Recent questions tagged objective

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objective c - NSURLConnection sendAsynchronousRequest:queue:completionHandler: making multiple requests in a row?

I have been using NSURLConnection's sendAsynchronousRequest:queue:completionHandler: method which is great. But, I ... great asychronous method? 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 - iPhone proper usage of Application Delegate

I'm looking to be able to reference certain state/objects through anywhere in my application. For instance, a user ... the pros handle this one. 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 prevent UINavigationBar from covering top of view in iOS 7?

After updating to Xcode 5, the navigation bars in all of my app's views have shifted down. Here are ... transparency of the navigation bar. 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 - Cocoa Core Data efficient way to count entities

I read much about Core Data.. but what is an efficient way to make a count over an Entity-Type (like SQL can do ... this is not the best way... 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 - Access Container View Controller from Parent iOS

in iOS6 I noticed the new Container View but am not quite sure how to access it's controller from the containing view ... them, can I use 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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543 views

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objective c - Set a custom subclass of UINavigationBar in UINavigationController programmatically

Does anyone know how can I use my custom subclass of UINavigationBar if I instantiate UINavigationController ... done also programmatically. 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 - ARC - The meaning of __unsafe_unretained?

Just want to make sure that I got it right: Do I need to __unsafe_unretain objects that I don't own? If an ... thing or was it in use before? 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 - Where to store global constants in an iOS application?

Most of the models in my iOS app query a web server. I would like to have a configuration file storing the base ... in Objective-C to do so? 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 - Best practice using NSLocalizedString

I'm (like all others) using NSLocalizedStringto localize my app. Unfortunately, there are several "drawbacks" ... that encapsulates it? 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 - What makes a keychain item unique (in iOS)?

My question concerns keychains in iOS (iPhone, iPad, ...). I think (but am not sure) that ... its kSecClass is not kSecClassGenericPassword? See Question&Answers more detail:os...

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

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396 views

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objective c - Why has NSNumber such strange retainCounts?

NSNumber* n = [[NSNumber alloc] initWithInt:100]; NSNumber* n1 = n; In the code above, why is the value of n's ... ; // n has a retainCount of 2 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 - Getting a random object from NSArray without duplication

I have an NSArray with 17 objects, something like this: NSArray *objArray = [[NSArray alloc]initWithObjects: @ ... for the same objects. 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 - Force Landscape ViewController in iOS 7

I have more than ten ViewControllers in portrait mode, but I need to force a single one in Landscape ... of the device′s orientation. 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 - What is self in ObjC? When should i use it?

What does self mean in Objective-C? When and where should I use it? Is it similar to this in Java? See Question&Answers more detail:os...

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

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579 views

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objective c - Convert milliseconds to NSDate

I have this "1273636800000" and I want to convert it to this format "Wed Mar 03 2010 00:00:00 GMT- ... a similar problem and found the 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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444 views

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objective c - EXC_BAD_ACCESS in heightForRowAtIndexPath iOS

I'm working on an application where I have a custom subclass of UITableViewCell. I want to make the cell's ... Any ideas why this is happening? See Question&Answers more detail:os...

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

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578 views

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objective c - How do I weak link frameworks on Xcode 4?

I need to weak link some framework with my target. But I can't find how to do it... If I try to run ... /iAd Reason : Image not found Thanks ! See Question&Answers more detail:os...

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

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444 views

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objective c - Prompt login alert with Twitter framework in iOS5?

As you all may know, since iOS5 there is a native Twitter framework which make it easy to post tweets from your ... Billy (My first post on SO) See Question&Answers more detail:os...

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

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373 views

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objective c - How does rand() work? Does it have certain tendencies? Is there something better to use?

I have read that it has something to do with time, also you get from including time.h, so I assumed ... library or the Foundation framework? 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 - Track all ObjC method calls?

Sometimes when looking at someone else's large Objective-C program, it is hard to know where to begin. In ... limited to non-Apple methods. See Question&Answers more detail:os...

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

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368 views

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objective c - Is it possible to reverse-engineer my iPhone application?

I have created an iPhone application, and I want to send the compiled .app file to my client, so he ... application from the compiled product? See Question&Answers more detail:os...

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

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417 views

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objective c - What is the visibility of @synthesized instance variables?

If you have a property in your public interface like the following @interface MyClass : NSObject @property(strong ... this documented anywhere? See Question&Answers more detail:os...

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

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527 views

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objective c - Under automatic reference counting, why are retain, release, and dealloc not allowed?

When trying to use -retain, -release, and -dealloc while building my application using automatic reference ... automatic reference counting? See Question&Answers more detail:os...

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

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311 views

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objective c - iPhone - What are reuseIdentifiers (UITableViewCell)?

From the official documentation: The reuse identifier is associated with a UITableViewCell object that the table-view's ... place where it is? 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 - iOS Simulator games run very slow (low fps)

Diving into sprite kit (xcode 5). There are two example programs I'm working with, 1. the default ... only 30 objects using 2DToolkit. See Question&Answers more detail:os...

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

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312 views

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objective c - What does the "Couldn't compile connection:" error mean?

I'm getting the following error from Xcode: Couldn't compile connection: <IBCocoaTouchOutletConnection:0x401538380 <IBProxyObject ... Xcode 4.5. See Question&Answers more detail:os...

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

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360 views

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objective c - Does ARC work with Core Graphics objects?

I recently started a new project using Automatic Reference Counting (ARC). When I assigned the contents of ... still functions correctly then? See Question&Answers more detail:os...

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

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445 views

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objective c - Simple iPhone motion detect

I need to detect when the gyroscope / accelerometer is activated a certain amount. Basically to detect when ... something. Thanks in advance. See Question&Answers more detail:os...

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

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