I've created a NSWindow with a PDFView in xib file, I created a controller called MainController, there, I created a ibaction -(IBAction) openFileAction:(id) sender, it uses the method
-(void) openFile:(NSString *) path{
NSLog(#"Opening File %#",path);
PDFDocument *pdfDoc = [[PDFDocument alloc] initWithURL:[NSURL fileURLWithPath:path]];
[pdfView setDocument: pdfDoc];
}
I linked the open menu item to openFileAction and pdf file is shown properly in PDFView after the click.
I'm doing a logic to receive a command line argument
-(MainController *) init{
[super init];
NSArray *myArgs = [[NSProcessInfo processInfo] arguments];
NSLog(#"pdf view %#", pdfView);
if ([myArgs count] >= 2 ){
[self openFile:[myArgs objectAtIndex:1]];
}
return self;
}
As you can see, I did an override in default constructor and in this context the pdfView is null then the file is not opened after the application/main Window load.
My question is, how can I open a pdf in a PDFView after the application load? Is there any hook to use after UI load?
If you want to do this when your window opens that your PDFView is in, use the windowDidLoad function in your MainController rather than trying to load it in init.
Thanks slycrel but windowDidLoad is a callback of NSWindowController. I found the solution by myself, the secret is
- (void) awakeFromNib{
//Do something after initialize UI components
}
All the best.
Related
I have different xib files with NSViewController attached to them. (Screenshot below)
One of xib file called StartMenuViewController which has a button. I want to click that button and change the view to DetectingUSBViewController.(Screenshot below)
The IBAction of that button is in StartMenuViewController.m file.
And I use AppController.m to control my main xib view.(NSWindow + NSView) (Screenshot below)
When the application runs, I try to initialize the StartMenuViewController fist by doing the following thing in my AppController.m file.
-(void)awakeFromNib{
[self initialize];
}
-(void) initialize
{
#autoreleasepool {
//mainViewController is a NSViewController and _mainView is a NSView which connect with Custom View in main xib
self.mainViewController = [[[StartMenuViewController alloc]initWithNibName:StartMenuView bundle:nil]autorelease];
[_mainView addSubview:[_mainViewController view]];
}
}
It works fine and it will show the StartMenuViewController.xib on the window at first, but I do not know how to change the view after clicking the button(FIND USB DRIVE). I want the current view changes to DetectingUSBViewController.xib.
Simplest way possible, assuming you have tied your USB button properly in, do the following :
- (IBAction)usbButton:(UIButton *)sender {
DetectingUSBViewController *second = [[DetectingUSBViewController alloc] initWithNibName:#"DetectingUSBView" bundle:nil];
[self presentViewController:second animated:YES completion:nil];
}
load the DetectingUSBViewController in startMenuViewController as DetectingUSBViewController* v1 = [[ViewCont1 alloc] initWithNibName:#"ViewCont1" bundle:nil]; now add or replace the view as [v1 view] in view where you want to add/replace.
You need to hook up your button to send an IBAction
You need a 'View for DetectingUSBViewController.xib'
=> one way (iOS like) is to use a ViewController. Subclass NSViewController and then alloc init a DetectingUSBViewController
Add the view. Don't present the VC (as there is no such thing in OSX)
//button click action
- (IBAction)usbButton:(UIButton *)sender {
//! Retain the VC
Self.detectingUSBViewController = [[DetectingUSBViewController alloc] initWithNibName:#"DetectingUSBView" bundle:nil];
//add the view
[_mainView addSubview:[_detectingUSBViewController view]];
}
I am working on my first Cocoa Mac OS X program and wondering the best approach to showing the windows.
I have my AppController / MainMenu.xib as the main launch window but have the MainMenu.xib window unchecked for Visible At Launch. I do this because on application load I am checking to see if they are logged in. If not I want to display the Login.xib window instead of the MainMenu.xib. Once logged in, I would open the MainMenu.xib window and close the LoginController I have this in the - (void)applicationDidFinishLaunching:(NSNotification *)aNotification method.
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
NSLog(#"app delegate");
[[NSUserDefaults standardUserDefaults] registerDefaults:[NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"Defaults" ofType:#"plist"]]];
BOOL didAuth = NO;
GTMOAuth2Authentication *auth = [GTMClasses authForService];
if (auth) {
didAuth = [GTMOAuth2WindowController authorizeFromKeychainForName:kKeychainName authentication:auth];
}
if (didAuth) {
[[DataClass sharedInstance] setIsSignedIn:YES];
NSLog(#"Already signed in %#", auth);
NSLog(#"Window: %#", self.window);
// SHOW MainMenu.xib here
} else {
NSLog(#"Not signed in %#", auth);
loginController = [[LoginController alloc] initWithWindowNibName:#"Login" owner:self];
[[loginController window] makeKeyAndOrderFront:self];
}
}
I see that AppController's awakeFromNib gets called before the applicationDidFinishLoadingWithOptions. Would it be best to put that code in my awakeFromNib?
If not, what is the best way to open the MainMenu.xib window from the AppDelegate?
If you have a better approach, what would it be?
