I really haven't done much and i'm already stuck.
So far i've done:
added NSWindowController subclass (MikesWindowController.h & .m)
removed windowNibName from MikesDocument.m (since i'm implementing my own
WindowController subclass.)
I tried:
Tested if NSLog would come back at init, windowControllerDidLoadNib, applicationDidFinishLaunching. Only the NSLog at init printed.
And, tested the Main Menu -> File -> New after after compiling my Document app.
Am I implementing this right? Thanks. Any suggestions would be great! Under MikesDocument.m
-(void)makeWindowControllers{
MikesController *controller = [[MikesWindowController alloc]init];
[self addWindowController:controller];
}
After much deliberation I found that answer. Woohoo. Enjoy future.
removed initWithWindow from my NSWindowController subclass
implemented initWithWindowNibName to my NSWindowController subclass so now anytime I initialize I must specify the window nibName.
Below I implemented initWithWindowNibName in my NSWindowController subclass heres what it looks like:
MikesWindowController.m
-(id) initWithWindowNibName:(NSString *)windowNibName{
self = [super initWithWindowNibName:windowNibName];
return self;
}
(Below) Back again to the main document I corrected the makeWindowController method and instantiated my controller with "MikesDocument" (for MikesDocument.xib) and added it.
MikesDocument.m
-(void)makeWindowControllers{
MikesWindowController *controller =
// must tell controller which nib file to use.
[[MikesWindowController alloc]initWithWindowNibName:#"MikesDocument"];
[self addWindowController:controller];
}
Success! Don't even bother calling init or implementing init as it returns an error at any time.
Related
I'm trying to convert a project on macOS that uses Storyboards to instantiate a ViewController through a delegate, although I'm running into some difficulty trying to convert it to use a Nib instead.
Currently the storyboard version of the code uses an App Delegate which is associated with two View Controllers. When a button is clicked the front window animates and flips over revealing another (back) window. The code that instantiates the View Controller is:
mainWindow = [NSApplication sharedApplication].windows[0];
secondaryWindow = [[NSWindow alloc]init];
[secondaryWindow setFrame:mainWindow.frame display:false];
// the below is what I'm not sure of - how to reference nib instead of storyboard?
NSStoryboard *mainStoryboard = [NSStoryboard storyboardWithName:#"Main" bundle:[NSBundle mainBundle]];
NSViewController *vc = [mainStoryboard instantiateControllerWithIdentifier:#"BackViewController"];
[secondaryWindow setContentViewController:vc];
I'm not sure the proper way to reference a nib instead of a storyboard in the example shown above. The project I'm trying to convert is located here. I'm really hoping someone can help, thank you!
This is pretty easy to do. Just make an NSViewController subclass (or an NSWindowController subclass if you want it to control a whole window) for each of the two views. For each view, override -init and have it call super's implementation of -initWithNibName:bundle: with the name of the view's nib file:
#implementation MyViewController
- (instancetype)init {
self = [super initWithNibName:#"MyViewController" bundle:nil];
if (self == nil) {
return nil;
}
return self;
}
Note that if you can require a sufficiently recent version of macOS (I think it's 10.11 and higher off the top of my head, but it's possible that I could be off by a version or so), you don't even have to do this much, because NSViewController will automatically look for a nib file with the same name as the class.
Anyway, now you should be able to instantiate a MyViewController and insert its view into your view hierarchy, and manipulate it the same way you'd manipulate any other view:
MyViewController *vc = [MyViewController new];
[someSuperview addSubview:vc.view];
If you want to do windows instead, you can make an NSWindowController subclass instead of NSViewController. NSWindowController is slightly more annoying to use, since its initializers that take nib names are all convenience initializers, whereas the designated initializer just takes an NSWindow. So if you're using, say, Swift, you can't do it the way I did it above with NSViewController. Objective-C, of course, generally lets you do whatever you want, so you actually can get away with just calling super's -initWithWindowNibName:owner:, and I won't tell anyone, wink wink, nudge nudge. However, to be stylistically correct, you probably should just call -initWithWindow: passing nil, and then override windowNibName and owner:
#implementation MyWindowController
- (instancetype)init {
self = [super initWithWindow:nil];
if (self == nil) {
return nil;
}
return self;
}
- (NSNibName)windowNibName {
return #"MyWindowController";
}
- (id)owner {
return self;
}
This should get you a window controller that you can just initialize with +new (or +alloc and -init if you prefer), then call its -window property and manipulate the window as normal.
I want to be able to use a blue object box to delegate control over an NSOutlineView. The blue object box would be hooked up to my primary controller, so it'd just be a data source and control the content of the NSOutlineView.
