Swift’s compatibility with C and Objective-C lets you create a project that contains files written in either language.
Questions tagged [objective-c-swift-bridge]
117 questions
5
votes
2 answers
React Native Bridging: Passing JSON to Swift function
Im a rookie in Swift and Objective-C but Im trying to make a bridge from React Native to Swift, and send a JSON and a JSON Array as params to Swift.
Inside React I would like to call this function:
startTrack('some url string', { artist: 'Bruce…
m0rfarpeter
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5
votes
1 answer
NS_SWIFT_NAME for Importing C function as a class extension
I have two C functions:
extern UIColor* LNRandomDarkColor();
extern UIColor* LNRandomLightColor();
As an exercise, I am trying to import them into Swift as extension methods to UIColor.
Following Apple's "What's New in Swift" presentation from WWDC…
Léo Natan
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5
votes
2 answers
Is it possible to cast "AnyObject" to a swift struct
I have a swift method which receives a struct as a parameter.
Since the structs aren't bridged to objective-c, this method is invisible in the bridging header.
I was forced to created a new "identical" method that receives "AnyObject" instead of the…
Avba
- 14,822
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5
votes
2 answers
NSClassFromString using a Swift File
I have written a class in Swift in my existing Objective-C project. So far, the bridging has worked very well. I do have a method however, where I generate a class at runtime using NSClassFromString(). When the string is my Swift class name, it…
ahoang
- 139
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- 9
5
votes
1 answer
'LOG_INFO' macro redefined warning after moved project to swift bridging project
I got several warnings like these:
Swift compiler warning:
CompileSwiftSources normal arm64 com.apple.xcode.tools.swift.compiler
/Myfolder/Pods/Headers/CocoaLumberjack/DDLog.h:176:9: 'LOG_INFO' macro…
angelokh
- 9,426
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- 139
4
votes
1 answer
How do I create an Objective-C bridging header?
I'm following this guide on adding OneSignal to React Native, and there is one section where is says:
Open NotificationService.m or NotificationService.swift and replace the whole file contents with the code below:
If you are…
gkeenley
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4
votes
1 answer
Init a `sockaddr` struct with a given IP address in Swift
I playing around with Apple's Reachabilitty class in Swift.
The web server in my private Wi-Fi runs on http://10.0.0.1. To check its reachability I want to use the following function from Reachability.h (not the one with hostname):
/*!
* Use to…
winklerrr
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4
votes
1 answer
Objective-C call Swift function
Swift function defined in MySwift.swift File:
func SomeSwift()
{
}
SomeSwift() is not defined in any Swift class, it is just a pure function.
After CMD + B to build the project, open Project-Swift.h, the SomeSwift() isn't show in there.
Does the…
al03
- 144
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4
votes
1 answer
Import Swift code to Objective-C file
I have created a Swift project and imported Objective-C files. During import Xcode asked me to create a bridging header and created a header.
Now in the Objective-C files of the same project I want to use Swift class methods. I googled about…
Rakesh
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3
votes
2 answers
Why do properties modified by @optional become immutable?
I have an Objective-C protocol that contains a property as follows:
#import
@protocol Playback
@optional
@property (nonatomic, nonnull) NSURL *assetURL;
@end
PlayerController has a property of type…
Rakuyo
- 390
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- 15
3
votes
1 answer
Using Swift Project (Siren) in an Objective-C iOS Application
I am trying to use a popular swift library, Siren, in an iOS Objective-C application. I have included the library as a framework using cocoapods, I ran pod init and then pod install with a podfile like this:
# Uncomment the next line to define a…
mogelbuster
- 1,066
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3
votes
0 answers
"Failed to import bridging header" iOS Unit tests
I have an iOS project with 2 development targets and 1 unit test target. The development targets are hybrid (using Objective-c and Swift at the same time), thus I have to use Bridging-Header.h within the project.
The problem is when I want to import…
Hassan Shahbazi
- 1,543
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3
votes
0 answers
Guidelines to nullability when bridging Objective-C code
I'm currently a novice in Swift, but I'm a maintainer of an Objective-C framework which is a wrapper around a C library, for which I'd like to have the nicest API possible.
I'm looking at this kind of code
/// The index checksum
@property…
tiennou
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3
votes
2 answers
Bridge Class Functions in React Native
Say I have a class called ExampleClass.
Say I then write code like so:
@objc(ExampleClass)
class ExampleClass: NSObject {
@objc class func exampleFunc() -> Void {
}
}
With an Objective-C file header like so:
#import…
Abraham P
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3
votes
1 answer
KVO for dependent key paths does not work properly for Swift class
I'm trying to write a wrapper around URLSessionTask in Swift. According to the documentation
All task properties support key-value observing.
So I want to keep this behavior and make all the properties on my wrapper also KVO-compliant (usually…
Joachim Kurz
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