Ok, i am totally stuck and was wondering is anyone could point out what must be the obvious mistake i am making.
I am using Simperium (dev branch) in a project, and want to get a notification in my main AppDelegate if the user dismisses the authentication window.
Now in the SPAutheticationManager.m file is the following code:
- (void)cancel {
DDLogVerbose(#"Simperium authentication cancelled");
if ([delegate respondsToSelector:#selector(authenticationDidCancel)])
[delegate authenticationDidCancel];
}
I have set a breakpoint and this is definitely being called when the window is dismissed.
Now, i have added SPAuthenticationDelegate to my implementation in my AppDelegate, and then added the following code to AppDelegate.m
-(void)authenticationDidCancel {
NSLog(#"Authetication Cancelled");
}
But, this isn't getting called, and i can't work out why???
Anyone have any idea what i'm missing here?
Thanks
Gareth
In case anyone else hits this, there is no way to do this without implementing a custom delegate method in simperium.h and making your AppDelegate.h a delegate of it.
In simperium.h
- (void)didCancelAuth;
Then in simperium.m authenticationDidCancel method add:
if ([delegate respondsToSelector:#selector(didCancelAuth)]) {
[delegate didCancelAuth];
}
Then set your appDelegate as simperium's delegate and add:
- (void)didCancelAuth
{
//auth has been cancelled
}
you also need to make sure your appdelegate is a delegate by doing something like
self.simperium.delegate = self;
Cheers
Gareth
Just wanted to let you know that we've just added a brand new 'login cancelled' delegate method (Commit here: https://github.com/Simperium/simperium-ios/commit/5cae8a157786a48ffe1cc649f898341eb9cf51bf in develop branch).
Thanks for helping us improve Simperium!
Related
[Edit] as Willeke helpfully points out it's menuDidClose: NOT menuWillClose:. My code actually had that part right. Correcting the post in case someone else finds this researching a similar problem.
I'm sure this is just a Cocoa newbie problem but I've wracked my brain on it for hours. I've read the NSMenu and NSMenuDelegate docs a few times trying to figure out what I'm missing but it looks straight forward.
I have a window controller for a preferences window with a toolbar and three views. The window controller is declared as NSMenuDelegate.
#interface PrefsController : NSWindowController <NSMenuDelegate, NSWindowDelegate, NSOpenSavePanelDelegate>
This issue is a NSPopUpButton on the first view. The menu associated with popupbutton works fine. I can modify, etc. the menu via the associated IBOutlet variable. It's bound to Shared User Defaults Controller for selected value and that works fine.
But the menuWillOpen: and menuDidClose: methods are not invoked when the menu is accessed.
- (void)menuWillOpen:(NSMenu *)menu {
if (menu == myPopupButton.menu) {
[self updateMenuImages:NSMakeSize(32, 32)];
}
}
- (void)menuDidClose:(NSMenu *)menu {
if (menu == myPopupButton.menu) {
[self updateMenuImages:NSMakeSize(16, 16)];
}
}
My apologies for what is almost certainly a dumb mistake on my part, but I'm stumped.
Menu delegates are not used that often, so Apple hasn't made them too easy to set up in Interface Builder. Instead, do this in awakeFromNib:
myPopupButton.menu.delegate = self;
I am new to osx developing I have read on documentations about windowDidResized:
method , but I am failing to get its delegate .
It is never get called for me , I have included appKit/appKit.h as it said in docs
but the delegate method never triggers
(I am trying to get it inside my NSViewController)
can some one please make a simple example how do i get that delegate please?
what I have tried to do is:
-(void)loadView
{
//blabla
self.view.window.delegate = [self.view.window delegate];
//blabla ..
}
- (void)windowDidResize:(NSNotification *)notification
{
NSLog(#"window Resized");
}
I am expecting non xib usage samples please :)
thanks a lot in advance.
A view probably shouldn't be a window's delegate.
Normally the delegate for a window would be a controller object in the Model View Controller paradigm.
You can however use NSNotificationCenter to add an object as an observer for a specific NSNotification from a specific object.
( be sure to remove the observer in its dealloc method if not earlier )
NSWindow class sends many different notifications.
I simply updated to iOS 7.1 and I get an unrecognized selection error for a function called "_layoutCells".
I have a simple subclass of UITabBarController.
Note that this is a hack to avoid a bad crash until a better solution or explanation is found. I though I should share it.