The problem I'm having is that I have no control over the Channel Data Source. I'm simply calling a declared method with some test NSLog inside of it, and it doesn't get called. The outlet doesn't get instantiated.
Here's the connections of the blue object box (ChannelDataSource)
Here's the connections of File's Owner for my primary controller.
So you see, I want to do something like [dataSource callMyMethod]; with the final aim that I have control over the contents for the NSOutlineView.
Any ideas?
EDIT
The application is structured whereby my primarily app delegate looks like this:
#implementation MyAppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
controller = [[MainController alloc] init];
[controller showWindow];
}
#end
Then in the MainController I have something along the following lines:
#implementation MainController
-(id)init {
self = [super init];
if (self) {
// loads of random stuff
[dataSource myMethod];
}
return self;
}
So "Channel Data Source" blue object box is dataSource. At this point in the application life cycle, it's null, which isn't what I was expecting. At the same time, it's still a bit of black magic to me. If you have a blue object box, at what point is it instantiated? Obviously this isn't hooked up correctly though.
EDIT EDIT
Further to my points above, and trying to fix the problem, is this actually a good way to go about it? I'm looking at this thinking it's not meeting a decent MVC architecture, because ultimately the blue object box's owning class is storing and managing the data. Is there a better way to go about managing what's in your NSOutlineView?
EDIT EDIT EDIT
So I have my app delegate, which is strangely a class all by itself that instantiates the main controller. Don't ask me why I did this, it was very early code. So my app delegate (root entry point) has this:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
controller = [[MyController alloc] initWithWindowNibName:#"MainWindow"];
[controller showWindow:nil]; // this doesn't open the window
[controller loadWindow]; // this does open the window
}
And the declaration of the controller:
#interface MyController : NSWindowController
Which contains the following method declaration in it:
-(void)windowDidLoad {
[dataSource insertChannel:#"test" forServer:#"test2"];
}
I have a breakpoint in windowDidLoad and it definitely doesn't get called.
Ideas?
There's still a few things you didn't clarify, but I can do some guessing. First, I'm assuming that MainController is a subclass of NSWindowController. If so, you should be using initWithWindowNibName: instead of just init, otherwise how would the controller know what window to show when you address showWindow: to it? Second, even if you do that, and change your init method to initWithWindowNibNamed:, what your wrote won't work, because the init is too early in the process to see your outlet, datasource. If you just log dataSource it will come up null. A better place to put that code would be in windowDidLoad, as everything will have been set up by then (this will be called after showWindow:). So, in my little test project, this is what I did.
In the app delegate:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
self.cont = [[Controller alloc] initWithWindowNibName:#"Window"];
[self.cont showWindow:nil];
}
In the Controller.M I have this:
- (void)windowDidLoad {
NSLog(#"%#",self.dataSource);
[self.dataSource testMethod];
}
In IB, in the Window.xib file, I set the class of the file's owner to Controller, and the class of the blue cube to ChannelDataSource. EVerything was hooked up the same way you showed in your post.
I observed that viewDidLoad() is called before didFinishLaunchingWithOptions() and I am looking for something where I can put some initialization code that has to be called before viewDidLoad().
Is there such a place?
Also, it is acceptable to recall viewDidLoad() from other place. It should be ok, or too risky?
You are wrong.
Place a NSLog directly under the method header and you will see that ViewDidLoad is directly called after.
[self.window addSubview:self.yourViewController.view];
So, you either use viewDidLoad or alternatively and not really beautiful you could use.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
This even gets called before ViewDidload
There's
- loadView()
Kicks in before viewDidLoad() and comes with an advice to never be called directly after that.
Here's the link to the apple docs.
I had a similar problem once that was caused when I added the view controller I wanted added to the window using the MainWindow.xib file.
To get around this, I assigned the window's rootViewController (you can also call addSubView, but assigning the rootViewController is better) in the didFinishLaunchingWithOptions: method of the app delegate. Once you do this you can easily put whatever logic you want in front or behind where this happens. It puts you in full control of when your view controller loads. In contrast, when the view controller is loaded via the nib, it's difficult to execute code in front of it (if at all possible). I know you sepecify the main xib in the app's plist, but I don't know if there is a way to run code before that nib is loaded.
In general I avoid adding the view controller in the xib for this reason.
My code looks more like:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// special pre load logic here...
UIViewController *myVC = [[MyAwesomeViewController alloc] init];
self.window.rootViewController = myVC;
[myVC release];
// special post load logic here...
[self.window makeKeyAndVisible];
return YES;
}
You may do your app initializations in viewDidLoad, however don't do any boundaries or size settings here, as they are not yet set.
