Hi, in my app I create at the beginning a tab bar controller with 6 view controllers. One of them is to login in the application, then i have a login/logout button (Facebook sdk). I would like to know if is possible to do the next: 1) OR when I click in the logout button (because at this moment I'm logging in) "To close the entire appl...
There are a couple of things about Objective-C that are confusing to me: Firstly, in the objective-c guide, it is very clear that each class needs to call the init method of its subclass. It's a little bit unclear about whether or not a class that inherits directly from NSObject needs to call its init method. Is this the case? And if...
I have a vertical NSSplitView containing on one of its sides a NSScrollView with a IKImageBrowserView inside. The IKImageBrowserView shows only one row of thumbnails and only has horizontal scroller (the resizing mask is equal to NSViewWidthSizable). I would like to bind the zoom level of the IKImageBrowserView to the height of any of ...
I have a launchd daemon that every so often uploads some data via a web service using NSOperationQueue. I need to be able to persist this data, both so that it can later be re-uploaded in the event of failure, even between sessions (in case of computer shut down, for example). This is not a high load application, it probably receives i...
I am trying to populate an OutlineView with the contents of a XML file. I'd like to create and manage the values inside a NSIndexPath while cocoa parses the document. NSIndexPath has methods to add and remove indexes, but I need to increment/decrement the values in each index: [0, 0] [0, 1] [0, 2] and so on... how can I do that? ...
I have a bunch of hex values stored as UInt32* 2009-08-25 17:09:25.597 Particle[1211:20b] 68000000 2009-08-25 17:09:25.598 Particle[1211:20b] A9000000 2009-08-25 17:09:25.598 Particle[1211:20b] 99000000 When I convert to int as is, they're insane values when they should be from 0-255, I think. I think I just need to extract the firs...
Does anyone know how I can get the latest coordinated of my annotation after I've dragged a map annotation from a callout of the annotation? How can I access that info? Any code samples would be appreciated. Thanks, Zap ...
Hoping someone can help me with this as I've done some scratching & searching I'm still overlooking something obvious... I've defined a simple enumerated data type: typedef enum { kLow = -1, kMid, kHigh } MyMode; And made an instance variable of this type in my ClassA: @interface ClassA : UIView { MyMode myMode; } @p...
Hi guys, How would I make a GUI program that displays your Ip address with a click of a button? Please, no difficult explanations, I just started Cocoa not long ago. Thanks, Kevin ...
Is there a way to track UIViewController transitions? As part of analytics, I would like to measure how long the user spends in each UIViewController without adding the code to all the controllers. ...
This little bit of syntax has been a bit of a confusion for me in Objective-C. When should I call self.myObject vs just calling myObject. It seems redundant however they are not interchangeable. Would someone please enlighten me? ...
Is it possible to tween a variable (let's say a float from 0.0 to 2.0 over a period of time) in objective-C? Something like what TweenMax would do in flash. I guess the class methods of UIView don't do that. Is it doable maybe with CoreAnimation? Or would someone have to use NSTimer? Thanks ...
i'm writing an application in objective-c (using cocoa). i have a PDF template, i need to substitute actual values into placeholders in PDF and then save the result into new PDF. how can i do it? which library should i use? ...
How to disable a button after entering a particular letter in a textfield? ...
math.h is not really a documentation. Is there something else that will describe these functions a but more in detail? ...
Would you say that Objective-C categories are an implementation of the visitor design pattern? ...
In my application I don't use the upper bar that displays Wi-Fi/Date/Time because it's a game. However I need to be able to let my user to pick his music, so I'm using a MPMediaPickerController. The problem is, that when I present my controller, the controller ends up leaving a 10 pixels ( aprox ) bar at the top of the screen, just in th...
If an application produces a lot of memory leaks, are they "just" an in-app problem or are they also in RAM after the termination of the application? So does the iPhone OS release the memory allocated for the sandboxed application? Thank you ...
I have an NSMutableArray as a member variable for a class. In the .h file: @interface bleh { NSMutableArray *list; } @property (readonly, assign) NSMutableArray *list; @end In the .m file: @implementation bleh @synthesize list; -(void)init; { list = [NSMutableArray arrayWithCapacity:30]; } @end Now, I'm not really an objecti...
I am cleaning up my code in a phonebook iPhone application and the Leaks tool in Instruments is reporting that I am leaking NSCFString objects. Here is the pattern that I am following: I have a Person class in my application that has nothing more than local NSString members and associated properties for first name, last name, etc. My ...