Recent questions tagged objective

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objective c - umbrella header for module 'myFramework' does not include header 'otherFramework.h'

My Swift / iOS9 framework 'viewer_protocol' uses another and external Objective-C framework (CocoaAsyncSocket). I' ... the warning disappears. See Question&Answers more detail:os...

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

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577 views

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objective c - What gets called when a UISlider value changes?

Does a method get called when a UISlider's value changes? I want to be able to update a value based on the ... value, but only when it changes. See Question&Answers more detail:os...

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

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363 views

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objective c - How to link to the iTunes store from iPhone app?

I am trying to set up an application in which users will be able to stream music. When the user is streaming ... name, am I mistaking? 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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447 views

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objective c - Memory management and performSelectorInBackground:

Which is right? This: NSArray* foo = [[NSArray alloc] initWithObjects:@"a", @"b", nil]; [bar ... that you just got lucky... 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 category - How to subclass NSTextAttachment?

Here is my problem: I use Core Data to store rich text input from iOS and/or OS X apps and would like ... is different from the iOS class) ? See Question&Answers more detail:os...

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

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656 views

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objective c - iPhone iOS how to add linear gradient to a UIButton under the button's text or image?

I'm working on creating fancy looking UIbuttons by adding linear gradient to the button. However I'm not ... addSublayer:gradientLayer]; } } See Question&Answers more detail:os...

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

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534 views

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objective c - How do I use the Linea-Pro SDK for IOS?

Does anyone know of or have a manual on how to script in xcode with the linea-pro. I have hunted the ... you need more information please ask. See Question&Answers more detail:os...

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

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465 views

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objective c - iOS, detect ad-hoc from code

I want to use a different API url for my iPhone app when I'm debugging or doing an ad-hoc deployment. Is ... Url rather than the default one? See Question&Answers more detail:os...

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

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451 views

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objective c - How do I unit test HTTP request and response using NSURLSession in iOS 7.1?

I'd like to know how to "unit test" HTTP requests and responses using NSURLSession. Right now, my completion ... not want to mock responses. See Question&Answers more detail:os...

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

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368 views

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objective c - UISegmentedControl setImage: Bug in iOS7

I have a UISegmentedControl in my app. As of iOS7 GM, the images I use are not showing up when run on ... anyone found a workaround to 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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533 views

1 answer

objective c - Under iOS 7, how do I hide and show status bar on the fly (whenever I want to)

Say a user is in a View Controller and wants to enter a "full screen" type mode where the status bar is hidden, ... wits end. How do I hide 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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430 views

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objective c - Customizing UISegmentedControl in iOS 5

Here is my problem. I am customizing a UISegmentedControl by setting the background and divider images in the following ... wrong with my 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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513 views

1 answer

objective c - Run logic tests in Xcode 4 without launching the simulator

I want to run tests in Xcode 4 using OCUnit without launching the simulator. Please, don't try and convince me I ... up that mess with my tests. See Question&Answers more detail:os...

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

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1.1k views

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objective c - enum values: NSInteger or int?

tl;dr Version How are the data types of an enum's constants guaranteed to be NSUInteger instead of unsigned ... are unsigned int or NSUInteger? See Question&Answers more detail:os...

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

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488 views

1 answer

objective c - Return value for performSelector:

What will the return value for performSelector: if I pass a selector that returns a primitive type (on object), ... which will return an int)? 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

1 answer

objective c - "Expected a type" error pointing to the return type of a method

I've attempted to compile, but every time I do, one method throws a strange "expected a type" error. I have ... fine.. Why is this 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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555 views

1 answer

objective c - ios crash EXC_BAD_ACCESS KERN_INVALID_ADDRESS

MyApp works well 98% of the time, but sometimes it crashes. It's so random. The crash report shows the ... down? All help is 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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505 views

1 answer

objective c - How to play a music file using URL link in iPhone?

I want to play a music file using URL Link in the iPhone. But when I use the below code I am getting error ... ]); else [audioPlayer play]; } See Question&Answers more detail:os...

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

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362 views

1 answer

objective c - How do you use a moving average to filter out accelerometer values in iPhone OS

I want to filter the accelerometer values using a moving average, how is this done? 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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393 views

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objective c - Dealloc method in iOS and setting objects to nil

I have a pretty basic question. In some examples I've seen, objects are just released in the dealloc ... to nil after releasing advantageous? See Question&Answers more detail:os...

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

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588 views

1 answer

objective c - Setting UITextView frame to content size no longer works in Xcode 5

The code snippet below worked to resize a UITextView frame to it's content height, before installing Xcode 5 but ... the fix. Any thoughts? See Question&Answers more detail:os...

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

0 votes

391 views

1 answer

objective c - Looking for info on custom drawing of interface components (Cocoa)

It seems like more and more OS X apps these days are doing all kinds of fancy drawing stuff for custom ... help is greatly 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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398 views

1 answer

objective c - Reversal of Custom Segue with Storyboarding

I have a custom segue animation that occurs when pushing a new view controller onto the stack. When popping the ... :NO]; }]; } 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 - How can I retrieve Swift "header" files for Cocoa APIs?

The way I know I can view the automatically-translated Swift versions of Cocoa APIs is by command-clicking a ... from the command line? See Question&Answers more detail:os...

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

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745 views

1 answer

objective c - How to resize a parent view based on the size of subviews layouted with Autolayout

I am preparing a custom view which looks similar to the example shown in the screenshot. I add all user ... for the currently attached subviews. See Question&Answers more detail:os...

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

0 votes

428 views

1 answer

objective c - Recursive Block Retain Cycles

Will this lead to any sort of retain cycle? Is it safe to use? __block void (^myBlock)(int) = [^void (int ... ]; myBlock(10); myBlock = nil; See Question&Answers more detail:os...

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

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490 views

1 answer

objective c - How do you reset an iPhone App's Keychain?

I would like to know if there is a way to reset my app's Keychain. I am wondering whether anything like [ ... one by one from the app. See Question&Answers more detail:os...

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

0 votes

388 views

1 answer

objective c - What is the purpose of using blocks

I want to use blocks in my application, but I don't really know anything about blocks. Can anyone explain how ... should use blocks in my 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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