Recent questions tagged objective

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objective c - Suppressing "'…' is deprecated" when using respondsToSelector

I'm supporting 10.4+ by picking the most-current API at runtime: if ([fileManager respondsToSelector:@selector( ... not a valid solution. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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390 views

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objective c - Is the project.xcworkspace file important?

I am doing command line xcodebuild using a shell script. My problem is if I open and close the xx.xcodeproj ... help me to understand that. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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397 views

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objective c - GCD and async NSURLConnection

I know that if I create an NSURLConnection (standard async one), it will call back on the same thread. Currently ... way I could be doing this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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393 views

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objective c - When to use CALayer on the Mac/iPhone?

I'm slightly confused when to use CALayer on the iPhone or Mac and when not to use it? CoreAnimation works just ... time to dig into this class? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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627 views

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objective c - How to create a NSString from a format string like @"xxx=%@, yyy=%@" and a NSArray of objects?

Is there any way to create a new NSString from a format string like @"xxx=%@, yyy=%@" and a NSArray of ... create a va_list from a NSArray... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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454 views

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objective c - Is it possible to suppress Xcode 4 static analyzer warnings?

The Xcode 4 static analyzer reports in my code some false positives. Is there any way to suppress them? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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450 views

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objective c - When to use a UIView vs. a UIViewController on the iPhone?

I have always sort of wondered when to use a UIView vs. a UIViewController on the iPhone. I understand that you ... wonder if that was correct. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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371 views

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objective c - Log Messages I didn't asked for in Xcode 4.5 with iOS 6.0

since I updated Xcode to Version 4.5 and started building for iOS 6 log messages like this keep appearing: ... And what is their origin ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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356 views

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objective c - declaring global variables in iPhone project

how can i declare a global NSArray and then use it across my app? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - How to downscale a UIImage in IOS by the Data size

I am looking to downscale a UIImage in iOS. I have seen other questions below and their approach on how to ... length, then return the image? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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448 views

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objective c - UITableViewCell's imageView fit to 40x40

I use the same big images in a tableView and detailView. Need to make imageView filled in 40x40 when an ... Cell Objects in Predefined Styles". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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440 views

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objective c - "First Responder" - Did I get that right?

Let me summarize this shortly: A "First Responder" in a nib file is an object, which represents the UI control ... has focus. Is that right? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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434 views

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objective c - What property should I use for a Dispatch Queue after ARC?

I maintain a dispatch queue as a property with my view controller. I create this queue once in my view ... dispatch queue, when using ARC? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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479 views

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objective c - How to delete all keychain items accessible to an app?

I have stray keychain items on iOS (probably written by old version of app) that I need to delete. Is there an easy way to achieve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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objective c - Block implicitly retains 'self'; explicitly mention 'self' to indicate this is intended behavior

Given the following: - (void) someMethod { dispatch_async(dispatch_get_main_queue(), ^{ myTimer = [NSTimer ... I do that. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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635 views

1 answer

objective c - Error '_BSMachError: port 1607; (os/kern) invalid capability (0x14) "Unable to insert COPY_SEND" in Cordova app on iOS 10

Everything works fine till I build my cordova application with Xcode 7.3.0 but it started crashing only on iOS 10 ... 10 iPhone 6 Please help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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349 views

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objective c - Singleton with ARC

My question is the following: I have a singleton type object (I'm using ARC) that has this code in the ... doesn't give this error???? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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469 views

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objective c - What's the difference between #import and @class, and when should I use one over the other?

I've been teaching myself Objective-C over the past month or so (I'm a Java head) and I've got my brain ... 've been using just #import so far. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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349 views

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objective c - Core Data nested managed object contexts and frequent deadlocks / freezes

I have a problem that is almost identical to the problem described by this person here, but it hasn't get answered: ... solve it? Is this a bug? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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412 views

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objective c - Correct bridging for ARC?

I have a category class for NSString. @implementation NSString (URLEncode) - (NSString *)URLEncodedString { ... encodedString autorelease]; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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303 views

1 answer

objective c - upload video to facebook using facebook sdk 3.1 on ios 6.0

One of my app is to upload video to facebook account. I checked on web, but found that most of ... updated solution? Welcome any comment See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

1 answer

objective c - Create csv file from array of data in iOS

I want to write data from sql file to csv file. I have collected all data from sql file in an ... dataUsingEncoding:NSUTF8StringEncoding]]; } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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571 views

1 answer

objective c - Connect to VPN programmatically in iOS 8

Since the release of iOS 8 beta, I found a Network Extension framework in its bundle which is going to let ... Any help will be appreciated :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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535 views

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objective c - Zbar SDK is not working in iOS6

I was using ZBar for scanning in iOS5 and it was working well. Now after updating to iOS6, its not working. It ... ) What is wrong in my side? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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481 views

1 answer

objective c - How to enable/disable ARC in an xcode project?

If a project has already been created with ARC disabled, how do I enable it and vice versa? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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421 views

1 answer

objective c - Grand Central Dispatch vs NSThreads?

I searched a variety of sources but don't really understand the difference between using NSThreads and GCD. I' ... , creating a GUI application. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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506 views

1 answer

objective c - AFNetworking 2.0 AFHTTPSessionManager: how to get status code and response JSON in failure block?

When switched to AFNetworking 2.0 the AFHTTPClient has been replaced by AFHTTPRequestOperationManager / ... Any suggestions? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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369 views

1 answer

objective c - iOS is it a static or a dynamic framework?

This might sound like a silly question but If you have a thirdParty.framework file, can you tell if it's ... look different if you look inside? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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