I have three IBActions, each linked with it's own button like so:
#import "Controller.h"
#import "Application.h"
#implementation Controller
- (IBAction)deal:(id)sender {
NSButton *deal = (NSButton *)sender;
...
}
- (IBAction)hit:(id)sender {
NSButton *hit = (NSButton *)sender;
...
}
- (IBAction)stay:(id)sender {
NSButton *stay = (NSButton *)sender;
...
}
#end
How do you use/call on a button outside it's scope? I'm looking to do something like this:
- (IBAction)hit:(id)sender {
NSButton *hit = (NSButton *)sender;
...
[hit setEnabled: NO];
[stay setEnabled: NO]; // Using/altering "Stay's" button
}
Thanks in advance!
IBAction is a typedef of void, used to flag up methods that you want Interface Builder (or Xcode 4's interface designer to spot. They're just ordinary methods with no outward link to anything.
What you probably want is some IBOutlets to connect out to the button. E.g. to connect to the hit button, you'd add this to your #interface:
IBOutlet NSButton *hit;
Then in Interface Builder or Xcode you should be able to control-drag a link from your class out to the button and connect the outlet — the opposite of what you've been doing to connect the button events to your class, effectively.
Because hit is an instance variable, you can access it from any method in your class.
You can declare a NSButton property as IBOutlet in your view controller and then in the Interface Builder you can link your button with it.
Something like:
#property (nonatomic, assign) IBOutlet NSButton * button;
Related
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.
I'm new to objective-c programming and I'm trying to make a status bar application right now.
I only know how to set a dropdown menu to show when click on the status bar item.
However, what I want is to show a panel when left clicked and show the menu when right clicked, just like the way Bartender 2 acts.
I've referred this demo but I could hardly figure out what it does.
I use xib to build my UI. I have three .xib files: MainMenu, Preferences and MainPanel.
AppDelegate.h
#import <Cocoa/Cocoa.h>
#interface AppDelegate : NSObject <NSApplicationDelegate>
#property NSStatusItem *statusItem;
#end
AppDelegate.m
#import "AppDelegate.h"
#import "Menu.h" //Menu is a ViewController for Menu.xib
#interface AppDelegate ()
//#property (weak) IBOutlet NSWindow *window; //I don't know what is this for
#end
#implementation AppDelegate
#synthesize statusItem;
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
// Insert code here to initialize your application
}
- (void)applicationWillTerminate:(NSNotification *)aNotification {
// Insert code here to tear down your application
}
//I initiate my statusItem here
-(void)awakeFromNib{
self.statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];
self.statusItem.title = #"T";
// you can also set an image
//self.statusBar.image =
self.statusItem.highlightMode = YES;
//I tried to use these code to set the left click action
[statusItem setTarget:self];
[statusItem setAction:#selector(showMenu:)];
}
-(void)showMenu{
Menu* menuVC = [[Menu alloc] initWithNibName:#"Menu" bundle:nil];
//Don't know what to do next...
}
#end
I tried to use
[menuVC showWindow];
but it is not right.
See this post for information about drawing an NSMenu at a given NSPoint (use popUpContextMenu:withEvent:forView: instead of showWindow).
I'll also point out that in the example you linked, the author modularizes his project into different components, following the MVC pattern. There is a component for the menu controller and view (it doesn't look like he just displays an NSMenu), as well as the panel controller and view. You may want to think about how you can organize your project to follow the conventions of MVC.
I'm trying to make a bird jump by pressing a button. But i have not idea how to do that. I created a timer but i don't know how to use that.
int birdFlight;
#interface BirdViewController : UIViewController
{
IBOutlet UIButton *flyButton;
IBOutlet UIImageView *bird;
NSTimer *birdMovement;
}
-(IBAction)buttonBirdFly:(id)sender;
#end
How to use this method?
#implementation BirdViewController
-(IBAction)buttonBirdFly:(id)sender
{
}
Im surprised that this hasn't already been asked:
But how does one go about changing the NSMenuItem title in a NSStatusBar menu. When a user logs in I want the menu item to say logout. I have tried creating an outlet to modify my NSMenuItem as a would a label or something.
AppDelegate.h
#property (retain) IBOutlet NSMenuItem *loginItem;
AppDelegate.m
[loginItem setTitle:#"Logout"];
But that didnt work.
The only thing that I was able to do was delete the old NSMenuItem, then add a new one, but it would just add it to the bottom. Is the only way to do this to remove every menu item then re-add them?? That seems very inefficient.
The method you describe should work, though, in general, keeping IBOutlets for all your menu items can be tedious. (If your solution isn't working, make sure the IBOutlet is actually connected in the nib file, and make sure that you're setting the title at an appropriate time. If you're trying to set it in your controller's init method, for example, that's too early on, and the outlets haven't yet been connected up: move the method to awakeFromNib or similar.
A better approach in the long run is to use the <NSMenuDelegate> protocol and NSMenuValidation (informal) protocol to update menu items dynamically (and lazily).
