I'm working on my first Mac app and I'm having some trouble with getting my NSView and it's delegate methods to work. I have a NSViewController that should response to mouse events, i.e mouseDown. This didn't work, instead I created a custom NSView subclass that looks like this:
// Delegate method
#protocol CanvasViewDelegate
- (void)mouseDown:(NSEvent *)event;
#end
#interface CanvasView : NSView
{
id delegate;
}
#property (nonatomic, strong) id delegate;
#end
#implementation CanvasView
#synthesize delegate;
- (void)mouseDown:(NSEvent *)event
{
[delegate mouseDown:event];
}
The NSViewController relevant parts that should act as the NSView's delegate looks like this:
#import "CanvasView.h"
#interface PaintViewController : NSViewController <CanvasViewDelegate>
{
CanvasView *canvasView;
}
#property (strong) IBOutlet CanvasView *canvasView;
#end
#synthesize canvasView;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
canvasView = [[CanvasView alloc] init];
canvasView.delegate = self;
}
return self;
}
- (void)mouseDown:(NSEvent *)event
{
NSLog(#"Down");
}
Now, the method mouseDown doesn't get called, what am I doing wrong?
If you want an NSView subclass to accept events, you will have to implement:
- (BOOL)acceptsFirstResponder {
return YES;
}
as documented here.
Creating the view programmatically instead did work. Like this:
NSRect canvasRect = self.view.frame;
canvasView = [[CanvasView alloc] initWithFrame:canvasRect];
[self.view addSubview:canvasView];
canvasView.delegate = self;
Related
I have an OS X application with a main view (i.e., self.view) that contains an NSScrollView and the NSScrollView contains a custom NSView. The custom NSView (flippedNSView) is just an NSView custom class FlippedNSView with a -(BOOL)isFlipped { return YES; }
I have a function that creates a NSButton that is called in the ViewDidLoad.
If button is added to self.view, button works fine
If button is added to flippedNSView, button does not respond.
NSTextViews work fine and respond to MouseDown events, although they do not respond to text selection. Only the buttons do not respond.
Any ideas?
AppDelegate.h
#import "CodeObjViewController.h"
#interface AppDelegate : NSObject <NSApplicationDelegate> {
FlippedView *flippedNSView;
}
// Windows are defined in MainMenu.xib with the following hierarchy
// Window
// |_ View
// |_ flippedNSView
// |_ scrollView
// |_ myCustomView
#property (assign) IBOutlet NSWindow *window;
#property (strong) IBOutlet NSViewController *myViewController;
#property (weak) IBOutlet NSView *myCustomView;
#property(readwrite, strong, nonatomic) IBOutlet NSScrollView* scrollView;
#property(readwrite, strong, nonatomic) IBOutlet FlippedView * flippedNSView;
#end
AppDelegate.m
#import "AppDelegate.h"
#interface AppDelegate ()
#end
#implementation AppDelegate
#synthesize scrollView;
#synthesize flippedNSView;
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
_myViewController = [[CodeObjViewController alloc] initWithNibName:#"customViewController" bundle:nil];
[_myCustomView addSubview:[_myViewController view]];
[[_myViewController view] setFrame:[_myCustomView bounds]];
[scrollView setDocumentView: flippedNSView];
}
customViewController.h
#interface FlippedView : NSView
#end
//----------------------------------------------------------
#interface CodeObjViewController : NSViewController {
FlippedView *flippedNSView;
NSScrollView *scrollView;
}
customViewController.m
#implementation FlippedView
- (id)initWithFrame:(NSRect)frame {
self = [super initWithFrame:frame];
return self;
}
//----------------------------------------------------------
- (BOOL)isFlipped {
return YES;
}
#end
//----------------------------------------------------------
#implementation customViewController
// Custom View Controller
-(void) viewDidLoad {
// The scroll and flipped views are defined on menu.xib and declared on the AppDelegate.
AppDelegate *theAppDelegate = (AppDelegate*) [NSApplication sharedApplication].delegate;
flippedNSView = theAppDelegate.flippedNSView;
scrollView = theAppDelegate.scrollView;
NSButton *button = [[NSButton alloc] initWithFrame:NSMakeRect(0,0,10,10)];
[self.view addSubview:helpButton]; // THIS RESPONDS TO MOUSE DOWN
[flippedNSView addSubview:helpButton]; // THIS DOES NOT RESPOND TO MOUSE DOWN
[button setAction:#selector(buttonClicked:)];
[button setTarget:self];
}
-(void) buttonClicked : (id) sender {
NSLog(#"Button clicked");
}
I am using XCode 6 on OS X 10.10 and have a storyboard containing a window with a split view controller, as shown in the following image.
