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OBJECTIVE-C QUESTIONS

Why am I allowed to write and use methods in an implementation that aren't declared in the header file in Objective-C?
Why am I allowed to write and use methods in an implementation that aren't declared in the header file in Objective-C?
hop of those help? The method declarations in the class interfaces are there for the compiler (to suppress warnings), since method lookup in Objective-C is done at runtime, and not compile time.
TAG : objective-c
Date : November 27 2020, 07:01 PM , By : user3863761
Reading Alias files
Reading Alias files
like below fixes the issue Check out BDAlias. This is a nice Cocoa wrapper around Alias.http://github.com/rentzsch/bdalias
TAG : objective-c
Date : November 26 2020, 07:01 PM , By : Harry Nguyen
NSMutableArray accessing issue
NSMutableArray accessing issue
may help you . since you never allocate, retain, copy, etc. button you should not be releasing itjust get rid of the [button release]s
TAG : objective-c
Date : November 26 2020, 07:01 PM , By : user3863444
NSString (hex) to bytes
NSString (hex) to bytes
wish help you to fix your issue Fastest NSString category implementation that I could think of (cocktail of some examples):
TAG : objective-c
Date : November 26 2020, 07:01 PM , By : Eli Zarka
How to order a window to front if you are not in the Application in Objective-C
How to order a window to front if you are not in the Application in Objective-C
will be helpful for those in need As you've discovered, changing the window order within your application does not have any impact on which application is active. You can bring your application to the foreground by activating it:
TAG : objective-c
Date : November 24 2020, 07:00 PM , By : cnfuzd821
What is the use of extern in declaring constants?
What is the use of extern in declaring constants?
hop of those help? The extern keywords forces the compiler to treat the statement as a declaration rather than a definition. In other words, extern prevents the compiler from reserving space for the variable. Thus, only the compilation unit which doe
TAG : objective-c
Date : November 24 2020, 07:00 PM , By : recchiap
Why is Objective-C not very popular outside of the Apple community?
Why is Objective-C not very popular outside of the Apple community?
this one helps. Another way of thinking about this question might be: why did C++, rather than Objective-C, become the "Object-Oriented C"?I learned C++ in 1991, and remember that C++ seemed like the hot thing while Objective-C was this weird little
TAG : objective-c
Date : November 23 2020, 07:00 PM , By : Tonna Cherree
Can I assign array size using NSMutableArray?
Can I assign array size using NSMutableArray?
I think the issue was by ths following , The capacity field is seldom useful. The array will be expanded on demand anyway.
TAG : objective-c
Date : November 23 2020, 07:00 PM , By : jdiodato
incorrect variable value outside main()
incorrect variable value outside main()
around this issue You're shadowing a global variable with a local one. If the intent is to use the global testString, you shouldn't re-declare it with "NSString*".
TAG : objective-c
Date : November 22 2020, 07:01 PM , By : dvelasquez
How to concatenate two float values in Objective-C?
How to concatenate two float values in Objective-C?
may help you . If you want a string with the string representation of two floats concatenated, try:
TAG : objective-c
Date : November 22 2020, 07:01 PM , By : user3862055
return nil for dateFromString call of NSDateFormatter
return nil for dateFromString call of NSDateFormatter
may help you . I am getting nil returned for the date variable in the below code. I can't find any problem with the date format, can anyone help? , Try
TAG : objective-c
Date : November 22 2020, 07:01 PM , By : Marcelo J. Garcia
How to compare string with float? in Objective C
How to compare string with float? in Objective C
Does that help The == operator only makes sense when the two types are compatible, which is not the case between strings and floats. One side must be explicitly converted to the other.You may convert the NSString into a float:
TAG : objective-c
Date : November 20 2020, 07:00 PM , By : user3861663
How to use Calibri font?
How to use Calibri font?
I wish this helpful for you You want to use custom font in your application so first you can add the font in your project bundle then store font in to plist like this way..