For example, define your controller class like the following:
#interface MDAppDelegate : NSObject <NSApplicationDelegate, NSMenuDelegate>
#property (strong) NSStatusItem *statusItem;
#property (weak) IBOutlet NSWindow *window;
#property (weak) IBOutlet NSMenu *statusItemMenu;
#property (weak) IBOutlet NSMenuItem *toggleLoginLogoutMenuItem;
#property (weak) IBOutlet NSTextField *statusField;
#property (weak) IBOutlet NSTextField *progressField;
#property (weak) IBOutlet NSProgressIndicator *progressIndicator;
#property (assign) BOOL loggedIn;
- (IBAction)toggleLoginLogout:(id)sender;
#end
In the nib file, the delegate outlet of the statusItemMenu is set to the MDAppDelegate controller class. That assures that the MDAppDelegate class is in the responder chain and allow it to work with validating the menu items.
Then you could implement your .m like the following:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
_statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];
_statusItem.menu = _statusItemMenu;
_statusItem.title = NSLocalizedString(#"NSStatusItem", #"");
[self updateLoggedInStatus];
}
- (void)updateLoggedInStatus {
[self.statusField setStringValue:(self.loggedIn ? #"Logged in" : #"Logged out")];
}
- (IBAction)toggleLoginLogout:(id)sender {
[self performSelector:#selector(finishFakeLoginLogout:)
withObject:nil afterDelay:2.0];
}
- (void)finishFakeLoginLogout:(id)sender {
self.loggedIn = !self.loggedIn;
[self updateLoggedInStatus];
}
- (void)menuNeedsUpdate:(NSMenu *)menu {
#if MD_DEBUG
NSLog(#"[%# %#]", NSStringFromClass([self class]), NSStringFromSelector(_cmd));
#endif
}
- (BOOL)validateMenuItem:(NSMenuItem *)menuItem {
#if MD_DEBUG
NSLog(#"[%# %#]", NSStringFromClass([self class]), NSStringFromSelector(_cmd));
#endif
SEL action = menuItem.action;
if (action == #selector(toggleLoginLogout:)) {
[menuItem setTitle:(self.loggedIn ? #"Logout" :#"Login")];
}
return YES;
}
Sample project: http://github.com/NSGod/NSStatusBarFinagler
You don't need to connect your menu item just try this..
NSMenuItem *menuItem = (NSMenuItem*) sender;
NSString *menuString = menuItem.title;
if ([menuString isEqualToString:#"Login"])
{
[menuItem setTitle:#"LogOut"];
}
NSMenuItem menuItem = (NSMenuItem) sender;
this line automatically collect the menu items in your app.
I've only programmed on the iPhone so far, so Cocoa is sort of confusing in certain ways for me. Here's where I've hit a snag. I wanted my window so that the background was invisible, and without a title-bar. Something like this:
Here's how I'm doing it:
I set my window's class to a custom window, which I've created like this:
CustomWindow.h
#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>
#interface CustomWindow : NSWindow {
#private
NSPoint initialLocation;
}
#property(assign)NSPoint initialLocation;
#end
CustomWindow.m
//trimmed to show important part
#import "CustomWindow.h"
#implementation CustomWindow
#synthesize initialLocation;
- (id)initWithContentRect:(NSRect)contentRect styleMask:(NSUInteger)aStyle backing:(NSBackingStoreType)bufferingType defer:(BOOL)flag {
// Removes the window title bar
self = [super initWithContentRect:contentRect styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO];
if (self != nil) {
[self setAlphaValue:1.0];
[self setOpaque:NO];
}
return self;
}
#end
Now, in my .xib file for this window I've added a custom view onto the window. I've set the view class to a custom class I've created that inherits from NSView. Here's how I'm setting that up:
MainView.h
#import <Cocoa/Cocoa.h>
#interface MainView : NSView {
#private
//nothing to see here, add later
}
#end
MainView.m
//trimmed greatly again to show important part
#import "MainView.h"
#implementation MainView
- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
- (void)drawRect:(NSRect)rect {
// Clear the drawing rect.
[[NSColor clearColor] set];
NSRectFill([self frame]);
}
#end
So here's my question. I've added a NSImageView to my custom view (MainView) in Interface Builder. However, for some reason I can't figure out how to connect this image view to an instance variable in my custom view. They seem like they can't be connected like I normally would if I was creating an iPhone app. Any ideas how this would be done?
You connect objects created in your XIB in Mac OS X the same way you do for iOS programs. Just add an NSImageView property to your main view, mark it as an IBOutlet and connect it up.
For example,
In MainView.h create a property for your NSImageView and make it an IBOutlet:
#import <Cocoa/Cocoa.h>
#interface MainView : NSView {
NSImageView *imageView;
}
#property(retain) IBOutlet NSImageView *imageView;
#end
In interface builder, make sure the class for the custom view is set to MainView, to do this click on the File's Owner object in the custom view XIB and then select the identity option in the inspector and enter MainView as the class type.
Next, CTRL+click File's owner and drag the arrow to the NSImageView and select the imageView outlet.
That's all there is to it. You should be able to reference the image view from code now.