The split view controller (highlighted in the image) is an instance of MyViewController, which has the following code:
MyViewController.h
#import <Cocoa/Cocoa.h>
#interface MyViewController : NSSplitViewController <NSTableViewDataSource>
#end
MyViewController.m
#import "MyViewController.h"
#implementation MyViewController
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
return 7;
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
return [NSString stringWithFormat:#"%ld", (long)row];
}
#end
I would like to make the view controller the dataSource of the NSTableView in my storyboard, however I am unable to connect them. Is there a reason for this?
In your NSSplitViewController-subclass viewDidLoad-method set the data source programmatically. You need to implement the child view controller class as well (with the tableView outlet connected to the control).
MySplitViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
for (NSSplitViewItem *item in self.splitViewItems)
{
NSViewController *controller = item.viewController;
if ([controller isKindOfClass:[MyChildController class]])
{
MyChildController *myController = (MyChildController *)controller;
myController.tableView.dataSource = self;
[myController.tableView reloadData];
}
}
}
But to tell you the truth I don't like this approach. It's more better when the table view's data source methods are in the native view controller class.
Another way to do that. MyChildController.h file:
#class MyChildViewController;
#protocol MyChildControllerDelegate <NSObject>
- (void)childController:(MyChildViewController *)controller didSelectRowAtIndex:(NSUInteger)index;
#end
#interface MyChildViewController : NSViewController <NSTableViewDataSource, NSTableViewDelegate>
#property (nonatomic, weak) id<MyChildControllerDelegate> delegate;
#property (nonatomic, retain) NSArray *items;
#property (nonatomic, weak) IBOutlet NSTableView *tableView;
#end
Don't forget to implement all the table view dataSource and delegate methods you need. MySplitViewController.m file:
- (void)viewDidLoad
{
[super viewDidLoad];
for (NSSplitViewItem *item in self.splitViewItems)
{
NSViewController *controller = item.viewController;
if ([controller isKindOfClass:[MyChildController class]])
{
MyChildController *myController = (MyChildController *)controller;
myController.delegate = self;
[myController setItems:_items];
}
}
}
I have a NSWindowController where I'm adding my corresponding ViewControllers. I would like to handle touch events in one of the ViewController. My class is
Window.h
#interface WindowController : NSWindowController<NSToolbarDelegate>
#property (nonatomic, strong) NSViewController *currentViewController;
#property (assign) IBOutlet NSView *targetView;
#end
Window.m
-(void)addViewController
{
NSViewController *currentController = [[currentControllerClass alloc]initWithNibName:controllerIdentifier bundle:nil];
self.currentViewController = currentController;
[self.targetView addSubview:self.currentViewController.view];
[self.currentViewController.view setFrame: [self.targetView bounds]];
}
-(void) awakeFromNib{
[super awakeFromNib];
[self.window setIgnoresMouseEvents:NO];
[self setToolbarToPracticeView];
}
-(void)mouseDown:(NSEvent *)theEvent
{
NSLog(#"Window > Mouse down");
}
I'm able to print the mousedown event here. Now I have a viewController, which is
ViewController.h
#interface ViewController : NSViewController
#end
ViewController.m
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
}
return self;
}
-(void)awakeFromNib
{
[self.view setAcceptsTouchEvents:YES];
}
-(BOOL)acceptsFirstResponder
{
return YES;
}
-(void)mouseDown:(NSEvent *)theEvent
{
NSLog(#"ViewController > mouse down");
}
I would like to get the control of the mouseDown in the ViewController. Am I missing something here?
Thanks.
Create a Custom NSView and then delegate a mouseDown method in it's protocol. Import and use the customView in the ViewController and delegate its methods. When you click on the view a mouseDown event triggers.
Not sure of my answer, but if you don't call [super mouseDown:theEvent] in the Window.m (which should be called WindowController.m by the way), you are breaking the responder chain. Hence your view controller can't see it. Am I right?
I am very new to MAC OSX app development.
In my application I have three NSViewControllers, which are PracticeController, NoteController and QuestionController. I have to navigate to NoteViewController from PracticeController and QuestionController and comeback to the viewController from which NoteController has navigated.
For example: when we navigate to NoteController from PracticeController, then when we tap on back button from NoteController I have to come to PracticeController, and when we navigate to NoteController from QuestionController, then when we tap on back button from NoteController I have to come to QuestionController.
Please help me how to do this? I am badly searching for it. Thanks.
well, after a long time search, I found a open source library which ports the UIKit to MacOSX.
https://github.com/BigZaphod/Chameleon.git
But it's too complicated for me, so I wrote my own Navigation controller.