TAG : objective-c
Date : November 20 2020, 07:00 PM , By : alli240
CoreData many-to-many relationship NSPredicate Exceptions
CoreData many-to-many relationship NSPredicate Exceptions
Hope this helps First, seeing your data model would be helpful but I am guessing you are doing something like:
TAG : objective-c
Date : November 20 2020, 07:00 PM , By : Mathew
Objective-C Framework PSMTabBarControl does not work - NSTabView Tabs with Style
Objective-C Framework PSMTabBarControl does not work - NSTabView Tabs with Style
it helps some times I've ported a version of it and updated it all to work with IB 3.0+.http://codaset.com/robertjpayne/psmtabbarcontrol/
TAG : objective-c
Date : November 18 2020, 07:00 PM , By : user3860806
How to use Doxygen with Xcode?
How to use Doxygen with Xcode?
With these it helps The parser is telling you XML is not well formed, but that error usually shows because nothing has been generated BEFORE running docsetutil. First thing should be to go over the many lines of console output and look for warnings,
TAG : objective-c
Date : November 18 2020, 07:00 PM , By : Christopher Jackson
Creating Custom Twitter Application
Creating Custom Twitter Application
With these it helps Best place to start is here: http://apiwiki.twitter.com/
TAG : objective-c
Date : November 17 2020, 07:01 PM , By : Alexandre
Fastest way to iterate through an NSArray with objects and keys
Fastest way to iterate through an NSArray with objects and keys
wish of those help The fastest way to iterate over an NSArray would be to use fast enumeration. I your case this would be:
TAG : objective-c
Date : November 17 2020, 07:01 PM , By : user3860490
How can I compare two dates, return a number of days
How can I compare two dates, return a number of days
will help you From Apple's example, basically use an NSCalendar:
TAG : objective-c
Date : November 16 2020, 07:01 PM , By : user3860388
Extract values between parenthesis from NSString
Extract values between parenthesis from NSString
hop of those help? Just to be complete:If you are absolutely sure of the format of your output you can use the array methods:
TAG : objective-c
Date : November 14 2020, 07:01 PM , By : user3859741
How do browsers know there is an RSS feed present for a given URL
How do browsers know there is an RSS feed present for a given URL
Does that help Web pages that have an associated feed will have an alternate link with one of the feed MIME types:
TAG : objective-c
Date : November 14 2020, 07:01 PM , By : Saikiran
How to add info button to UIToolbar
How to add info button to UIToolbar
wish helps you You need to create a UIButton of type UIButtonTypeInfoLight (or, depending on your toolbar color UIButtonTypeInfoDark). You'd then use this button as the custom view for a UIBarButtonItem:
TAG : objective-c
Date : November 14 2020, 07:01 PM , By : user3859578
Cocoa: getting a Table View cell to send action messages
Cocoa: getting a Table View cell to send action messages
To fix the issue you can do AFAIK, the cells in an NSTableView won't send action messages out to your application, they're sent to the NSTableView so it can update its data. NSTableView itself tries to be pretty clever and update your data directly,
TAG : objective-c
Date : November 14 2020, 07:01 PM , By : Lex
releasing arrays objective-c
releasing arrays objective-c
around this issue release only applies to Objective-C objects. A C style array (like you have there) is just some stack memory. In your case, it looks like you're using it to store 3x3=9 Objective-C objects in it. If you want to release them all, you
TAG : objective-c
Date : November 13 2020, 07:01 PM , By : user3859280
UIScrollView with pages enabled and device rotation/orientation changes (MADNESS)
UIScrollView with pages enabled and device rotation/orientation changes (MADNESS)
it fixes the issue Is it necessary to have a separate UIViewController (PageViewController) for every page in your UIScrollView? Why not let your MainViewController take care of this.Resizing your views (and your UI in general) after rotating the dev
TAG : objective-c
Date : November 13 2020, 07:01 PM , By : Gopabandhu Sahoo
"incomplete universal character name" with stringWithUTF8String
"incomplete universal character name" with stringWithUTF8String
seems to work fine \U and \u are not the same thing. The \U escape expects 8 (hex) digits instead of 4.This should work:
TAG : objective-c
Date : November 12 2020, 07:00 PM , By : user3859121
What is the main difference between framework and dynamic library
What is the main difference between framework and dynamic library
I wish this helpful for you At its heart, an OS X framework is a dynamically linked library. The Framework is a special directory structure called a "framework bundle" that contains one or more versions of the dynamically linked library, as well as d
TAG : objective-c
Date : November 12 2020, 07:00 PM , By : Fising
How to make a blue button with white text?