PS: AppController is a subclass of NSObject so I don't have access to windowDidLoad or windowWillLoad
awakeFromNib is the first method to get executed.
You can also use alloc or init methods.
You can put your login authentication codes there, without any problem.
You must have seen the application life-cycle, how and when what methods get loaded.
I am learning how to create osx applications with Cocoa/Objective-C. I am writing a simple app which will link together two different tutorials I have been going through. On start up a choice window loads with 2 buttons, one button loads one window and the other loads the other window. When either button is clicked the choice window closes.
The choice window controller object was added to the MainMenu.xib file so it is created at launch. The window is then opened using the awakeFromNib message.
I want the result of one button to open up the 'track controller' tutorial application from the ADC website. The action looks like this:
- (IBAction)trackButton:(id)sender {
TMTrackController *trackController = [[TMTrackController alloc] init];
[self.window close];
}
I added an init method to the TMTrackController class which looks like this:
- (id) init {
if (self = [super init]) {
[self showWindow];
TMTrack *myTrack = [[TMTrack alloc] init];
myTrack.volume = 50;
self.track = myTrack;
[self updateUserInterface];
return self;
}
else {
return nil;
}
}
- (void) showWindow {
if(!self.window) {
[NSBundle loadNibNamed:#"trackWindow" owner:self];
}
[self.window makeKeyAndOrderFront:self];
}
I am not sure this is the best way to be doing this as I know that the choiceController class will be released when it is closed thus getting rid of the TMTrackController class too. However even when I untick the 'release when closed' box of the ChoiceWindow.xib it breaks too.
What is the correct way to do this?
With xib s in the same project use:
#interface
#property (strong) NSWindowController *test;
#implementation
#synthesize test;
test = [[NSWindowController alloc] initWithWindowNibName:#"XIB NAME HERE"];
[test showWindow:self];
[home close];
It is not completely the same but this is my solution for such problems: Stackoverflow
Just ignore my statement in this answer regarding showing the window as a modal window. Everything else is still valid. This way you could have your personal window controller and it controls everything there is within the xib. This is a huge advantage for maintaining the project afterwards (and you keep to the application logic).
I have a button with IBAction, which shows another window:
-(IBAction)someButtonClick:(id)sender
{
anotherView = [[NSWindowController alloc] initWithWindowNibName:#"AnotherWindow"];
[anotherView showWindow:self];
}
I worry about memory management in here. I allocate an object in this IBAction and don't released it. But how can i do it? If i released this object after showing, window will closing immediately.
The view is stored in an instance variable and you have access to it anywhere in your class. Release it in the code that dismisses the view.
Since anotherView is an instance variable you can release it in your dealloc method. But then you still have a memory leak, since every time your button is clicked a new instance of the window controller is created, but only the last one can be freed. You really should use accessors for this. Here is my suggestion:
- (NSWindowController *) anotherView;
{
if (nil == anotherView) {
anotherView = [[NSWindowController alloc] initWithWindowNibName:#"AnotherWindow"];
}
return anotherView;
}
- (void) setAnotherView: (NSWindowController *) newAnotherView;
{
if (newAnotherView != anotherView) {
[anotherView release];
anotherView = [newAnotherView retain];
}
}
- (void) dealloc;
{
[self setAnotherView: nil];
[super dealloc];
}
- (IBAction) someButtonClick: (id) sender;
{
[[self anotherView] showWindow: self];
}
If you use a Objective-C 2.0 property you don't have to write the setter.
And also you should rename your instance variable, the name should reflect what it is. And a View is not a Window Controller.
I am making a new window open and would like to implement the method makeKeyAndOrderFront: for the window, i was wondering what code i would need to enter to do this.
Here is some of the code I've already got to open the window:
File 1 (The First Controller)
#import "PreferenceController.h"
#implementation PreferenceController
- (id)init
{
if (![super initWithWindowNibName:#"Preferences"])
return nil;
return self;
}
- (void)windowDidLoad
{
NSLog(#"Nib file is loaded");
}
File 2 (The Action Opening The Window)
#import "Prefernces_Delegate.h"
#import "PreferenceController.h"
#implementation Prefernces_Delegate
- (IBAction)showPreferencePanel:(id)sender
{
// Is preferenceController nil?
if (!preferenceController) {
preferenceController = [[PreferenceController alloc] init];
}
NSLog(#"showing %#", preferenceController);
[preferenceController showWindow:self];
}
The reason I am trying to do this is it has been suggested by a friend to solve a window opening problem.
You don't want to implement -makeKeyAndOrderFront:, you want to call it on your window in order to bring it to front and make it the key window. What does your showWindow: method do?
Somewhere after [preferenceController showWindow:self];:
[self.window makeKeyAndOrderFront:self];
or did you mean add a method to the controller?
// you should use a different method name, cause it's not the
// controller that is made key and ordered front.
- (void)makeKeyAndOrderFront:(id)IBAction {
[self.window makeKeyAndOrderFront:self];
}
Message makeKeyAndOrderFront is sent only after initiating the main event loop [NSApp run]. You may try to send the message from the main view by implementing the method viewWillDraw:
- (void)viewWillDraw
{
[window makeKeyAndOrderFront: nil];
}