Recent questions tagged objective

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objective c - Error "No known class method for selector 'Hello:'" in custom-made framework

I am making a framework for a company and I have completed all the code. I'm now trying to package ... orientations return YES; } @end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - How to prevent EXC_BAD_ACCESS from crashing an app?

Is there a way to prevent an EXC_BAD_ACCESS from crashing an app, like with @try..@catch you can handle an ... debugging console on my app. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - UIColor colorWithRed:green:blue: always produces black

I have come across many instances when I try to make custom color through code and the result is quite different ... it is a general issue? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - Referencing a static NSString * const from another class

In class A I have this: static NSString * const kMyConstant = @"my constant string"; How can I reference this from class B? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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547 views

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objective c - Rounding NSDecimalNumber

I'm having the hardest time figuring out something that seems like it should be very simple. I need to accurately ... life of me what it is. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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420 views

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objective c - "-Weverything" yielding "Comparing floating point with == or != is unsafe"

I have a string that I convert to a double like this: double d = [string doubleValue]; The documentation for ... . How should this be resolved? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - NSNotificationCenter : list of observers?

Is it possible to get the list of observers (objects and selectors) for a given notification name? (NSNotificationCenter) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - NSProgressIndicator progress with For loops?

My application does a lot of work with a bunch of For loops. It calculates a massive amount of strings, and ... would I make it progress then? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - Debugging over-released objects, problem with NSZombie

EDIT: I have found the cause of this crash! bbum pointed out that buffer overflows are a very common cause ... Desktop/MyProject-trunk/main.m:14 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - iPhone:DatePicker dd/mm/yyyy

I am using a DatePicker with popups when a user click a textField. However, the Picker displays Month first, ... .view addSubview:toolBar]; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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517 views

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objective c - SFTP libraries for iPhone?

Are there any good SFTP libraries other than libssh2?? I'm especially looking for a library that is very ... base rather difficult! Thanks!! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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498 views

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objective c - Accessing IP Address with NSHost

I am trying to get the IP Address using NSHost. With the NSHost object I can use the addresses method to access ... :1]; return h ; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - What is the purpose of having both NSMutableString and NSString?

Why does Objective C provide both class NSString and subclass NSMutableString rather than just provide NSMutableString ... storage or something? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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453 views

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objective c - Will iOS awake my app when i receive silent push notification?(When app is not in running state)

Update Question : The requirement is; as soon as I receive silent notification, I want to run a web service and ... killed from app switcher).. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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408 views

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objective c - UINavigationController: Simplest Example

I'm trying to do very simple example of a UINavigationController. Here is my code: - (void) ... UINavigationController... or something. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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413 views

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objective c - how to remove all objects from Core Data

how can I remove all objects? I know I can remove one by [managedObjectContext deleteObject:objToDelete]; is it ... iterating all array? thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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395 views

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objective c - Inserting NSData into SQLite on the iPhone

So far I've managed to create this method for inserting into a SQLite database on the iPhone: - (void) ... type blob for this). Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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434 views

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objective c - How to add hyperlink in iPhone app?

In my iPhone app, I require to show the hyperlink to a website How can I add hyperlink for a website in ... am still stuck with this issue. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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520 views

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objective c - Properties in dealloc: release then set to nil? or simply release

I'm new to Objective-C (and stackoverflow) and I'm a little turned around about best practices with regards ... ' properties in dealloc? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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411 views

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objective c - How do you detect words that start with “@” or “#” within an NSString?

I'm building a Twitter iPhone app, and it needs to detect when you enter a hashtag or @-mention within a ... an NSString? Thanks for your help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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485 views

1 answer

objective c - Being apprised of when NSStatusItem is hidden

I have an app which uses an NSStatusItem. On small screens there's not much space in the status bar. When a ... "]; [statusItem setView:maView]; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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378 views

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objective c - In ios6, setting your pageViewController's gestureRecognizers delegate to a viewController causes a crash

This has only started happening with ios6, but if you start a new project using the page view controller ... wrong? Many Thanks Stewart. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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390 views

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objective c - Dynamically change an object's superclass

Is it possible to change an object's superclass at runtime? If so, how? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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309 views

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objective c - Using CoreImage to filter an image results in image rotation

Thanks for reading. I'm trying to use CoreImage in iOS 5 to alter the appearance of an image. The problem is ... . Hope someone can help. Rob. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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413 views

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objective c - Building a Server/Client application in Cocoa

I built a fairly simple program that watches a folder, manipulates files as they are added, and gives a simple ... client to connect to it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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662 views

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objective c - Is there any problem using self.property = nil in dealloc?

I know declared property generates accessor method which is someway just syntax sugar. I found quite a lot people ... :nil]; both work. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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411 views

1 answer

objective c - Is there a way to check if process is 64 bit or 32 bit?

I am trying to find process type (32 bit/ 64bit) from process pid? I get the process information and process list ... I am out of the process. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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445 views

1 answer

objective c - Convert any Data Type into NSData and back again

I'm working on an app where you can send either a text, image or a contact over Multipeer Connectivity to ... help would be much appreciated! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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