Simply add the following method to your UITabBarController subclass implementation:
- (void) _layoutCells
{
// HACK ALERT: on iOS 7.1, this method will be called from deep within the bowels of iOS. The problem is that
// the method is not implemented and it results in an unrecognized selected crash. So we implement it...
//
// What could go wrong?
}
Thanks to GenesisST for giving his answer, but I know methods are called for a reason. And usually layoutCells will call layout for all subviews. While I rather wait for an answer from Apple, I like other people need to submit my app within a given timeline.
In my case, I was getting this error due to some hacks. I had replaced the UIMoreNavigationController delegate, which is an undocumented class by Apple, so I could expect errors. I am doing this hack to extend the More tab's functionality, and this error only occurs when I change the moreNavigationController tableView's delegate.
So I store their delegate, change it, then call _layoutCells to their delegate when iOS calls it on my class.
- (void)_layoutCells
{
if([self.moreTableViewDelegate respondsToSelector:#selector(_layoutCells)]){
[self.moreTableViewDelegate performSelector:#selector(_layoutCells)];
}
}
I don't know if this apply's to anyone here, but just in case someone else comes to SO with my edge case.
I've had the same issue in my app where I have provided custom delegate/datasource to the more tableview controller. I haven't figured out why, but it seems that _layoutCells method is invoked on the more tableview controller.
I fixed it, adding this method:
-(NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
{
// self.viewController is my tabBarController
UINavigationController* moreNavigationController = self.viewController.moreNavigationController;
// Retrieve the more list controller (it is the first in the hierarchy)
id moreListController = moreNavigationController.viewControllers.firstObject;
Class moreTableViewClass = [moreListController class];
if (moreTableViewClass) {
return [moreTableViewClass instanceMethodSignatureForSelector:aSelector];
}
return nil;
}
I've done various test and it seems a reliable workaround. But if you'll find better solution... share it!
I'm a little bit new to Objective-c with xCode, and I would like to know something. Is there a way to terminate an application when the red circle in the left of the window is clicked? Like on the calculator.
Yes you can do with Mac OSX applications.
You need to implement this method in your AppDelegate class
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender{
return YES;
}
If you want terminate the app when closing the window. Please implement the following appdelegate method.
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender
{
return YES;
}
If you want do not terminate your app, just set the return "NO".
I hope that your problem will be resolved with this solution.
I am having some problems implementing QuickLook functionality from a table in an NSView. The limited documentation on QuickLook really doesn't help at all.
After reading through the Apple Docs (which are geared heavily towards custom generators and plugins), I ended up looking at the QuickLookDownloader sample code. This code is based upon a document-based application, but appears to be the right method for me (after all it is Apple's code and it does work in their project).
In my implementation I can get the QuickLook panel to show up just fine, and I can dismiss it just as easy. However, the panel itself never calls the delegate methods from within my NSViewController. As a result I never even get to displaying objects, just the wording "No items selected". And I am stumped.
I tried calling a setDelegate, but get warned about impending doom if I continue down that route...
[QL] QLError(): -[QLPreviewPanel setDelegate:] called while the panel has no controller - Fix this or this will raise soon.
See comments in QLPreviewPanel.h for -acceptsPreviewPanelControl:/-beginPreviewPanelControl:/-endPreviewPanelControl:.
And then doom happens anyway with a dealloc when trying to respond to one of the delegate methods.
And yes I did read the header which confirms that I should be setting the delegate after I won the panel (see code below).
So here's my code, which pretty much matches the sample code with the exception of a) where I get my data from (I get it from an NSArrayController) and the b) where I get my preview item from (mine comes directly from my model object - or should anyway)
#interface MyViewController : NSViewController
<QLPreviewPanelDataSource, QLPreviewPanelDelegate> {
QLPreviewPanel * previewPanel;
NSArrayController * myArrayController;
NSTableView * myTable;
// [...] Other instance vars
}
#implementation MyViewController
// [...] all the other methods, init, dealloc etc...
-(IBAction)togglePreviewPanel:(id)previewPanel {
if ([QLPreviewPanel sharedPreviewPanelExists] &&
[[QLPreviewPanel sharedPreviewPanel] isVisible])
{
[[QLPreviewPanel sharedPreviewPanel] orderOut:nil];
}
else
{
[[QLPreviewPanel sharedPreviewPanel] makeKeyAndOrderFront:nil];
}
}
-(BOOL)acceptsPreviewPanelControl:(QLPreviewPanel *)panel
{
return YES;
}
// This document is now responsible of the preview panel.