How to make a blue button with white text?
I hope this helps . It sounds like your button is of the UIButtonTypeRoundedRect type. The link below should answer your question.Is it even possible to change a UIButtons background color?
TAG : objective-c
Date : November 09 2020, 07:01 PM , By : Skippy
Memory leak in NSMutableArray allocation
Memory leak in NSMutableArray allocation
wish of those help It is standard procedure that objects returned from methods (in your case, contactsArray) are autoreleased before returning. You could either return [contactsArray autorelease]; or create it already autoreleased with [NSMutableArra
TAG : objective-c
Date : November 09 2020, 07:01 PM , By : sigmasquared
NSCFString leak inVolving NSString
NSCFString leak inVolving NSString
hope this fix your issue That means that the object allocated at that point is leaked. In this case, most likely because you over-retained it somewhere and failed to release it.You need to carefully examine the lifespan of that particular string and
TAG : objective-c
Date : November 08 2020, 07:01 PM , By : abhivc
NSCFArray leak in the NSMutablearray allocation
NSCFArray leak in the NSMutablearray allocation
With these it helps Your code will allocate a new instance of filteredListContent every time reloadTable is called, which will usually happen several times during the lifetime of your application. This causes a leak because the old instances are not
TAG : objective-c
Date : November 08 2020, 07:01 PM , By : Jully
How to use NSURLDownload
How to use NSURLDownload
I think the issue was by ths following , NSURLDownload not on iPhone see the note:
TAG : objective-c
Date : November 08 2020, 07:01 PM , By : avi zukrel
How to enlarge dynamically an UILabel (label and font size)?
How to enlarge dynamically an UILabel (label and font size)?
With these it helps All you need to do is apply an affine transform to the UILabel object.
TAG : objective-c
Date : November 08 2020, 07:01 PM , By : marcosamson
App crashes after a few seconds
App crashes after a few seconds
should help you out You haven't implemented your -timerFinished method declared in the header. In addition to declaring it in the header file, you need to provide the implementation of it, even if it's empty.Your app is crashing because the timer fir
TAG : objective-c
Date : November 08 2020, 07:01 PM , By : user3857681
Undocumented Mac Calls
Undocumented Mac Calls
Does that help It's not altogether unheard-of, but if you're going to use them in release software, you need to make absolutely sure you have your shit together and test every version of OS X extensively before it comes out — because yes, Apple could
TAG : objective-c
Date : November 08 2020, 07:01 PM , By : Average Joey
How do I release an object allocated in a different AutoReleasePool?
How do I release an object allocated in a different AutoReleasePool?
seems to work fine First get a general understanding of the objective c memory management. You are confusing a lot of different things here. For example you don't have to retain the m_object since alloc already sets up the retain count with 1. Also n
TAG : objective-c
Date : November 07 2020, 07:01 PM , By : JyoZ
How to edit Selection indicator in UIPicker?
How to edit Selection indicator in UIPicker?
Any of those help This is not a feature of UIPickerView in the disclosed API. The screenshot you show is either drawing the "hrs", "min", "sec" labels itself or is using an undisclosed API (possibly overriding the _UIPickerViewSelectionBar).It would
TAG : objective-c
Date : November 07 2020, 07:01 PM , By : developer
AVPlayerViewController - How to display always playback controls
AVPlayerViewController - How to display always playback controls
I wish this help you That's not possible. There is not any Public API of AVPlayerViewController to keep playback controls visible all time. You must have to make your own custom playback controls for this i.e. play button, seekbar, duration label etc
TAG : objective-c
Date : November 06 2020, 07:00 PM , By : Aiman Akit
How can I make the Tab key move focus out of a NSTextView?
