Recent questions tagged objective

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objective c - iOS CustomTableViewCell: elements not aligining correctly

I am learning iOS for the first time while building an app. In one of the requirements, the UITableViewCell ... please guide what is wrong? 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 - AFHTTPRequestOperationManager post multi-part request not working

Here is the template that I am using from the Git Doc AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager ... toString()); } 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 - Inline Block With Return Type

Is it possible in Objective-C to create a block inline and use its return type? For example, can I create a ... to be impossible, or very easy. 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 - Calculate lessthan value using NSExpression?

For the following block of code: NSString *formul=@"5 < 9"; NSExpression *e = [NSExpression expressionWithFormat:formul]; int ... "5 < 9 == 1"' 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 resume a movie that's being played with presentMoviePlayerViewControllerAnimated

I'm uisng this code to display a movie: MPMoviePlayerViewController *mp = [[MPMoviePlayerViewController alloc] ... to the background? 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 - retrieving integer value from the UITextField into a NSInteger variable

UITextField *textField; NSInteger intRollNumber; I want to take rollNumber as input from the textField and store ... the string into integer. 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 - comparison of two strings fails

I make a comparison of two strings which are obviously identical. Unfortunately my if clause doesn′t work as ... identical: Any clues ? 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 - NS_REFINED_FOR_SWIFT and return value

I'm new with Swift and I begin exploring some feature for bridging with Objective-C. Currently I have ... for my NS_REFINED_FOR_SWIFT macro? 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 - could NaN be causing the occasional crash in this core audio iOS app?

My first app synthesised music audio from a sine look-up table using methods deprecated since iOS 6. I have ... are described in this post! 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 - NSNetService works fine, but can't get hostName, resolve causes error

I'm using Bonjour with an NSNetService to publish a server from my iPhone. It all works as expected, I can ... what I could be doing wrong? 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 - force UIViewController to be in Landscape mode iOS7

I've implemented the proper functions, but they don't get triggered? I've tried several ... return UIInterfaceOrientationLandscapeLeft; } 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 - NSUTF8StringEncoding returns nil NSString

I'm developing an iOs 4 application with latest SDK and XCode 4.2. I'm using a web service to retrieve ... Any clue about what is happening? 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 - Questions about a readonly @property in ARC

In my interface (.h) file, I have @property(readonly) NSString *foo; and in my implementation (.m) file, ... and assign anymore, should I? 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 - Is there a way to exclude some files from submitting to the iOS app store

I am working on an app that i would like to submit to the store and i have some files that is part of ... delete them also? Thanks in advance! 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 - NSMutableArray removeObjectAtIndex strange issue.

Strange behaviour in NSMutableArray. I've created object and filled it. NSMutableArray *array = [[NSMutableArray alloc] ... i doing wrong here? 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 - Specifying UISegmentedControlNoSegment to UISegmentedControl's selectedSegmentIndex has no Effect on iOS 13

I am the maintainer of STAControls which subclasses various UIControls, one of which is UISegmentedControl. Within that ... to work around this? 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 - Calling a method on self while in dealloc

I have a dictionary of objects that need to be cleaned up before they are released. I have a method that ... that functionality in my -dealloc? 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 - Substring with range out of bounds?

Okay, so this is a bit confusing (well to me). I have a string that has a single number I want out ... ? Any help would be appreciated. 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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objective c - Double parentheses in sample code

I see a lot of code like this in samples and in stubs that XCode generates: if ((self = [super ... of double parenthesis in the conditional. 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 does assigning a literal string to an NSString with "=" actually do?

What does the following line actually do? string = @"Some text"; Assuming that "string" is declared thusly in ... need to be released? 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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objective c - How to run a WatchKit App

I can't run a watchkit app from a new project. If I run Apple's sample project it runs fine. If I add ... . This is basically what I see. 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 - Unicode characters being drawn differently in iOS5

Setting the title of a uibutton to u25C0 causes it to have a blue background in iOS5 but not in iOS4. ... the unicode character stated earlier. 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 connect map annotation view buttons with database to go to another view?

- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation { //if it's user ... . Thank you! =) 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 - Connect Two XIBs To One ViewController

I am, in all basics, wanting to have a view for iPhones, and one for iPads. However, I want to ... to one viewcontroller? Thanks, Jake 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 - Applying a vortex / whirlpool effect in Box2d / Cocos2d for iPhone

I've used Nick Vellios' tutorial to create radial gravity with a Box2D object. I am aware of Make a Vortex ... , spriteBody->GetWorldCenter() ); 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 - Schedule multiple, daily events with NSTimer?

I have a schedule cache stored in an NSDictionary. For the example below, I have a schedule time of January 13, ... true/> </dict> </array> See Question&Answers more detail:os...

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

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2.1k views

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objective c - KVC strange behavior

Why this code works fine: NSArray* arr = @[[CALayer layer], [CALayer layer]]; NSString *sumKeyPath = @" ... floatValue]; give the same error 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 - Local variable assign versus direct assign; properties and memory

In objective-c I see a lot of sample code where the author assigns a local variable, assigns it to a property, ... 'm in full optimize/QA mode. See Question&Answers more detail:os...

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

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