViewController xib. The property is referenced and then I linked up the IBAction to the view controllers view. I'm getting a crash whenever I press the button with an unrecognized selector message. I know I'm doing something wrong but on iOS this is pretty standard.
Here is the code:
#import "AppDelegate.h"
#interface AppDelegate ()
#property (weak) IBOutlet NSWindow *window;
#end
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
// Insert code here to initialize your application
IPVLocationViewController *mainViewController = [[IPVLocationViewController alloc]initWithNibName:#"IPVLocationViewController" bundle:nil];
self.window.contentView = mainViewController.view;
}
- (void)applicationWillTerminate:(NSNotification *)aNotification {
// Insert code here to tear down your application
}
#end
#import "MainViewController.h"
#interface MainViewController ()
#property (weak) IBOutlet NSButton *mainButton;
#end
#implementation MainViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do view setup here.
}
- (IBAction)mainClick:(id)sender {
NSLog(#"THE BUTTON WAS CLICKED");
}
#end
In your Nib , it looks like your view controller instance is of type NSViewController instead of MainViewController.
So select the view controller in your Nib (or storyboard), and change its type to MainViewController.
Of course, if this view controller isn't being loaded from a nib or storyboard, then just check where you create it and make sure you created an instance of the correct class.
Solved it:
The accepted answer in this post helped me:
Needed to hold a reference to the view controller in the AppDelegate.
#interface AppDelegate ()
#property (nonatomic, strong) MainViewController *mainViewController;
#property (weak) IBOutlet NSWindow *window;
#end
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
// Insert code here to initialize your application
self.mainViewController = [[MainViewController alloc]initWithNibName:#"MainViewController" bundle:nil];
self.window.contentView = self.mainViewController.view;
}
- (void)applicationWillTerminate:(NSNotification *)aNotification {
// Insert code here to tear down your application
}
#end
I just started a new Cocoa project after a long time... And I don't know why, but I always get an error when calling a xib by a NSWindowController. What I do is really very simple: I have a new project as a starting point and then I don't wantz to call the xib from Appdelegate, but from a subclass of NSWindowController. Then the output tells me that:
2014-11-12 09:58:18.519 SimpleTest[8554:378690] ApplePersistence=NO
2014-11-12 09:58:18.671 SimpleTest[8554:378690] Failed to connect (window) outlet from (NSApplication) to (NSWindow): missing setter or instance variable
Okay, how does it look in code? My Appdelegate looks like this:
#import "AppDelegate.h"
#import "MainWindowController.h"
#interface AppDelegate ()
#property (weak) IBOutlet NSWindow *window;
#property (strong) MainWindowController *mainWindowController;
#end
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
_mainWindowController = [[MainWindowController alloc] initWithWindowNibName:#"MainMenu"];
[self.mainWindowController showWindow:self];
}
#end
Nothing special so far. The MainWindowController looks like this:
#import "MainWindowController.h"
#interface MainWindowController ()
#property (weak) IBOutlet NSWindow *window;
#end
#implementation MainWindowController
- (id)initWithWindow:(NSWindow *)window
{
self = [super initWithWindow:window];
if (self != nil)
{
//do something
}
return self;
}
#end
And again very simple... Additiponally I have some modifications in IB: File'Owner of MainMenu.xib becomes MainWindowController. Its 'window' outlet is connected to the Window of the application. The delegate of Window is connected to File's Owner. Well, that's it! But why do I receive this error? What am I doing wrong?
---EDIT---
this shows the connections in IB
The most important is using right selector to create new instance and having all wired up correctly.
Steps:
1. Add new xib with window or an empty one and add window to it
2.Select File owner and set it to NSWindowController or its subclass.
Select window and connect it to File owner
Make new NSWindowController instance
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
NSWindowController *windowController = [[NSWindowController alloc] initWithWindowNibName:#"Window"];
[NSApp runModalForWindow:[windowController window]];
}
I am trying to improve myself in Objective-C and what I am on about is now modifying and changing and existed project. I did everything I wanted expect one thing. Theres an info button in my program and it doesnt related with .xib file. I tried to remove it but always my main.m gave error like SIGABRT (int retval thing.)
Here is the thing what I want to modify
http://i.stack.imgur.com/ZG51s.png // The picture of my program and info button
I am trying to remove the (i) button on the right-down corner.
Here's my code
This is my RootViewController.h
#import <UIKit/UIKit.h>
#class MainViewController;
#interface RootViewController : UIViewController {
IBOutlet UIButton *infoButton; //Silinecek
MainViewController *mainViewController;
}
#property (nonatomic, retain) MainViewController *mainViewController;
#end
This is my RootViewController.m
#import "RootViewController.h"
#import "MainViewController.h"
#implementation RootViewController
#synthesize mainViewController;
- (void)viewDidLoad {
MainViewController *viewController = [[MainViewController alloc] initWithNibName:#"MainView" bundle:nil];
self.mainViewController = viewController;
[viewController release];
[self.view insertSubview:mainViewController.view belowSubview:infoButton];
}
and also I tried to modify my AppDelegate h and m. Here they are ;
#import <UIKit/UIKit.h>
#class RootViewController;
#interface AppDelegate : NSObject <UIApplicationDelegate> {
IBOutlet UIWindow *window;
IBOutlet RootViewController *rootViewController;
}
#property (nonatomic, retain) UIWindow *window;
#property (nonatomic, retain) RootViewController *rootViewController;
#end
#import "AppDelegate.h"
#import "RootViewController.h"
#implementation AppDelegate
#synthesize window;
#synthesize rootViewController;
- (void)applicationDidFinishLaunching:(UIApplication *)application {
[window addSubview:[rootViewController view]];
//[window makeKeyAndVisible];
}
/*
- (void)dealloc {
[rootViewController release];
[window release];
[super dealloc];
}
*/
What should I do for removing that info button in my View. Thanks for the any tips
And if you are interested in this is the whole algorithm : http://pastebin.com/hHQkQYS6
Do you still have the control linked somewhere in your xib file? It is declared as an IBOutlet control. Usually when I have these controls I will use the GUI link this control in some way (I can't remember what exactly as I have not done Obj-C in a long time). But I would definitely have a look around you xib file (as well as removing [self.view insertSubview:mainViewController.view belowSubview:infoButton];
The exception mentions:
[<RootViewController 0x4b9ab20> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key infoButton.
The call stack shows that it is thrown by UINib. So this is happening during nib load. So check for all objects present, carefully, in the nib and remove the info button