How can I make the Tab key move focus out of a NSTextView?
wish help you to fix your issue You could implement -textView:doCommandBySelector: in your text view's delegate:
TAG : objective-c
Date : November 06 2020, 07:00 PM , By : user299928
How do I add Applescript support to my Cocoa application?
How do I add Applescript support to my Cocoa application?
may help you . If you want to send AppleScript from your application and need a sandboxed app, you need to create a temporary entitlement
TAG : objective-c
Date : November 05 2020, 07:01 PM , By : user3856847
Is there a Javadoc-like plugin for Xcode that automatically generates the doc template?
Is there a Javadoc-like plugin for Xcode that automatically generates the doc template?
hop of those help? The script here http://www.duckrowing.com/2011/05/14/using-the-doxygen-helper-in-xcode-4/ does exactly what you want.EDIT: Here is an updated version of the Script: https://github.com/premosystems/DoxygenXCodeHelper
TAG : objective-c
Date : November 05 2020, 07:01 PM , By : user3856633
UIKeyBoard resize on orientation change to landscape
UIKeyBoard resize on orientation change to landscape
around this issue I have this problem too, all I can think of is dismissing the keyboard and reshowing it (resign and then become first responder again). But that seems very unsatisfactory.Note also you should be converting the rect from screen coord
TAG : objective-c
Date : November 04 2020, 07:01 PM , By : root
wait for CLLocationManager to finish before tweeting
wait for CLLocationManager to finish before tweeting
To fix the issue you can do You could register listeners in your class that implements the CLLocationManagerDelegate. For example,
TAG : objective-c
Date : November 04 2020, 07:01 PM , By : Lee Johnson
Difference between char *foo vs (char *)foo in Objective-C
Difference between char *foo vs (char *)foo in Objective-C
this one helps. There are two places your first expression can appear. The first is as a variable definition. By itself, char *foo is defining a variable - a pointer to char named foo. In the context of a function definition it defines the type of on
TAG : objective-c
Date : November 04 2020, 07:01 PM , By : ahmet talha
Objective C / iPhone: How to add a timer to let the text update?
Objective C / iPhone: How to add a timer to let the text update?
it helps some times I want to write an application that allow user to count down the time. The time will be displayed using label. I want to update the label every second, how can I do it? or which API is suitable for me to do this? thz in advance.
TAG : objective-c
Date : November 04 2020, 07:01 PM , By : KaoticShadow
how to keep the UIActivityIndicator "floating" above the UITable?
how to keep the UIActivityIndicator "floating" above the UITable?
Any of those help It all depends where you are placing the UIActivityIndicator. You need to give more detail or show some code. I assume you are putting the activity indicator in a UITableViewCell and then the activity indicator moves with the cell.I
TAG : objective-c
Date : November 04 2020, 07:01 PM , By : user3856341
How to remove subviews to release more memory
How to remove subviews to release more memory
it fixes the issue use clear cache concept for this. for more https://github.com/thest1/LazyList.
TAG : objective-c
Date : November 04 2020, 07:01 PM , By : Volodej
Deallocating NSMutableArray of custom objects
Deallocating NSMutableArray of custom objects
Hope that helps I don't think you understand how memory management in Cocoa works. The array will retain the objects you add to it, and it will release them by itself when the array no longer needs them (such as when you release the array).In other w
TAG : objective-c
Date : November 03 2020, 07:01 PM , By : user3856001
Get TopLeft and BottomRight from MKCoordinateRegion MKMapView
Get TopLeft and BottomRight from MKCoordinateRegion MKMapView
Hope that helps I checked the properties in documentation for MKCoordinateRegion, MKCoordinateSpan and MKMapView to see there is a way to get the TopLeft and BottomRight Lat Long from the map view and I didn't find any. I know that the span gives me
TAG : objective-c
Date : November 03 2020, 07:01 PM , By : Stef Ka
How to use Obj-C classes in MacRuby
How to use Obj-C classes in MacRuby
will be helpful for those in need You can access the class directly using ClassName.new.If you have a class named Utilities in your project and it has a method named greeting:, you would call it like so.
