Recent questions tagged Cocoa

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cocoa - Why does one have to use CALayer's presentationLayer for hit-testing?

I was working on a Cocoa Touch application, and trying to handle touches by determining which sublayer of a view' ... same frames, bounds, etc.? See Question&Answers more detail:os...

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

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470 views

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cocoa touch - Using a UISlider to change volume

What's the best way to use a UISlider to change the volume of the iPhone in an app? I've tried using ... ]; [self.view addSubview:volumeView]; See Question&Answers more detail:os...

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

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450 views

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cocoa - Objective-C: instance variables out of scope in debugger

I have a superclass and a subclass, both of which define instance variables. Rough outline of superclass: /* ... the variable with the debugger See Question&Answers more detail:os...

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

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cocoa touch - iOS 7 UINavigationController NavBar per controller color animation

Is there any way to have different barTintColor of UINavigationController's UINavigationBar on different pushed ... ideas and answers See Question&Answers more detail:os...

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

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568 views

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cocoa touch - iPhone CoreLocation: How to get the most accurate speed

I'm experimenting with adding the GPS functionality to my iPhone app. It's a workout app that will be used ... to get more accurate results? See Question&Answers more detail:os...

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

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450 views

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cocoa touch - UIbutton with longpress and Touchup inside

How to create a UIButton With two actions. I know by using UILongPressGestureRecognizer we can perform Longpress. But my ... "single tapped"); } See Question&Answers more detail:os...

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

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cocoa - Cross-model relationships in NSManagedObjectModel from merged models?

Is it possible to model relationships between entities that are defined in separate NSManagedObjectModels if the ... in-model relationships? See Question&Answers more detail:os...

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

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450 views

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cocoa touch - Get version number of iOS Universal Framework in client

This is likely not limited to iOS Universal Frameworks but all xxx.framework files. However I can't ... specifically an embedded framework. See Question&Answers more detail:os...

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

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444 views

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cocoa touch - New to Core Data for iphone

I am new to the iphone platform and am creating an app that retrievals a rss feed and displays it in ... accomplish would also be 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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520 views

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cocoa touch - iOS: Does force quitting the app disables background upload using NSURLSession?

The question is around NSURLSession and NSURLSessionUploadTask. I'm uploading large files to server and noticed ... however nothing happens. See Question&Answers more detail:os...

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

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436 views

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cocoa touch - Is there any data binding mechanism available for iOS?

In .NET I just do something like DataForm.Source = Object and then magic happens. Platform routes data changes ... Touch and CoreData objects? See Question&Answers more detail:os...

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

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486 views

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cocoa - Why shouldn't you use objc_msgSend() in Objective C?

The Objective C Runtime Guide from Apple, states that you should never use objc_msgSend() in your own code, and ... objc_msgSend() in your code? See Question&Answers more detail:os...

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

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511 views

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cocoa touch - Compare two NSStrings

In my app there is a mechanism that requires that at a certain point two NSStrings will be the same to ... comparison? Am I missing 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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514 views

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cocoa - Easiest way to format a number with thousand separators to an NSString according to the Locale

I can't seem to find an easy way to do it. The exact thing I need is: [NSString stringWithFormat:@"%d doodads" ... ): @"1,234 doodads" 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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647 views

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cocoa - What is the maximum value of NSInteger?

I need to store the maximum value of an NSInteger into an NSInteger? What is the correct syntax to do it? 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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432 views

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cocoa touch - Organizing iOS project for MVC design pattern

I'm working on a multiview app for iPhone and currently have my views (VIEW) set up and their transitions ( ... and pardon my MVC noobery. See Question&Answers more detail:os...

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

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481 views

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cocoa touch - How to get the current application icon in ios

Is there a way to get the current application icon in a cocoa-touch app? 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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561 views

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cocoa - Accessing command line arguments in Objective-C

Is there any complete documentation (the interface is present in crt_externs.h) about this functions : _NSGetArgc ... about this functions. See Question&Answers more detail:os...

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

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455 views

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cocoa touch - How to switch UITableView's NSFetchedResultsController (or its predicate) programmatically?

I have a UITableView that displays a subset of a large number of entities named "Documents". The subset is ... . Thanks for any suggestion. See Question&Answers more detail:os...

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

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575 views

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cocoa - Find Mac OS X version number in objective c

How can I find the version number of Mac OS X (eg. "10.6.7") from my Cocoa Objective-C application? See Question&Answers more detail:os...

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

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563 views

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cocoa - View based NSTableView editing

I'm not sure what I'm doing wrong. Since I couldn't find any other questions (or even documentation) ... is downloadable here: TableTest.zip See Question&Answers more detail:os...

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

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667 views

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cocoa touch - Guess encoding when creating an NSString from NSData

When reading an NSString from a file I can use initWithContentsOfFile:usedEncoding:error: and it will guess the ... NSData instead of files? See Question&Answers more detail:os...

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

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609 views

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cocoa - How do you set the text in an NSTextField?

I'm trying to set the text in an NSTextField, but the -setStringValue: and -setTitleWithMnemonic: methods are not working. Any ideas? See Question&Answers more detail:os...

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

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678 views

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cocoa - Reverse engineering an NSMenu for a Status Bar Item

I'm want to create a menu for a status bar item like the one seen in Tapbot's PastebotSync application: ... better ideas or suggestions? 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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489 views

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cocoa touch - iPhone: Get camera preview

I'd like to get the image that is being displayed on the UIImagePickerController when user uses the camera. And ... am I doing wrong? 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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458 views

1 answer

cocoa - Sorting a NSArray

I have a NSArray of objects. Those objects have an int attribute called "distance". I would like to sort my ... methods are working... 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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510 views

1 answer

cocoa - iTunes-style NSWindow subclass?

Is there an open-source library for Cocoa to create a window following iTunes' style? That is the window controls ... 't need a window title. See Question&Answers more detail:os...

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

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501 views

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cocoa touch - UINavigationBar autoresizing

In my app, I got a UINavigationController. Unfortunately, when I rotate the device and the interface orientation changes, ... apps I've seen? See Question&Answers more detail:os...

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

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