Do them in viewDidLayoutSubviews, which is called after viewDidLoad.
I found this article, which was very helpful to me:
The UIViewController lifecycle
You could put initialization code in the init method of the class.
And it's fine to call viewDidLoad again from elsewhere. It's just like any other method.
EDIT:
It's fine to call viewDidLoad - but you should be careful with memory management. If you're allocating objects in viewDidLoad, calling it again will cause leaks. So, because of the typical functionality of viewDidLoad, you might want to pull the code out into another method that you'll call repeatedly and call from viewDidLoad.
I'm stuck with the following. In a program, I'm trying to communicate between different classes (View Controllers with NIB files attached in a TabBar application etc). I want to call a method 'OMFG' in a class called 'ProductViewDetailController'. This class is a UIViewController (SplitViewDelegate). It's loaded programmatically.
Anyways, I've been trying to get the right call to this controller, and I came up with 2 solutions. One is declaring the productviewdetailcontroller in the caller's .h file and .m file, making an IBOutlet, linking it in the Interface builder and calling it directly by the line
[productDetailController OMFG];
When I call this method, it calls the right method in the ProductViewDetailController, but the instance of this viewcontroller differs from the one I programmatically can reach with this code:
for (UIViewController *controller in self.tabBarController.viewControllers) {
NSLog(#"%#", [controller class]);
if ([controller isKindOfClass:[UISplitViewController class]]) {
UISplitViewController *cell = (UISplitViewController *)controller;
for (UIViewController *controller2 in cell.viewControllers) {
NSLog(#"%#", [controller2 class]);
if ([controller2 isKindOfClass:[ProductViewDetailController class]]) {
[controller2 OMFG];
}
}
}
Which one should I use, and why?
edit: When I try to add a SubView to both viewcontrollers, the one where the call is [controller2 OMFG]; actually shows the newly added view, where the [productDetailController OMFG]; doesn't show the newly added view... Why is that? Is there a shorter (and more chique) way to get access to the right ViewController?
You should use a IBOutlet. This makes sure your app can still call the correct target if you later decide to change the hierarchy of view controllers, for example if creating an iPhone compatible setup without a UISplitViewController.
Calling isKindOfClass: in Objective-C is a sure sign that what you are doing is probably wrong. Firstly in Cocoa Touch what you do is always more important than who you are. Secondly what you try to do is probably peeking inside something that should be left private.
So I'm trying to do this exercise where I need to set a delegate for the main window. The purpose is to make sure that when the user resizes the window, it's always twice as wide as it is high.
This is my AppController.h file:
#import <Cocoa/Cocoa.h>
#interface AppController : NSObject
{
NSWindow *windowWillResize;
}
#end
and this is my AppController.m file:
#import "AppController.h"
#implementation AppController
- (id) init
{
[super init];
windowWillResize = [[NSWindow alloc] init];
[windowWillResize setDelegate:self];
return self;
}
- (NSSize) windowWillResize:(NSWindow *)sender
toSize:(NSSize)frameSize;
{
NSLog(#"size is changing");
return frameSize;
}
#end
However, I can remove the line
[windowWillResize setDelegate:self];
since I set the delegate in Interface Builder, but I'm not sure why this works.
How does windowWillResize know that I'm referring to the main application window since I'm doing a completely new
windowWillResize = [[NSWindow alloc] init];
I have a feeling that I am completely doing this wrong. Could someone point me in the right direction? Thanks!
Indeed, you don't need to create a NSWindow *windowWilResize since a newly created Cocoa app already has a main window. You don't need to implement an -init method either.
You only need to set you appController as a delegate of your main window in Interface Builder and to implement the -windowWillResize: method in your appController.
If you are familiar with french language, you can take a look at a blog entry I have written on this subject: Délégation en Cocoa.
You're leaking an instance of NSWindow. In -init you create an NSWindow instance. However, that is not used because when the NIB loads, it sets up all the connections that you specified in Interface Builder and you start using the window from the NIB instead. Do not create a window object in code - Interface Builder does it for you! :-)
In fact, it's not quite "instead"; your app controller is now the delegate for both NSWindow instances - the one that comes from the NIB and the one you instantiated in -init. However as the in-code NSWindow is never used anywhere else, it's still redundant and should be removed.
If you just want to maintain the aspect ratio of the window you can use either of these two NSWindow methods:
setAspectRatio:(NSSize)
setContentAspectRatio:(NSSize)
The first method locks the entire window size, including the title bar. The second one just the content. You can call this method during the initialization of your window inside the delegate (for example: -applicationDidFinishLaunching)