TAG : objective-c
Date : November 02 2020, 07:01 PM , By : user3855814
cocoa hello world screensaver
cocoa hello world screensaver
I wish this help you I have been studying NSView and as such I thought I would give a shot at a screen saver. I have been able to display and image in an NSView but I can't seen to modify this example code to display a simple picture in ScreenSaverVi
TAG : objective-c
Date : November 02 2020, 07:01 PM , By : user3855759
how do i know when to use a datasource or delegate protocol when using a UI object in my project?
how do i know when to use a datasource or delegate protocol when using a UI object in my project?
like below fixes the issue In general that is explained in the documentation of the individual object. For example http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIPickerView_Class/Reference/UIPickerView.htmlIn the Overview s
TAG : objective-c
Date : November 02 2020, 07:01 PM , By : Jennifer
Building Dynamic Classes in Objective C
Building Dynamic Classes in Objective C
Does that help The reason that [[A alloc] init]; blows up is that the compiler has no clue what A means. The compiler never knows that A is even there.Edit: Also, it looks like what you want is:
TAG : objective-c
Date : October 31 2020, 08:00 PM , By : user3855202
Embed font in a mac bundle
Embed font in a mac bundle
help you fix your problem Yes, you can. You should add a Copy Files build phase to your target (right-click your target, then choose Add > New Build Phase > New Copy Files Build Phase).Set the destination of the Copy Files build phase to Resources wi
TAG : objective-c
Date : October 31 2020, 08:00 PM , By : user3855056
NSString sizeWithAttributes: Inaccuracy
NSString sizeWithAttributes: Inaccuracy
it should still fix some issue I believe what you are noticing is the difference between the frame of the control and it's layout frame. See Frame vs Layout Frame for a good explanation.You are doing the right thing in computing the width. For a Labe
TAG : objective-c
Date : October 30 2020, 08:01 PM , By : Tim
Attributed strings in UITableViewCells without WebView?
Attributed strings in UITableViewCells without WebView?
I wish this help you NSAttributedString has valid use only since 3.2.But you may use TTStyledTextLabel from three20.
TAG : objective-c
Date : October 30 2020, 08:01 PM , By : Schmavies
Printing an invisible NSView
Printing an invisible NSView
Any of those help You don't have to create the view in advance, you can create it when needed.If you have Document Based application and a view that you want to dump to printer, then in our MyDocument (or whatever you call it) that extends NSDocument
TAG : objective-c
Date : October 30 2020, 08:01 PM , By : user3854695
target-action uicontrolevents
target-action uicontrolevents
around this issue I encountered the same problem, and came up with a solution. It's not amazingly pretty, but it works quite well. It is a UIControl category that stores the last UIControlEvent fired to its own tag property. You can get it from the l
TAG : objective-c
Date : October 30 2020, 08:01 PM , By : longbowrocks
setSelectsInsertedObjects on NSArrayController not actually selecting
setSelectsInsertedObjects on NSArrayController not actually selecting
fixed the issue. Will look into that further How are you binding them? If it is through NSArrayController's 'content' binding, then I believe it tries to bind the selectionIndexes to the same object. This class (NSIndexSet) does not work with NSUserD
TAG : objective-c
Date : October 30 2020, 08:01 PM , By : user3854668
Objective-C function with default parameters?
Objective-C function with default parameters?
will help you There's no default parameters in ObjC.You can create 2 methods though:
TAG : objective-c
Date : October 29 2020, 08:01 PM , By : Gary Bosworth

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