// It is allowed to set the delegate, data source and refresh panel.
-(void)beginPreviewPanelControl:(QLPreviewPanel *)panel
{
if (DEBUG) NSLog(#"QuickLook panel control did BEGIN");
previewPanel = [panel retain];
panel.delegate = self;
panel.dataSource = self;
}
// This document loses its responsisibility on the preview panel.
// Until the next call to -beginPreviewPanelControl: it must not change
// the panel's delegate, data source or refresh it.
-(void)endPreviewPanelControl:(QLPreviewPanel *)panel
{
[previewPanel release];
previewPanel = nil;
if (DEBUG) NSLog(#"QuickLook panel control did END");
}
// Quick Look panel data source
-(NSInteger)numberOfPreviewItemsInPreviewPanel:(QLPreviewPanel *)panel
{
if (DEBUG) NSLog(#"QuickLook preview count called");
return [[myArrayController selectedObjects] count];
}
-(id <QLPreviewItem>)previewPanel:(QLPreviewPanel *)panel
previewItemAtIndex:(NSInteger)index
{
if (DEBUG) NSLog(#"QuickLook preview selection of item called");
return [[displayAC selectedObjects] objectAtIndex:index];
}
-(BOOL)previewPanel:(QLPreviewPanel *)panel handleEvent:(NSEvent *)event {
if (DEBUG) NSLog(#"QuickLook panel error handler called");
// redirect all key down events to the table view
if ([event type] == NSKeyDown) {
[myTable keyDown:event];
return YES;
}
return NO;
}
The issue seems to be that the acceptsPreviewPanelControl never gets called, so the delegates never get used (they definitely never get called).
I'm sure this is a simple step that I'm missing, but after dissecting the sample code and scouring over the docs I don't see the answer.
Is it because this is all from within an NSViewController (although I see no reason why that should even come into the equation)?
Any and all help much appreciated.
SOLUTION UPDATE
Thanks to Peter's observation, the fix was a quick one. Don't you hate it when the error message in the debugger means what it says? :-)
In my class that loaded MyViewController I simply needed to add three lines of code to fix the problem.
// mainWindow is an IBOutlet to my window because the calling class
// is a simple object and not an NSWindowController otherwise I could
// have used `self` instead of `mainWindow`
NSResponder * aNextResponder = [mainWindow nextResponder];
[mainWindow setNextResponder:myViewControllerInstance];
[myViewControllerInstance setNextResponder:aNextResponder];
Job done :-) Thanks Peter.
Why would you expect it to send you delegate messages if you aren't (yet) its delegate? If you want it to send you delegate messages, then you need to set yourself as its delegate.
I tried calling a setDelegate, but get warned about impending doom if I continue down that route...
[QL] QLError(): -[QLPreviewPanel setDelegate:] called while the panel has no controller - Fix this or this will raise soon. See comments in QLPreviewPanel.h for -acceptsPreviewPanelControl:/-beginPreviewPanelControl:/-endPreviewPanelControl:.
“No controller”, it says. So, you need it to have a controller.
The comments on that header, particularly on acceptsPreviewPanelControl: and the QLPreviewPanel instance method updateController, suggest that the panel's controller, when it has one, is an object that is in the responder chain. Therefore, if your controller is not becoming the panel's controller, it's because your controller isn't in the responder chain.
So, fix that, and then it'll work.
I would imagine that your view controller should be in the responder chain whenever its view or any subview thereof is in the responder chain, but maybe this isn't the case. The documentation doesn't say. If all else fails, set yourself as some view's next responder explicitly (and its previous next responder as your next responder), then send the preview panel an updateController message.
After so many years, in the swift world, I found this line of code works as well.
Without rearrange the default response chain, just "push" your view controller to be the first responder in the window. I'm not sure if it works for every scenario:
view.window?.makeFirstResponder(self)
And the object setups are the same:
override func acceptsPreviewPanelControl(_ panel: QLPreviewPanel!) -> Bool {
return true
}
override func beginPreviewPanelControl(_ panel: QLPreviewPanel!) {
panel.dataSource = self
panel.delegate = self
panel.currentPreviewItemIndex = //your initial index
}
override func endPreviewPanelControl(_ panel: QLPreviewPanel!) {
panel.dataSource = nil
panel.delegate = nil
}