logo
down
shadow

Swift Extension fails adding overloaded methods to Objective-C class


Swift Extension fails adding overloaded methods to Objective-C class

By : WilsonWei
Date : November 22 2020, 10:33 AM
Any of those help ObjC doesn't support method overloading. When you extend an ObjC class, the interface to your code is the ObjC runtime—even if you're calling your Swift code in that class from other Swift code—so your class' interface can't use features of Swift that aren't also present in ObjC.
As you've noted, this should probably be a compile error. I'd recommend filing a bug about that, especially since you've already put together a handy test case.
code :


Share : facebook icon twitter icon
Using Swift clases with overloaded methods in Objective C

Using Swift clases with overloaded methods in Objective C


By : user2347249
Date : March 29 2020, 07:55 AM
around this issue As of swift2.0 you can differentiate if you're planning on using both in Objective C:
code :
@objc(randomLoInt:HiInt:)
func random(#lower: Int , upper: Int) -> Int {
    return lower + Int(arc4random_uniform(UInt32(upper - lower + 1)))
}

@objc(randomLoFlt:HiFlt:)
func random(#lower: CGFloat , upper: CGFloat) -> CGFloat {
    return CGFloat(arc4random() % 1) / 0
}
@nonobjc
func random(#lower: Int , upper: Int) -> Int {
    return lower + Int(arc4random_uniform(UInt32(upper - lower + 1)))
}

@nonobjc
func random(#lower: CGFloat , upper: CGFloat) -> CGFloat {
    return CGFloat(arc4random() % 1) / 0
}
Adding an convenience initializer extension for Objective-C class to be used in Swift

Adding an convenience initializer extension for Objective-C class to be used in Swift


By : Lorry B
Date : March 29 2020, 07:55 AM
With these it helps i think it is better to write subclass for ScannedPeripheral instead of extension because extensions may not support for initialisers and override methods.
eample
code :
class SubClassScannedPeripheral: ScannedPeripheral {
  override class func initWithPeripheral(peripheral: CBPeripheral, rssi: Int32, isPeripheralConnected: Bool) -> ScannedPeripheral {
   return ScannedPeripheral.initWithPeripheral(peripheral, rssi: rssi, isPeripheralConnected: isPeripheralConnected);
}
}
UIColor swift extension w/ class access from Objective-C

UIColor swift extension w/ class access from Objective-C


By : user7922949
Date : March 29 2020, 07:55 AM
it should still fix some issue Assuming you're using Swift 4's @objc inference, darkGray must be declared @objc:
code :
@objc
extension UIColor
{
    @objc
    public class Scheme1: NSObject {
        @objc static var darkGray: UIColor! {
            return UIColor(red: 16.0/255.0, green: 16.0/255.0, blue: 19.0/255.0, alpha: 1.0)
        }
    }
}
@objc
extension UIColor
{
    @objc
    public class Scheme1: NSObject {
        @objc var darkGray: UIColor! {
            return UIColor(red: 16.0/255.0, green: 16.0/255.0, blue: 19.0/255.0, alpha: 1.0)
        }
    }

    @objc public static var scheme1 = Scheme1()
}
@objc' can only be applied to an extension of a class , calling extension method from swift to objective c

@objc' can only be applied to an extension of a class , calling extension method from swift to objective c


By : user2827598
Date : March 29 2020, 07:55 AM
hope this fix your issue You can't use String in Objective-C. Swift structs can't be used in Objective-C.
One solution is to mirror your String extension in an extension to NSString.
code :
extension String {
    static func className(_ aClass: AnyClass) -> String {
        return NSStringFromClass(aClass).components(separatedBy: ".").last!
    }

    func localize() -> String {
        return NSLocalizedString(self, comment: "")
    }
}

@objc extension NSString {
    static func className(_ aClass: AnyClass) -> NSString {
        let res = String.className(aClass)

        return res as NSString
    }

    func localize() -> NSString {
        let str = self as String

        return str.localize() as NSString
    }
}
NSString *name = [NSString className:[SomeObjectiveCClass class]];
NSLog(@"name = %@", name);

NSString *localized = [@"test" localize];
Expose Objective C Class Extension Property in Swift

Expose Objective C Class Extension Property in Swift


By : Caleb Koopmann
Date : March 29 2020, 07:55 AM
I hope this helps . Unfortunately, there isn't a way to do this purely with Swift. However, you can expose the property in an Objective-C file in your test target and then put that in your test target's bridging header.
Add MyVC+Tests.h to your test target:
Related Posts Related Posts :
  • Move UIView above UITableView when user Scrolls Down
  • adding object to nsmutablearray with custom delegate function giving error
  • Cocoa editing NSBezierPath
  • Perform a action on specific time using Parse
  • Objective-C: How to convert json value to BOOL?
  • How to make an int counter for the days
  • Assigning Label Value with Selected Table View Cell
  • SpriteKit - Preloader using GCD
  • Can dependency injection like Typhoon replace multiple singletons?
  • Objective C - How to determine if a folder is a package?
  • How can one draw a background in the elastic portion of an NSScrollView?
  • A solution for my issue with sending some info from an array to Parse
  • Determine if key is incorrect with CCCrypt kCCOptionPKCS7Padding-Objective C
  • PQgetResult always returns NULL
  • self.navigationController? is nil when pushing from a objective-c viewController to a Swift ViewController
  • Where to add subViews that I want floating in an NSScrollView using AutoLayout?
  • 'User' in 'User-defined classes'
  • How to get value of a key in NSDictionary?
  • Adding Border Line to UITableView in StoryBoard
  • Mac App Storyboard - Access Document in NSViewController
  • Objective c, reposition a view above the keyboard in one single animation
  • Dismiss modal segue
  • Error message is saying my data is NULL - NSKeyedUnArchiver - I've followed all the steps - still won't work
  • Remove apostrophe in CFStringTransform results
  • Label showing wrong values while NSLog shows the right ones in SpriteKit
  • How to work with locally modified Cocoapod which don't include podspec?
  • What does kCGWindowSharingState actually do?
  • It is possible to copy a CFTypeRef?
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org