NSNavigationController.h
#import <Cocoa/Cocoa.h>
#class BaseViewController;
#interface NSNavigationController : NSResponder
#property (nonatomic, strong) BaseViewController *rootViewController;
- (id)initWithRootViewController:(BaseViewController *)rootViewController;
- (NSView*)view;
- (void)pushViewController:(BaseViewController *)viewController animated:(BOOL)animated;
- (BaseViewController *)popViewControllerAnimated:(BOOL)animated;
#end
NSNavigationController.m
#import "NSNavigationController.h"
#import "AppDelegate.h"
#import "BaseViewController.h"
#interface NSNavigationController ()
#property (nonatomic, strong) NSMutableArray *viewControllerStack;
#end
#implementation NSNavigationController
- (id)initWithRootViewController:(BaseViewController *)rootViewController
{
self = [super init];
if (self) {
self.rootViewController = rootViewController;
self.rootViewController.navigationController = self;
self.viewControllerStack = [[NSMutableArray alloc] initWithObjects:self.rootViewController, nil];
}
return self;
}
- (NSView*)view
{
BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
return topViewController.view;
}
- (void)pushViewController:(BaseViewController *)viewController animated:(BOOL)animated
{
if (viewController != nil) {
[self removeTopView];
[self.viewControllerStack addObject:viewController];
viewController.navigationController = self;
[self addTopView];
}
}
- (BaseViewController *)popViewControllerAnimated:(BOOL)animated
{
BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
[self removeTopView];
[self.viewControllerStack removeLastObject];
[self addTopView];
return topViewController;
}
- (void)removeTopView
{
BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
[topViewController.view removeFromSuperview];
}
- (void)addTopView
{
BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
AppDelegate *delegate = (AppDelegate*)[NSApp delegate];
[delegate.window.contentView addSubview:topViewController.view];
}
#end
BaseViewController.h
#import <Cocoa/Cocoa.h>
#class NSNavigationController;
#interface BaseViewController : NSViewController
#property (nonatomic, weak) NSNavigationController *navigationController;
#end
BaseViewController.m
#import "BaseViewController.h"
#interface BaseViewController ()
#end
#implementation BaseViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
}
return self;
}
#end
It's the simplest NavigationController. I didn't implement the view animation. Hope it can help.
I have tried many possibilities I found on this site and read some explanations
from apple developer page, but seems like i couldn't resolve my problem about
loading NSViewController with/form NIB.
Files on Xcode Project look a bit like this :
SecondViewController.h
SecondViewController.m
SecondViewController.xib
AppDelegate.h
AppDelegate.m
MainMenu.xib
The main problem is how could i create the SecondViewController programatically with
the initial nib on SecondViewController.xib
Custom class of FileOwner on MainMenu.xib is NSApplication
Custom class of FileOwner on SecondViewController.xib is SecondViewController
There are some panels and window in MainMenu.xb (about window and preference panel)
This application has no main window (using notification icon on status bar)
SecondViewController.h
#interface SecondViewController : NSViewController {
BOOL fullScreenMode;
NSImageView *fullScreenbg;
NSImageView *imageView1;
NSImageView *imageView2;
NSPanel *imageWindow;
}
#property (assign) IBOutlet NSImageView *fullScreenbg;
#property (assign) IBOutlet NSImageView *imageView1;
#property (assign) IBOutlet NSImageView *imageView2;
#property (assign) IBOutlet NSPanel *imageWindow;
SecondViewController.m
#implementation SecondViewController {
NSImageView *nv1;
NSImageView *nv2;
NSSize curImgSize;
}
#synthesize fullScreenbg;
#synthesize imageView1;
#synthesize imageView2;
#synthesize imageWindow;
......
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
fullScreenMode = YES;
}
return self;
}
AppDelegate.h
#interface AppDelegate : NSObject <NSApplicationDelegate,NSWindowDelegate> {
NSPanel *aboutWindow;
IBOutlet NSMenu *myStatusMenu;
IBOutlet NSMenuItem *toggleFullScreen;
}
AppDelegate.m
#implementation AppDelegate {
SecondViewController *controller;
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
controller = [[SecondViewController alloc]
initWithNibName:#"SecondViewController"
bundle:nil];
//Not work (fullscreenbg, imageView1, imageView2,imageWindow = nil)
//controller = [[SecondViewController alloc] init]; ?? <-- didn't work either
}
Even if using initWithNibName or just init, all the IBOutlet properties seems to be nil
on debug.
i've tried other solustions like "NSBundle loadNibNamed" or using loadView but it didn't work (warning message : "NSObject my not respond to loadView").
The main purpose of the secondViewController is to display notification message including
graphics and web element.
I hope someone could give me a best suggestion. Thanks.
This is normal behavior. IBOutlets are not connected in the constructor.
You can override viewDidLoad, call super and then do any initialization.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
//added this line :
if (nibBundleOrNil!=nil || ![nibBundleOrNil isEqualtoString:#""]) {
[NSBundle loadNibNamed:#"SecondViewController" owner:self];
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
fullScreenMode = YES;
}
return self;
}