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      Questions tagged [objective-c]

      This tag should be used only on questions that are about Objective-C features or depend on code in the language. The tags [cocoa] and [cocoa-touch] should be used to ask about Apple's frameworks or classes. Use the related tags [ios], [macos], [apple-watch] and [tvos] for issues specific to those platforms.

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      Compilation issue in building jitsiMeet SDK 2.11.0 on xcode 12.2

      ** ARCHIVE FAILED ** The following build commands failed: CompileC /Users/ankitk/Library/Developer/Xcode/DerivedData/jitsi-meet-ferllufkkwhoynapkghzgrlqsqpx/Build/Intermediates.noindex/...
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      Override init with frame not working correctly [closed]

      I created custom class and wrote init like this @objc class CustomDatePicker: UIDatePicker { override init(frame: CGRect) { super.init(frame: frame) setDatePickerStyle() } required init?(...
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      How to save the web page for offline in WKWebView?

      In WKWebView.h, I came through this method: -(void)createWebArchiveDataAtLocationWithCompletionHandler:(void (^)(NSData *, NSError *))completionHandler NS_REFINED_FOR_SWIFT API_AVAILABLE(macos(11.0), ...
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      UITraitCollection always returns UIUserInterfaceStyle while detecting light mode or dark mode

      I need to change the color of UIs depends on which theme mode the device is using. After a few researches, I tried this: -(BOOL)isDarkMode{ if (@available(iOS 13.0, *)) { if( self....
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      17 views

      How can I draw an overline in a UILabel?

      I'm trying to draw an overline (as opposed to strikethrough or underline) within a UILabel. So far I have not seen any direct way to implement this using NSAttributedString. Is there any way to do ...
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      13 views

      CGImageCreate: invalid image alphaInfo

      I am getting a weird error that I am not able to pin point which part of the code is causing it. When running an iOS app that uses the camera image to detect barcodes, I get the following error: 2020-...
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      13 views

      How can I add a UISwitch to a specific UIScrollView?

      how can I add a UISwitch to a specific UIScrollView? As I guess it can be done with a tag, but I am having difficulties. My example code with UIScrollView and UISwitch: @implementation NSPage { ...
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      20 views

      iphone app for MQTT and adafruit objc not working

      I have built a MQTT client on an ESP8266-01 which gathers sensor data and publishes it to my account dashboard on Adafruit.com. I also built one on an ESP8266-12e which subscribes to my Adafruit ...
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      36 views

      How to add a Swift example project into my own cocoa pod project

      I created my own cocoapod library in Objective-C and it works well. *Now, I am going to add some features into the library, and I got a Swift example project. The problem is that the Swift example ...
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      21 views

      How to use object-c to get macos audio output devices

      I can only get audio input devices NSArray* adevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio]; for (AVCaptureDevice* device in adevices) { NSLog( @"%@\n", device....
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      How to hide controls view only even with controls props are set true in react-native-video in ios?

      Even if controls are enabled i just want to hide controls view only because if controls are enabled it shows the playback in notification centre the only thing i want to achieve is to hide controls ...
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      31 views

      Setting UITextField constraints to continue in newline

      I've got UITextField widget inside a xib view controller with Scrolls layout, and I wish to set it with a proper string during runtime. However, the string length may exceed the containing view ...
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      How to find the objc4(Runtime/libobjc.A.dylib) version corresponding to the ios system version [closed]

      How to find the objc4(Runtime/libobjc.A.dylib) version corresponding to the ios system version
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      33 views

      what kind exception is a decimal number exactness error?

      Read about swift program exceptions in NSExceptionName,the explanation about decimalNumberExactnessException confused me.What exactly is decimal number exactness error and what kind code could get a ...
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      19 views

      Module 'Mixpanel' not found. mixpanel-iphone

      Integration Method: CocoaPods Xcode Version: 12.1 Library Version: 3.6.3 Platform: iOS Language: Objective-C Description: Issue when integrating Mixpanel Notification Service, Module Mixpanel not ...

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